The Influence of the Crown-implant Ratio on the Crestal Bone Level and Implant Secondary Stability

Study Results

Results pending

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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Recruitment Status

COMPLETED

Clinical Phase

NA

Total Enrollment

30 participants

Study Classification

INTERVENTIONAL

Study Start Date

2012-01-01

Study Completion Date

2016-01-01

Brief Summary

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The aim of the study was to determine whether implant length and the crown-to-implant (C/I) ratio influence implant stability and the loss of the surrounding marginal bone, and whether short implants can be used instead of sinus augmentation procedures.

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Detailed Description

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The patients participating in the study (n=30) had one single tooth implant - a short (OsseoSpeed™ L6Ø4 mm, Implants) or a regular implant (OsseoSpeed™ L11 and L13Ø4 mm, DENTSPLY Implants) - placed in the maxilla. The evaluation was based on clinical and radiological examination.

The crown-to-implant ratio was determined by dividing the length of the crown together with the abutment by the length of the implant placed crestally. Mean crown-to-implant ratios were calculated separately for each group and its correlation with the MBL (marginal bone loss) and stability was assessed. The authors compared the correlation between the C/I ratio values, MBL and secondary implant stability.

Conditions

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Partial Edentulism Tooth Loss

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

TREATMENT

Blinding Strategy

SINGLE

Participants

Study Groups

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Short implants Treatment

Group 2 (G2; n=15 patients) had short implants (OsseoSpeed ™ L6mm Ø4 mm) \[DENTSPLY Implants, Waltham, MA, USA\] placed without sinus lift and augmentation procedure.

Group Type EXPERIMENTAL

Short implants Treatment

Intervention Type OTHER

Short implants are placed in the alveolar bone and a clinical Ostell and Periotest evaluation of the implants after a period of time is done. Analysis of periapical radiographs and CBCT images after a period of time. Bone around the implant was measured, marginal bone level loss is determined.

Regular Implants Treatment

Group 1 (G1; n=15 patients) had conventional dental implants (OsseoSpeed ™ L11 Ø4 mm and L13 Ø4 mm) \[DENTSPLY Implants, Waltham, MA, USA\] placed, preceded by the sinus lift procedure from a lateral window approach with the application of the xenogeneic bone graft Geistlich Bio-Oss® \[Geistlich AG, Wolhusen, Switzerland\]. The lateral window approach sinus lift surgery was performed 6 weeks prior to the implant placement by the same surgeon.

Group Type ACTIVE_COMPARATOR

Regular implants Treatment

Intervention Type OTHER

Sinus lift procedure is done and regular implants are placed in the alveolar bone and a clinical Ostell and Periotest evaluation of the implants after a period of time is done. Analysis of periapical radiographs and CBCT images after a period of time. Bone around the implant was measured, marginal bone level loss is determined.

Interventions

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Short implants Treatment

Short implants are placed in the alveolar bone and a clinical Ostell and Periotest evaluation of the implants after a period of time is done. Analysis of periapical radiographs and CBCT images after a period of time. Bone around the implant was measured, marginal bone level loss is determined.

Intervention Type OTHER

Regular implants Treatment

Sinus lift procedure is done and regular implants are placed in the alveolar bone and a clinical Ostell and Periotest evaluation of the implants after a period of time is done. Analysis of periapical radiographs and CBCT images after a period of time. Bone around the implant was measured, marginal bone level loss is determined.

Intervention Type OTHER

Eligibility Criteria

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Inclusion Criteria

* Non-smoking patients with no systemic or local diseases were qualified.

* minimal apicocoronal height of the alveolar ridge of 6 mm in the region of the implant insertion in the pre-surgical qualification
* minimal width of the alveolar ridge of 6-7 mm in the region of interest
* HKT (height of the keratinized tissue) higher than 2 mm
* API ≤ 35 (Approximal Plaque Index)
* PI ≤ 25. (Plaque Index)
* Bone Type III or D2 were included in the study
* No graft procedures in the area of interest,