Occlusal Bite Force Changes After Surgical Correction of the Increased Vertical Dimension
NCT ID: NCT04376645
Last Updated: 2020-05-06
Study Results
The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.
Basic Information
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COMPLETED
NA
40 participants
INTERVENTIONAL
2018-09-01
2019-12-31
Brief Summary
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Detailed Description
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Patients were allocated into one of 2 groups as follows: - Group 1: - Class III patients with increased vertical relationship Included 22 patients (8 males, 14 females).These patients were scheduled for bimaxillary surgical procedures (Maxillary advancement and mandibular setback with posterior maxillary impaction) to correct the antero-posterior and vertical skeletal discrepancies.
Group 2: - Class III subjects with normal vertical relationship Included 20 patients (8 males, 12 females).These patients were scheduled for mandibular setback surgical procedure (with no posterior maxillary impaction) to correct the antero-posterior skeletal discrepancy.
Diagnostic records (orthopantomogram, lateral cephalogram, study casts, clinical photographs) were taken for all subjects before surgery. The same records were taken post surgery just before fixed orthodontic appliance debond.
The included patients were treated by orthodontic teaching staff and postgraduate residents at orthodontic clinics/JUST using pre-adjusted edgewise fixed appliance (3M Gemini Uniteks, 0.022" MBT prescription brackets).
Bite force was measured bilaterally in the first molar region using a portable occlusal force gauge (GM10, Nagano Keiki, Tokyo, Japan), that consisted of a hydraulic pressure gauge and a biting element made of a vinyl material encased in a polyethylene tube. 3 OBF measurements were recorded on each side and incisally with a 15 second rest between each bite, the average of the three readings was used. Three OBF measurements were considered in the analysis: the maximum OBF (MOBF) achieved by the subject, the averaged OBF on molars (AOBF), and the OBF at the incisal region (IOBF).
Number of teeth in contact was measured using double-sided articulation paper strips that was smeared with a thin layer of petroleum jelly prior to its' use so as to improve the visualization of the markings of the contact points that existed in a subject's intercuspal position.
Conditions
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Study Design
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NON_RANDOMIZED
PARALLEL
TREATMENT
NONE
Study Groups
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Group 1
Group 1: - Class III patients with increased vertical relationship These patients were scheduled for bimaxillary surgical procedures (Maxillary advancement and mandibular setback with posterior maxillary impaction) to correct the antero-posterior and vertical skeletal discrepancies.
Mandibular Setback with maxillary impaction
Occlusal bite force will be measured after surgery to correct vertical disproportions
Group 2
Group 2: - Class III subjects with normal vertical relationship These patients were scheduled for mandibular setback surgical procedure (with no posterior maxillary impaction) to correct the antero-posterior skeletal discrepancy.
Mandibular setback only
Occlusal bite force will be measured after surgery without changing vertical disproportions.
Interventions
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Mandibular Setback with maxillary impaction
Occlusal bite force will be measured after surgery to correct vertical disproportions
Mandibular setback only
Occlusal bite force will be measured after surgery without changing vertical disproportions.
Eligibility Criteria
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Inclusion Criteria
* severe skeletal class III malocclusion
* patients willing to undergo surgery
* no systematic medical conditions
Exclusion Criteria
* heavily restored or endodontically treated first molars
18 Years
30 Years
ALL
Yes
Sponsors
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Jordan University of Science and Technology
OTHER
Responsible Party
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Elham Abu Alhaija
Professor
Principal Investigators
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Elham Abu Alhaija, PhD
Role: PRINCIPAL_INVESTIGATOR
Jordan University of Science and Technology
Locations
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Faculty of Dentistry/Jordan University of Science and Technology Dental Teaching Clinics
Irbid, , Jordan
Countries
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Other Identifiers
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44/2018
Identifier Type: -
Identifier Source: org_study_id
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