Trial Outcomes & Findings for Study to Characterize the Efficacy of a Dual Active Dentifrice for the Relief of Dentin Hypersensitivity (NCT NCT03943095)

NCT ID: NCT03943095

Last Updated: 2020-09-11

Results Overview

Evaporative air sensitivity was assessed on facial surfaces of eligible incisor,canine and pre-molar teeth by directing a one second application of air from standard dental syringe held perpendicular to tooth surface, approximately 1-2 millimeter (mm) coronal to the gingival margin from a distance of approximately 1 centimeter (cm).Participant response to the stimulus was evaluated using the Schiff sensitivity scale, an examiner-based index scored immediately following administration of the evaporative air stimulus.0=Does not respond to air stimulation;1=Responds to air stimulus but does not request discontinuation of stimulus;2=Responds to air stimulus and requests discontinuation or moves from stimulus;3=Responds to stimulus,considers stimulus to be painful, requests discontinuation of the stimulus. Score range 0-3; a decrease in Schiff sensitivity score indicates an improvement.Mean was calculated once by selecting two test teeth which were located in different quadrants of mouth.

• Recruitment status: COMPLETED
• Study phase: PHASE2
• Target enrollment: 123 participants
• Primary outcome timeframe: Baseline (Day 0)
• Results posted on: 2020-09-11

Participant Flow

Participants were recruited from one center in Canada

A total of 123 participates were screened and enrolled, out of which 104 participants were randomized in the study and 19 participants were not randomized.

Participant milestones

Measure	Test Dentifrice Participants were instructed to apply a strip of dentifrice (a full brush head) containing 5 percent (%) weight by weight (w/w) potassium nitrate and 0.454% w/w stannous fluoride (1100 parts per million \[ppm\] fluoride). Participants brushed their two selected 'test teeth' first, followed by the whole mouth for at least one timed minute, twice daily (morning and evening), and were permitted to rinse with water post-brushing.Participants received test dentifrice via a manual toothbrush throughout the study duration (8 weeks i.e. till Day 56) twice daily.	Control Dentifrice Participants were instructed to apply a strip of dentifrice (a full brush head) containing 0.454% w/w stannous fluoride (1100 ppm fluoride). Participants brushed their two selected 'test teeth' first, followed by the whole mouth for at least one timed minute, twice daily (morning and evening), and were permitted to rinse with water post-brushing. Participants received control dentifrice via a manual toothbrush throughout the study duration (8 weeks i.e. till Day 56) twice daily.
Overall Study STARTED	52	52
Overall Study COMPLETED	51	51
Overall Study NOT COMPLETED	1	1

Reasons for withdrawal

Measure	Test Dentifrice Participants were instructed to apply a strip of dentifrice (a full brush head) containing 5 percent (%) weight by weight (w/w) potassium nitrate and 0.454% w/w stannous fluoride (1100 parts per million \[ppm\] fluoride). Participants brushed their two selected 'test teeth' first, followed by the whole mouth for at least one timed minute, twice daily (morning and evening), and were permitted to rinse with water post-brushing.Participants received test dentifrice via a manual toothbrush throughout the study duration (8 weeks i.e. till Day 56) twice daily.	Control Dentifrice Participants were instructed to apply a strip of dentifrice (a full brush head) containing 0.454% w/w stannous fluoride (1100 ppm fluoride). Participants brushed their two selected 'test teeth' first, followed by the whole mouth for at least one timed minute, twice daily (morning and evening), and were permitted to rinse with water post-brushing. Participants received control dentifrice via a manual toothbrush throughout the study duration (8 weeks i.e. till Day 56) twice daily.
Overall Study Incorrectly dispensed wrong box kit	0	1
Overall Study Withdrawal by Subject	1	0

Baseline Characteristics

Study to Characterize the Efficacy of a Dual Active Dentifrice for the Relief of Dentin Hypersensitivity

Baseline characteristics by cohort

Measure	Test Dentifrice n=52 Participants Participants were instructed to apply a strip of dentifrice (a full brush head) containing 5 percent (%) weight by weight (w/w) potassium nitrate and 0.454% w/w stannous fluoride (1100 parts per million \[ppm\] fluoride). Participants brushed their two selected 'test teeth' first, followed by the whole mouth for at least one timed minute, twice daily (morning and evening), and were permitted to rinse with water post-brushing.Participants received test dentifrice via a manual toothbrush throughout the study duration (8 weeks i.e. till Day 56) twice daily.	Control Dentifrice n=52 Participants Participants were instructed to apply a strip of dentifrice (a full brush head) containing 0.454% w/w stannous fluoride (1100 ppm fluoride). Participants brushed their two selected 'test teeth' first, followed by the whole mouth for at least one timed minute, twice daily (morning and evening), and were permitted to rinse with water post-brushing. Participants received control dentifrice via a manual toothbrush throughout the study duration (8 weeks i.e. till Day 56) twice daily.	Total n=104 Participants Total of all reporting groups
Age, Continuous	51.4 Years STANDARD_DEVIATION 10.70 • n=5 Participants	51.3 Years STANDARD_DEVIATION 10.45 • n=7 Participants	51.3 Years STANDARD_DEVIATION 10.53 • n=5 Participants
Sex: Female, Male Female	37 Participants n=5 Participants	41 Participants n=7 Participants	78 Participants n=5 Participants
Sex: Female, Male Male	15 Participants n=5 Participants	11 Participants n=7 Participants	26 Participants n=5 Participants
Ethnicity (NIH/OMB) Hispanic or Latino	2 Participants n=5 Participants	0 Participants n=7 Participants	2 Participants n=5 Participants
Ethnicity (NIH/OMB) Not Hispanic or Latino	50 Participants n=5 Participants	52 Participants n=7 Participants	102 Participants n=5 Participants
Ethnicity (NIH/OMB) Unknown or Not Reported	0 Participants n=5 Participants	0 Participants n=7 Participants	0 Participants n=5 Participants
Race (NIH/OMB) American Indian or Alaska Native	0 Participants n=5 Participants	0 Participants n=7 Participants	0 Participants n=5 Participants
Race (NIH/OMB) Asian	6 Participants n=5 Participants	5 Participants n=7 Participants	11 Participants n=5 Participants
Race (NIH/OMB) Native Hawaiian or Other Pacific Islander	0 Participants n=5 Participants	0 Participants n=7 Participants	0 Participants n=5 Participants
Race (NIH/OMB) Black or African American	15 Participants n=5 Participants	21 Participants n=7 Participants	36 Participants n=5 Participants
Race (NIH/OMB) White	31 Participants n=5 Participants	26 Participants n=7 Participants	57 Participants n=5 Participants
Race (NIH/OMB) More than one race	0 Participants n=5 Participants	0 Participants n=7 Participants	0 Participants n=5 Participants
Race (NIH/OMB) Unknown or Not Reported	0 Participants n=5 Participants	0 Participants n=7 Participants	0 Participants n=5 Participants

PRIMARY outcome

Timeframe: Baseline (Day 0)

Population: A modified Intent-to-Treat (mITT) population included all randomized participants who received at least one dose of study product and had at least one post-baseline efficacy measurement.

Evaporative air sensitivity was assessed on facial surfaces of eligible incisor,canine and pre-molar teeth by directing a one second application of air from standard dental syringe held perpendicular to tooth surface, approximately 1-2 millimeter (mm) coronal to the gingival margin from a distance of approximately 1 centimeter (cm).Participant response to the stimulus was evaluated using the Schiff sensitivity scale, an examiner-based index scored immediately following administration of the evaporative air stimulus.0=Does not respond to air stimulation;1=Responds to air stimulus but does not request discontinuation of stimulus;2=Responds to air stimulus and requests discontinuation or moves from stimulus;3=Responds to stimulus,considers stimulus to be painful, requests discontinuation of the stimulus. Score range 0-3; a decrease in Schiff sensitivity score indicates an improvement.Mean was calculated once by selecting two test teeth which were located in different quadrants of mouth.

Outcome measures

Measure	Test Dentifrice n=52 Participants Participants were instructed to apply a strip of dentifrice (a full brush head) containing 5 percent (%) weight by weight (w/w) potassium nitrate and 0.454% w/w stannous fluoride (1100 parts per million \[ppm\] fluoride). Participants brushed their two selected 'test teeth' first, followed by the whole mouth for at least one timed minute, twice daily (morning and evening), and were permitted to rinse with water post-brushing.	Control Dentifrice n=52 Participants Participants were instructed to apply a strip of dentifrice (a full brush head) containing 0.454% w/w stannous fluoride (1100 ppm fluoride). Participants brushed their two selected 'test teeth' first, followed by the whole mouth for at least one timed minute, twice daily (morning and evening), and were permitted to rinse with water post-brushing.
Mean Schiff Sensitivity Score (Average of the Two Selected Test Teeth) at Baseline (Day 0)	2.61 Score on a scale Standard Error 0.063	2.60 Score on a scale Standard Error 0.063

PRIMARY outcome

Timeframe: Day 3

Population: mITT population included all randomized participants who received at least one dose of study product and had at least one post-baseline efficacy measurement.

Evaporative air sensitivity was assessed on facial surfaces of eligible incisor,canine and pre-molar teeth by directing a one second application of air from a standard dental syringe held perpendicular to the tooth surface, approximately 1-2 mm coronal to the gingival margin, and from a distance of approximately 1 cm. Participant response to the stimulus was evaluated using the Schiff sensitivity scale, an examiner-based index scored immediately following administration of the evaporative air stimulus. 0=Does not respond to air stimulation;1=Responds to air stimulus but does not request discontinuation of stimulus;2=Responds to air stimulus and requests discontinuation or moves from stimulus;3=Responds to stimulus, considers stimulus to be painful, and requests discontinuation of the stimulus. Score range 0-3; a decrease in Schiff sensitivity score indicates an improvement. Mean was calculated once by selecting two test teeth which were located in different quadrants of mouth.

Outcome measures

Measure	Test Dentifrice n=52 Participants Participants were instructed to apply a strip of dentifrice (a full brush head) containing 5 percent (%) weight by weight (w/w) potassium nitrate and 0.454% w/w stannous fluoride (1100 parts per million \[ppm\] fluoride). Participants brushed their two selected 'test teeth' first, followed by the whole mouth for at least one timed minute, twice daily (morning and evening), and were permitted to rinse with water post-brushing.	Control Dentifrice n=52 Participants Participants were instructed to apply a strip of dentifrice (a full brush head) containing 0.454% w/w stannous fluoride (1100 ppm fluoride). Participants brushed their two selected 'test teeth' first, followed by the whole mouth for at least one timed minute, twice daily (morning and evening), and were permitted to rinse with water post-brushing.
Mean Schiff Sensitivity Score (Average of the Two Selected Test Teeth) at Day 3	1.19 Score on a scale Standard Error 0.104	1.46 Score on a scale Standard Error 0.104

PRIMARY outcome

Timeframe: Day 7

Population: mITT population included all randomized participants who received at least one dose of study product and had at least one post-baseline efficacy measurement.Here, number analyzed indicates participants with available data for this outcome measure.

Evaporative air sensitivity was assessed on facial surfaces of eligible incisor,canine and pre-molar teeth by directing a one second application of air from a standard dental syringe held perpendicular to the tooth surface, approximately 1-2 mm coronal to the gingival margin, and from a distance of approximately 1 cm. Participant response to the stimulus was evaluated using the Schiff sensitivity scale, an examiner-based index scored immediately following administration of the evaporative air stimulus. 0=Does not respond to air stimulation;1=Responds to air stimulus but does not request discontinuation of stimulus;2=Responds to air stimulus and requests discontinuation or moves from stimulus;3=Responds to stimulus, considers stimulus to be painful, and requests discontinuation of the stimulus. Score range 0-3; a decrease in Schiff sensitivity score indicates an improvement. Mean was calculated once by selecting two test teeth which were located in different quadrants of mouth.

Outcome measures

Measure	Test Dentifrice n=52 Participants Participants were instructed to apply a strip of dentifrice (a full brush head) containing 5 percent (%) weight by weight (w/w) potassium nitrate and 0.454% w/w stannous fluoride (1100 parts per million \[ppm\] fluoride). Participants brushed their two selected 'test teeth' first, followed by the whole mouth for at least one timed minute, twice daily (morning and evening), and were permitted to rinse with water post-brushing.	Control Dentifrice n=52 Participants Participants were instructed to apply a strip of dentifrice (a full brush head) containing 0.454% w/w stannous fluoride (1100 ppm fluoride). Participants brushed their two selected 'test teeth' first, followed by the whole mouth for at least one timed minute, twice daily (morning and evening), and were permitted to rinse with water post-brushing.
Mean Schiff Sensitivity Score (Average of the Two Selected Test Teeth) at Day 7	0.73 Score on a scale Standard Error 0.097	1.20 Score on a scale Standard Error 0.120

PRIMARY outcome

Timeframe: Day 14

Population: mITT population included all randomized participants who received at least one dose of study product and had at least one post-baseline efficacy measurement.Here, number analyzed indicates participants with available data for this outcome measure.

Evaporative air sensitivity was assessed on facial surfaces of eligible incisor,canine and pre-molar teeth by directing a one second application of air from a standard dental syringe held perpendicular to the tooth surface, approximately 1-2 mm coronal to the gingival margin, and from a distance of approximately 1 cm. Participant response to the stimulus was evaluated using the Schiff sensitivity scale, an examiner-based index scored immediately following administration of the evaporative air stimulus. 0=Does not respond to air stimulation;1=Responds to air stimulus but does not request discontinuation of stimulus;2=Responds to air stimulus and requests discontinuation or moves from stimulus;3=Responds to stimulus, considers stimulus to be painful, and requests discontinuation of the stimulus. Score range 0-3; a decrease in Schiff sensitivity score indicates an improvement. Mean was calculated once by selecting two test teeth which were located in different quadrants of mouth.

Outcome measures

Measure	Test Dentifrice n=52 Participants Participants were instructed to apply a strip of dentifrice (a full brush head) containing 5 percent (%) weight by weight (w/w) potassium nitrate and 0.454% w/w stannous fluoride (1100 parts per million \[ppm\] fluoride). Participants brushed their two selected 'test teeth' first, followed by the whole mouth for at least one timed minute, twice daily (morning and evening), and were permitted to rinse with water post-brushing.	Control Dentifrice n=52 Participants Participants were instructed to apply a strip of dentifrice (a full brush head) containing 0.454% w/w stannous fluoride (1100 ppm fluoride). Participants brushed their two selected 'test teeth' first, followed by the whole mouth for at least one timed minute, twice daily (morning and evening), and were permitted to rinse with water post-brushing.
Mean Schiff Sensitivity Score (Average of the Two Selected Test Teeth) at Day 14	0.52 Score on a scale Standard Error 0.085	1.07 Score on a scale Standard Error 0.134

PRIMARY outcome

Timeframe: Day 28

Population: mITT population included all randomized participants who received at least one dose of study product and had at least one post-baseline efficacy measurement.Here, number analyzed indicates participants with available data for this outcome measure.

Evaporative air sensitivity was assessed on facial surfaces of eligible incisor,canine and pre-molar teeth by directing a one second application of air from a standard dental syringe held perpendicular to the tooth surface, approximately 1-2 mm coronal to the gingival margin, and from a distance of approximately 1 cm. Participant response to the stimulus was evaluated using the Schiff sensitivity scale, an examiner-based index scored immediately following administration of the evaporative air stimulus. 0=Does not respond to air stimulation;1=Responds to air stimulus but does not request discontinuation of stimulus;2=Responds to air stimulus and requests discontinuation or moves from stimulus;3=Responds to stimulus, considers stimulus to be painful, and requests discontinuation of the stimulus. Score range 0-3; a decrease in Schiff sensitivity score indicates an improvement. Mean was calculated once by selecting two test teeth which were located in different quadrants of mouth.

Outcome measures

Measure	Test Dentifrice n=52 Participants Participants were instructed to apply a strip of dentifrice (a full brush head) containing 5 percent (%) weight by weight (w/w) potassium nitrate and 0.454% w/w stannous fluoride (1100 parts per million \[ppm\] fluoride). Participants brushed their two selected 'test teeth' first, followed by the whole mouth for at least one timed minute, twice daily (morning and evening), and were permitted to rinse with water post-brushing.	Control Dentifrice n=52 Participants Participants were instructed to apply a strip of dentifrice (a full brush head) containing 0.454% w/w stannous fluoride (1100 ppm fluoride). Participants brushed their two selected 'test teeth' first, followed by the whole mouth for at least one timed minute, twice daily (morning and evening), and were permitted to rinse with water post-brushing.
Mean Schiff Sensitivity Score (Average of the Two Selected Test Teeth) at Day 28	0.32 Score on a scale Standard Error 0.087	0.75 Score on a scale Standard Error 0.121

PRIMARY outcome

Timeframe: Day 56

Population: mITT population included all randomized participants who received at least one dose of study product and had at least one post-baseline efficacy measurement.Here, number analyzed indicates participants with available data for this outcome measure.

Evaporative air sensitivity was assessed on facial surfaces of eligible incisor,canine and pre-molar teeth by directing a one second application of air from a standard dental syringe held perpendicular to the tooth surface, approximately 1-2 mm coronal to the gingival margin, and from a distance of approximately 1 cm. Participant response to the stimulus was evaluated using the Schiff sensitivity scale, an examiner-based index scored immediately following administration of the evaporative air stimulus. 0=Does not respond to air stimulation;1=Responds to air stimulus but does not request discontinuation of stimulus;2=Responds to air stimulus and requests discontinuation or moves from stimulus;3=Responds to stimulus, considers stimulus to be painful, and requests discontinuation of the stimulus. Score range 0-3; a decrease in Schiff sensitivity score indicates an improvement. Mean was calculated once by selecting two test teeth which were located in different quadrants of mouth.

Outcome measures

Measure	Test Dentifrice n=52 Participants Participants were instructed to apply a strip of dentifrice (a full brush head) containing 5 percent (%) weight by weight (w/w) potassium nitrate and 0.454% w/w stannous fluoride (1100 parts per million \[ppm\] fluoride). Participants brushed their two selected 'test teeth' first, followed by the whole mouth for at least one timed minute, twice daily (morning and evening), and were permitted to rinse with water post-brushing.	Control Dentifrice n=52 Participants Participants were instructed to apply a strip of dentifrice (a full brush head) containing 0.454% w/w stannous fluoride (1100 ppm fluoride). Participants brushed their two selected 'test teeth' first, followed by the whole mouth for at least one timed minute, twice daily (morning and evening), and were permitted to rinse with water post-brushing.
Mean Schiff Sensitivity Score (Average of the Two Selected Test Teeth) at Day 56	0.12 Score on a scale Standard Error 0.043	0.42 Score on a scale Standard Error 0.100

PRIMARY outcome

Timeframe: Baseline (Day 0)

Population: mITT population included all randomized participants who received at least one dose of study product and had at least one post-baseline efficacy measurement.

Tactile sensitivity was assessed for eligible incisor,canine and pre-molar teeth using a constant pressure probe (Yeaple probe),starting at 10 gram (g) and rising in increments of 10 g until the tactile threshold or maximum force for that visit is reached.The probe tip was placed perpendicular to the facial surface of tooth and drawn slowly across the exposed dentine.After each application,the participant was asked to indicate whether they experienced any pain or discomfort (yes/no response).The pressure setting at which participant gave two consecutive 'yes' responses was recorded as the tactile threshold (g).At Baseline, the maximum force was 20 g;at all subsequent visits, 80 g.If no sensitivity was found at the upper limit,the tactile threshold is recorded as greater than (>) 20 g (baseline) or >80 g (all other visits).An increase in tactile threshold indicates an improvement.Mean was calculated once by selecting two test teeth which were located in different quadrants of mouth.

Outcome measures

Measure	Test Dentifrice n=52 Participants Participants were instructed to apply a strip of dentifrice (a full brush head) containing 5 percent (%) weight by weight (w/w) potassium nitrate and 0.454% w/w stannous fluoride (1100 parts per million \[ppm\] fluoride). Participants brushed their two selected 'test teeth' first, followed by the whole mouth for at least one timed minute, twice daily (morning and evening), and were permitted to rinse with water post-brushing.	Control Dentifrice n=52 Participants Participants were instructed to apply a strip of dentifrice (a full brush head) containing 0.454% w/w stannous fluoride (1100 ppm fluoride). Participants brushed their two selected 'test teeth' first, followed by the whole mouth for at least one timed minute, twice daily (morning and evening), and were permitted to rinse with water post-brushing.
Mean Tactile Threshold (Average of the Two Selected Test Teeth) at Baseline (Day 0)	11.06 Grams Standard Error 0.372	12.31 Grams Standard Error 0.574

PRIMARY outcome

Timeframe: Day 3

Population: mITT population included all randomized participants who received at least one dose of study product and had at least one post-baseline efficacy measurement.

Tactile sensitivity was assessed for eligible incisor, canine and pre-molar teeth using a constant pressure probe (Yeaple probe),starting at 10 g and rising in increments of 10 g until the tactile threshold or maximum force for that visit is reached. The probe tip was placed perpendicular to the facial surface of tooth and drawn slowly across the exposed dentine.After each application, the participant was asked to indicate whether they experienced any pain or discomfort (yes/no response). The pressure setting at which the participant gave two consecutive 'yes' responses was recorded as the tactile threshold (g). At Baseline,the maximum force is 20 g; at all subsequent visits, 80 g. If no sensitivity was found at the upper limit,the tactile threshold is recorded as greater than (>) 20 g (baseline) or >80 g (all other visits). An increase in tactile threshold indicates an improvement.Mean was calculated once by selecting two test teeth which were located in different quadrants of mouth.

Outcome measures

Measure	Test Dentifrice n=52 Participants Participants were instructed to apply a strip of dentifrice (a full brush head) containing 5 percent (%) weight by weight (w/w) potassium nitrate and 0.454% w/w stannous fluoride (1100 parts per million \[ppm\] fluoride). Participants brushed their two selected 'test teeth' first, followed by the whole mouth for at least one timed minute, twice daily (morning and evening), and were permitted to rinse with water post-brushing.	Control Dentifrice n=52 Participants Participants were instructed to apply a strip of dentifrice (a full brush head) containing 0.454% w/w stannous fluoride (1100 ppm fluoride). Participants brushed their two selected 'test teeth' first, followed by the whole mouth for at least one timed minute, twice daily (morning and evening), and were permitted to rinse with water post-brushing.
Mean Tactile Threshold (Average of the Two Selected Test Teeth) at Day 3	31.35 Grams Standard Error 2.087	27.98 Grams Standard Error 2.061

PRIMARY outcome

Timeframe: Day 7

Population: mITT population included all randomized participants who received at least one dose of study product and had at least one post-baseline efficacy measurement.Here, number analyzed indicates participants with available data for this outcome measure.

Tactile sensitivity was assessed for eligible incisor, canine and pre-molar teeth using a constant pressure probe (Yeaple probe),starting at 10 g and rising in increments of 10 g until the tactile threshold or maximum force for that visit is reached. The probe tip was placed perpendicular to the facial surface of tooth and drawn slowly across the exposed dentine.After each application, the participant was asked to indicate whether they experienced any pain or discomfort (yes/no response). The pressure setting at which the participant gave two consecutive 'yes' responses was recorded as the tactile threshold (g). At Baseline,the maximum force is 20 g; at all subsequent visits, 80 g. If no sensitivity was found at the upper limit,the tactile threshold is recorded as greater than (>) 20 g (baseline) or >80 g (all other visits). An increase in tactile threshold indicates an improvement.Mean was calculated once by selecting two test teeth which were located in different quadrants of mouth.

Outcome measures

Measure	Test Dentifrice n=52 Participants Participants were instructed to apply a strip of dentifrice (a full brush head) containing 5 percent (%) weight by weight (w/w) potassium nitrate and 0.454% w/w stannous fluoride (1100 parts per million \[ppm\] fluoride). Participants brushed their two selected 'test teeth' first, followed by the whole mouth for at least one timed minute, twice daily (morning and evening), and were permitted to rinse with water post-brushing.	Control Dentifrice n=52 Participants Participants were instructed to apply a strip of dentifrice (a full brush head) containing 0.454% w/w stannous fluoride (1100 ppm fluoride). Participants brushed their two selected 'test teeth' first, followed by the whole mouth for at least one timed minute, twice daily (morning and evening), and were permitted to rinse with water post-brushing.
Mean Tactile Threshold (Average of the Two Selected Test Teeth) at Day 7	47.45 Grams Standard Error 3.075	38.75 Grams Standard Error 2.983

PRIMARY outcome

Timeframe: Day 14

Population: mITT population included all randomized participants who received at least one dose of study product and had at least one post-baseline efficacy measurement.Here, number analyzed indicates participants with available data for this outcome measure.

Tactile sensitivity was assessed for eligible incisor, canine and pre-molar teeth using a constant pressure probe (Yeaple probe),starting at 10 g and rising in increments of 10 g until the tactile threshold or maximum force for that visit is reached. The probe tip was placed perpendicular to the facial surface of tooth and drawn slowly across the exposed dentine.After each application, the participant was asked to indicate whether they experienced any pain or discomfort (yes/no response). The pressure setting at which the participant gave two consecutive 'yes' responses was recorded as the tactile threshold (g). At Baseline,the maximum force is 20 g; at all subsequent visits, 80 g. If no sensitivity was found at the upper limit,the tactile threshold is recorded as greater than (>) 20 g (baseline) or >80 g (all other visits). An increase in tactile threshold indicates an improvement.Mean was calculated once by selecting two test teeth which were located in different quadrants of mouth.

Outcome measures

Measure	Test Dentifrice n=52 Participants Participants were instructed to apply a strip of dentifrice (a full brush head) containing 5 percent (%) weight by weight (w/w) potassium nitrate and 0.454% w/w stannous fluoride (1100 parts per million \[ppm\] fluoride). Participants brushed their two selected 'test teeth' first, followed by the whole mouth for at least one timed minute, twice daily (morning and evening), and were permitted to rinse with water post-brushing.	Control Dentifrice n=52 Participants Participants were instructed to apply a strip of dentifrice (a full brush head) containing 0.454% w/w stannous fluoride (1100 ppm fluoride). Participants brushed their two selected 'test teeth' first, followed by the whole mouth for at least one timed minute, twice daily (morning and evening), and were permitted to rinse with water post-brushing.
Mean Tactile Threshold (Average of the Two Selected Test Teeth) at Day 14	60.59 Grams Standard Error 3.271	48.53 Grams Standard Error 3.549

PRIMARY outcome

Timeframe: Day 28

Population: mITT population included all randomized participants who received at least one dose of study product and had at least one post-baseline efficacy measurement.Here, number analyzed indicates participants with available data for this outcome measure.

Tactile sensitivity was assessed for eligible incisor, canine and pre-molar teeth using a constant pressure probe (Yeaple probe),starting at 10 g and rising in increments of 10 g until the tactile threshold or maximum force for that visit is reached. The probe tip was placed perpendicular to the facial surface of tooth and drawn slowly across the exposed dentine.After each application, the participant was asked to indicate whether they experienced any pain or discomfort (yes/no response). The pressure setting at which the participant gave two consecutive 'yes' responses was recorded as the tactile threshold (g). At Baseline,the maximum force is 20 g; at all subsequent visits, 80 g. If no sensitivity was found at the upper limit,the tactile threshold is recorded as greater than (>) 20 g (baseline) or >80 g (all other visits). An increase in tactile threshold indicates an improvement.Mean was calculated once by selecting two test teeth which were located in different quadrants of mouth.

Outcome measures

Measure	Test Dentifrice n=52 Participants Participants were instructed to apply a strip of dentifrice (a full brush head) containing 5 percent (%) weight by weight (w/w) potassium nitrate and 0.454% w/w stannous fluoride (1100 parts per million \[ppm\] fluoride). Participants brushed their two selected 'test teeth' first, followed by the whole mouth for at least one timed minute, twice daily (morning and evening), and were permitted to rinse with water post-brushing.	Control Dentifrice n=52 Participants Participants were instructed to apply a strip of dentifrice (a full brush head) containing 0.454% w/w stannous fluoride (1100 ppm fluoride). Participants brushed their two selected 'test teeth' first, followed by the whole mouth for at least one timed minute, twice daily (morning and evening), and were permitted to rinse with water post-brushing.
Mean Tactile Threshold (Average of the Two Selected Test Teeth) at Day 28	71.67 Grams Standard Error 3.044	57.94 Grams Standard Error 4.076

PRIMARY outcome

Timeframe: Day 56

Population: mITT population included all randomized participants who received at least one dose of study product and had at least one post-baseline efficacy measurement.Here, number analyzed indicates participants with available data for this outcome measure.

Tactile sensitivity was assessed for eligible incisor, canine and pre-molar teeth using a constant pressure probe (Yeaple probe),starting at 10 g and rising in increments of 10 g until the tactile threshold or maximum force for that visit is reached. The probe tip was placed perpendicular to the facial surface of tooth and drawn slowly across the exposed dentine.After each application, the participant was asked to indicate whether they experienced any pain or discomfort (yes/no response). The pressure setting at which the participant gave two consecutive 'yes' responses was recorded as the tactile threshold (g). At Baseline,the maximum force is 20 g; at all subsequent visits, 80 g. If no sensitivity was found at the upper limit,the tactile threshold is recorded as greater than (>) 20 g (baseline) or >80 g (all other visits). An increase in tactile threshold indicates an improvement.Mean was calculated once by selecting two test teeth which were located in different quadrants of mouth.

Outcome measures

Measure	Test Dentifrice n=52 Participants Participants were instructed to apply a strip of dentifrice (a full brush head) containing 5 percent (%) weight by weight (w/w) potassium nitrate and 0.454% w/w stannous fluoride (1100 parts per million \[ppm\] fluoride). Participants brushed their two selected 'test teeth' first, followed by the whole mouth for at least one timed minute, twice daily (morning and evening), and were permitted to rinse with water post-brushing.	Control Dentifrice n=52 Participants Participants were instructed to apply a strip of dentifrice (a full brush head) containing 0.454% w/w stannous fluoride (1100 ppm fluoride). Participants brushed their two selected 'test teeth' first, followed by the whole mouth for at least one timed minute, twice daily (morning and evening), and were permitted to rinse with water post-brushing.
Mean Tactile Threshold (Average of the Two Selected Test Teeth) at Day 56	79.71 Grams Standard Error 2.390	64.80 Grams Standard Error 3.921

PRIMARY outcome

Timeframe: Baseline (Day 0)

Population: mITT population included all randomized participants who received at least one dose of study product and had at least one post-baseline efficacy measurement.

Number of eligible teeth were identified at screening with Schiff sensitivity score of >=1 (Schiff sensitivity scale: 0=Participant does not respond to air stimulation; 1=Participant responds to air stimulus but does not request discontinuation of stimulus; 2=Participant responds to air stimulus and requests discontinuation or moves from stimulus; 3=Participant responds to stimulus, considers stimulus to be painful, and requests discontinuation of the stimulus). A decrease in the number of sensitive teeth indicates an improvement.

Outcome measures

Measure	Test Dentifrice n=52 Participants Participants were instructed to apply a strip of dentifrice (a full brush head) containing 5 percent (%) weight by weight (w/w) potassium nitrate and 0.454% w/w stannous fluoride (1100 parts per million \[ppm\] fluoride). Participants brushed their two selected 'test teeth' first, followed by the whole mouth for at least one timed minute, twice daily (morning and evening), and were permitted to rinse with water post-brushing.	Control Dentifrice n=52 Participants Participants were instructed to apply a strip of dentifrice (a full brush head) containing 0.454% w/w stannous fluoride (1100 ppm fluoride). Participants brushed their two selected 'test teeth' first, followed by the whole mouth for at least one timed minute, twice daily (morning and evening), and were permitted to rinse with water post-brushing.
Number of Sensitive Teeth (Schiff Sensitivity Score Greater Than or Equal to [>=] 1) on Day 0 (Baseline)	3.1 Number of sensitive teeth Standard Error 0.14	3.2 Number of sensitive teeth Standard Error 0.15

PRIMARY outcome

Timeframe: Day 3

Population: mITT population included all randomized participants who received at least one dose of study product and had at least one post-baseline efficacy measurement.

Number of eligible teeth were identified at screening with Schiff sensitivity score of >=1 (Schiff sensitivity scale: 0=Participant does not respond to air stimulation; 1=Participant responds to air stimulus but does not request discontinuation of stimulus; 2=Participant responds to air stimulus and requests discontinuation or moves from stimulus; 3=Participant responds to stimulus, considers stimulus to be painful, and requests discontinuation of the stimulus). A decrease in the number of sensitive teeth indicates an improvement.

Outcome measures

Measure	Test Dentifrice n=52 Participants Participants were instructed to apply a strip of dentifrice (a full brush head) containing 5 percent (%) weight by weight (w/w) potassium nitrate and 0.454% w/w stannous fluoride (1100 parts per million \[ppm\] fluoride). Participants brushed their two selected 'test teeth' first, followed by the whole mouth for at least one timed minute, twice daily (morning and evening), and were permitted to rinse with water post-brushing.	Control Dentifrice n=52 Participants Participants were instructed to apply a strip of dentifrice (a full brush head) containing 0.454% w/w stannous fluoride (1100 ppm fluoride). Participants brushed their two selected 'test teeth' first, followed by the whole mouth for at least one timed minute, twice daily (morning and evening), and were permitted to rinse with water post-brushing.
Number of Sensitive Teeth (Schiff Sensitivity Score >= 1) on Day 3	3.6 Number of Sensitive Teeth Standard Error 0.20	3.6 Number of Sensitive Teeth Standard Error 0.22

PRIMARY outcome

Timeframe: Day 7

Population: mITT population included all randomized participants who received at least one dose of study product and had at least one post-baseline efficacy measurement.Here, number analyzed indicates participants with available data for this outcome measure.

Number of eligible teeth were identified at screening with Schiff sensitivity score of >=1 (Schiff sensitivity scale: 0=Participant does not respond to air stimulation; 1=Participant responds to air stimulus but does not request discontinuation of stimulus; 2=Participant responds to air stimulus and requests discontinuation or moves from stimulus; 3=Participant responds to stimulus, considers stimulus to be painful, and requests discontinuation of the stimulus). A decrease in the number of sensitive teeth indicates an improvement.

Outcome measures

Measure	Test Dentifrice n=52 Participants Participants were instructed to apply a strip of dentifrice (a full brush head) containing 5 percent (%) weight by weight (w/w) potassium nitrate and 0.454% w/w stannous fluoride (1100 parts per million \[ppm\] fluoride). Participants brushed their two selected 'test teeth' first, followed by the whole mouth for at least one timed minute, twice daily (morning and evening), and were permitted to rinse with water post-brushing.	Control Dentifrice n=52 Participants Participants were instructed to apply a strip of dentifrice (a full brush head) containing 0.454% w/w stannous fluoride (1100 ppm fluoride). Participants brushed their two selected 'test teeth' first, followed by the whole mouth for at least one timed minute, twice daily (morning and evening), and were permitted to rinse with water post-brushing.
Number of Sensitive Teeth (Schiff Sensitivity Score >= 1) on Day 7	2.2 Number of Sensitive teeth Standard Error 0.26	3.2 Number of Sensitive teeth Standard Error 0.26

PRIMARY outcome

Timeframe: Day 14

Population: mITT population included all randomized participants who received at least one dose of study product and had at least one post-baseline efficacy measurement.Here, number analyzed indicates participants with available data for this outcome measure.

Number of eligible teeth were identified at screening with Schiff sensitivity score of >=1 (Schiff sensitivity scale: 0=Participant does not respond to air stimulation; 1=Participant responds to air stimulus but does not request discontinuation of stimulus; 2=Participant responds to air stimulus and requests discontinuation or moves from stimulus; 3=Participant responds to stimulus, considers stimulus to be painful, and requests discontinuation of the stimulus). A decrease in the number of sensitive teeth indicates an improvement.

Outcome measures

Measure	Test Dentifrice n=52 Participants Participants were instructed to apply a strip of dentifrice (a full brush head) containing 5 percent (%) weight by weight (w/w) potassium nitrate and 0.454% w/w stannous fluoride (1100 parts per million \[ppm\] fluoride). Participants brushed their two selected 'test teeth' first, followed by the whole mouth for at least one timed minute, twice daily (morning and evening), and were permitted to rinse with water post-brushing.	Control Dentifrice n=52 Participants Participants were instructed to apply a strip of dentifrice (a full brush head) containing 0.454% w/w stannous fluoride (1100 ppm fluoride). Participants brushed their two selected 'test teeth' first, followed by the whole mouth for at least one timed minute, twice daily (morning and evening), and were permitted to rinse with water post-brushing.
Number of Sensitive Teeth (Schiff Sensitivity Score >= 1) on Day 14	1.7 Number of Sensitive teeth Standard Error 0.24	2.8 Number of Sensitive teeth Standard Error 0.29

PRIMARY outcome

Timeframe: Day 28

Population: mITT population included all randomized participants who received at least one dose of study product and had at least one post-baseline efficacy measurement.Here, number analyzed indicates participants with available data for this outcome measure.

Number of eligible teeth were identified at screening with Schiff sensitivity score of >=1 (Schiff sensitivity scale: 0=Participant does not respond to air stimulation; 1=Participant responds to air stimulus but does not request discontinuation of stimulus; 2=Participant responds to air stimulus and requests discontinuation or moves from stimulus; 3=Participant responds to stimulus, considers stimulus to be painful, and requests discontinuation of the stimulus). A decrease in the number of sensitive teeth indicates an improvement.

Outcome measures

Measure	Test Dentifrice n=52 Participants Participants were instructed to apply a strip of dentifrice (a full brush head) containing 5 percent (%) weight by weight (w/w) potassium nitrate and 0.454% w/w stannous fluoride (1100 parts per million \[ppm\] fluoride). Participants brushed their two selected 'test teeth' first, followed by the whole mouth for at least one timed minute, twice daily (morning and evening), and were permitted to rinse with water post-brushing.	Control Dentifrice n=52 Participants Participants were instructed to apply a strip of dentifrice (a full brush head) containing 0.454% w/w stannous fluoride (1100 ppm fluoride). Participants brushed their two selected 'test teeth' first, followed by the whole mouth for at least one timed minute, twice daily (morning and evening), and were permitted to rinse with water post-brushing.
Number of Sensitive Teeth (Schiff Sensitivity Score >= 1) on Day 28	1.0 Number of Sensitive teeth Standard Error 0.23	2.1 Number of Sensitive teeth Standard Error 0.30

PRIMARY outcome

Timeframe: Day 56

Population: mITT population included all randomized participants who received at least one dose of study product and had at least one post-baseline efficacy measurement.Here, number analyzed indicates participants with available data for this outcome measure.

Number of eligible teeth were identified at screening with Schiff sensitivity score of >=1 (Schiff sensitivity scale: 0=Participant does not respond to air stimulation; 1=Participant responds to air stimulus but does not request discontinuation of stimulus; 2=Participant responds to air stimulus and requests discontinuation or moves from stimulus; 3=Participant responds to stimulus, considers stimulus to be painful, and requests discontinuation of the stimulus). A decrease in the number of sensitive teeth indicates an improvement.

Outcome measures

Measure	Test Dentifrice n=52 Participants Participants were instructed to apply a strip of dentifrice (a full brush head) containing 5 percent (%) weight by weight (w/w) potassium nitrate and 0.454% w/w stannous fluoride (1100 parts per million \[ppm\] fluoride). Participants brushed their two selected 'test teeth' first, followed by the whole mouth for at least one timed minute, twice daily (morning and evening), and were permitted to rinse with water post-brushing.	Control Dentifrice n=52 Participants Participants were instructed to apply a strip of dentifrice (a full brush head) containing 0.454% w/w stannous fluoride (1100 ppm fluoride). Participants brushed their two selected 'test teeth' first, followed by the whole mouth for at least one timed minute, twice daily (morning and evening), and were permitted to rinse with water post-brushing.
Number of Sensitive Teeth (Schiff Sensitivity Score >= 1) on Day 56	0.5 Number of Sensitive teeth Standard Error 0.15	1.3 Number of Sensitive teeth Standard Error 0.25

SECONDARY outcome

Timeframe: Baseline (Day 0), Day 56

Population: mITT population included all randomized participants who received at least one dose of study product and had at least one post-baseline efficacy measurement.Here, number analyzed indicates participants with available data for this outcome measure.

Evaporative air sensitivity was assessed on the facial surfaces of teeth by directing one second application of air from dental syringe held perpendicular to tooth surface, approximately 1-2 mm coronal to gingival margin and from a distance of approximately 1 cm. Participant response to stimulus was evaluated using Schiff sensitivity scale following administration of the evaporative air stimulus.0=Does not respond to air stimulation;1=Responds to air stimulus but does not request discontinuation of stimulus;2=Responds to air stimulus and requests discontinuation or moves from stimulus;3=Responds to stimulus, considers stimulus to be painful, requests discontinuation of stimulus. Score range 0-3;a decrease in Schiff sensitivity score indicates improvement. Adjusted mean change from baseline are derived from analysis of covariance (ANCOVA) model which included treatment as a factor and baseline Schiff sensitivity score as a covariate with change from baseline as dependent variable.

Outcome measures

Measure	Test Dentifrice n=52 Participants Participants were instructed to apply a strip of dentifrice (a full brush head) containing 5 percent (%) weight by weight (w/w) potassium nitrate and 0.454% w/w stannous fluoride (1100 parts per million \[ppm\] fluoride). Participants brushed their two selected 'test teeth' first, followed by the whole mouth for at least one timed minute, twice daily (morning and evening), and were permitted to rinse with water post-brushing.	Control Dentifrice n=52 Participants Participants were instructed to apply a strip of dentifrice (a full brush head) containing 0.454% w/w stannous fluoride (1100 ppm fluoride). Participants brushed their two selected 'test teeth' first, followed by the whole mouth for at least one timed minute, twice daily (morning and evening), and were permitted to rinse with water post-brushing.
Change From Baseline in Schiff Sensitivity Score at Day 56	-2.48 Score on a scale Standard Error 0.073	-2.17 Score on a scale Standard Error 0.073

SECONDARY outcome

Timeframe: Baseline (Day 0), Day 56

Population: mITT population included all randomized participants who received at least one dose of study product and had at least one post-baseline efficacy measurement.Here, number analyzed indicates participants with available data for this outcome measure.

Tactile sensitivity was assessed for eligible teeth using constant pressure probe (Yeaple probe),starting at 10 g and rising in increments of 10 g until tactile threshold for that visit is reached. The probe tip was placed perpendicular to facial surface of tooth and drawn slowly across exposed dentine. After each application, participant was asked whether they experienced any pain or discomfort (yes/no response).The pressure setting at which participant gives two consecutive 'yes' responses was recorded as the tactile threshold (g).At Baseline, the maximum force was 20g;at all subsequent visits,80g.If no sensitivity was found at the upper limit, the tactile threshold was recorded as >20 g (Baseline) or >80 g (all other visits).An increase in tactile threshold indicates an improvement. Adjusted mean change from baseline are derived from ANCOVA model which included treatment as factor and baseline tactile senstivity as covariate with change from baseline as dependent variable.

Outcome measures

Measure	Test Dentifrice n=52 Participants Participants were instructed to apply a strip of dentifrice (a full brush head) containing 5 percent (%) weight by weight (w/w) potassium nitrate and 0.454% w/w stannous fluoride (1100 parts per million \[ppm\] fluoride). Participants brushed their two selected 'test teeth' first, followed by the whole mouth for at least one timed minute, twice daily (morning and evening), and were permitted to rinse with water post-brushing.	Control Dentifrice n=52 Participants Participants were instructed to apply a strip of dentifrice (a full brush head) containing 0.454% w/w stannous fluoride (1100 ppm fluoride). Participants brushed their two selected 'test teeth' first, followed by the whole mouth for at least one timed minute, twice daily (morning and evening), and were permitted to rinse with water post-brushing.
Change From Baseline (Day 0) in Tactile Threshold on Day 56	69.34 Grams Standard Error 3.067	51.94 Grams Standard Error 3.067

Adverse Events

Test Dentifrice

Serious events: 0 serious events

Other events: 2 other events

Deaths: 0 deaths

Control Dentifrice

Serious events: 0 serious events

Other events: 1 other events

Deaths: 0 deaths

Serious adverse events

Adverse event data not reported

Other adverse events

Measure	Test Dentifrice n=52 participants at risk Participants were instructed to apply a strip of dentifrice (a full brush head) containing 5 percent (%) weight by weight (w/w) potassium nitrate and 0.454% w/w stannous fluoride (1100 parts per million \[ppm\] fluoride). Participants brushed their two selected 'test teeth' first, followed by the whole mouth for at least one timed minute, twice daily (morning and evening), and were permitted to rinse with water post-brushing.Participants received test dentifrice via a manual toothbrush throughout the study duration (8 weeks i.e. till Day 56) twice daily.	Control Dentifrice n=52 participants at risk Participants were instructed to apply a strip of dentifrice (a full brush head) containing 0.454% w/w stannous fluoride (1100 ppm fluoride). Participants brushed their two selected 'test teeth' first, followed by the whole mouth for at least one timed minute, twice daily (morning and evening), and were permitted to rinse with water post-brushing. Participants received control dentifrice via a manual toothbrush throughout the study duration (8 weeks i.e. till Day 56) twice daily.
Gastrointestinal disorders Oral mucosal exfoliation	3.8% 2/52 • Number of events 2 • From screening up to Day 56 Safety population: all participants who were eligible to participate in the study and received at least one dose of study medication. All adverse events (AEs) were summarized by system organ class and preferred term. All treatment emergent AEs and serious adverse events (SAEs) were collected and reported. A participant with multiple occurrences of AEs counted once in AE category. A participant with multiple AEs within a primary system organ class was counted once in system organ class.	0.00% 0/52 • From screening up to Day 56 Safety population: all participants who were eligible to participate in the study and received at least one dose of study medication. All adverse events (AEs) were summarized by system organ class and preferred term. All treatment emergent AEs and serious adverse events (SAEs) were collected and reported. A participant with multiple occurrences of AEs counted once in AE category. A participant with multiple AEs within a primary system organ class was counted once in system organ class.
Injury, poisoning and procedural complications Mouth injury	0.00% 0/52 • From screening up to Day 56 Safety population: all participants who were eligible to participate in the study and received at least one dose of study medication. All adverse events (AEs) were summarized by system organ class and preferred term. All treatment emergent AEs and serious adverse events (SAEs) were collected and reported. A participant with multiple occurrences of AEs counted once in AE category. A participant with multiple AEs within a primary system organ class was counted once in system organ class.	1.9% 1/52 • Number of events 1 • From screening up to Day 56 Safety population: all participants who were eligible to participate in the study and received at least one dose of study medication. All adverse events (AEs) were summarized by system organ class and preferred term. All treatment emergent AEs and serious adverse events (SAEs) were collected and reported. A participant with multiple occurrences of AEs counted once in AE category. A participant with multiple AEs within a primary system organ class was counted once in system organ class.

Additional Information

GSK Response Center

GlaxoSmithKline

Phone: 866-435-7343

Email: GSKClinicalSupportHD@gsk.com

Results disclosure agreements

• Principal investigator is a sponsor employee GSK agreements may vary with individual investigators but will not prohibit any investigator from publishing. GSK supports the publication of results from all centers of a multi-center trial but requests that reports based on single-site data not precede the primary publication of the entire clinical trial.
• Publication restrictions are in place

Restriction type: OTHER