Different Implant Positions for Implant Retained Mandibular Overdenture

Study Overview
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Brief Summary
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This study will aim to evaluate the effect of two different implant positions, lateral incisors, and canine areas, on anterior and posterior ridge resorption and bone remodeling after different periods of denture insertion.

Detailed Description
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Twelve patients will be recruited from a previous study (14), having two-implant mandibular overdentures. Patients recalled from the database set of the clinic of the Removable Prosthodontic Department, Faculty of Dentistry, Mansoura University. The patients will be grouped based on the position of the two implants. All patients will be informed about all prosthetic procedures that will be done. Also, they will sign the consent form of the ethical committee of the faculty of dentistry, at Mansoura University. All selected patients with the following criteria: mandibular two implants retained overdenture opposing complete edentulous maxillary arch, attended the previous follow-up recalls with previous CBCT examination. Patients who didn't attend previous follow-up recalls, didn't perform radiographic follow-up, or had para-functional habits will excluded from the study Patients will be divided into two groups Group A (6 patients): Patients having two mandibular implants in lateral incisor positions. Group B (6 patients): Patients having two mandibular implants in canine positions.

Official Title
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Retrospective Study on the Effect of Different Implant Positions for Implant Retained Mandibular Overdenture: Radiographic Evaluation of the Circumferential Bone Level and Bone Remodeling in the Anterior and Posterior Mandible

Conditions
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Bone Loss

Intervention / Treatment
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* Other: over-denture


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Patients with mandibular two implants retained overdenture opposing complete edentulous maxillary arch, attended the previous follow-up recalls with previous CBCT examination. Exclusion Criteria: Patients who didn't attend previous follow-up recalls, didn't perform radiographic follow-up, or had para-functional habits will be excluded from the study.

Ages Eligible for Study
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Minimum Age: 50 Years
Maximum Age: 70 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Active Comparator: lateral incisor group<br>Patients having two mandibular implants in lateral incisor positions. | Other: over-denture<br>* implant retained overdenture prosthesis.<br>|
| Active Comparator: canine group<br>Patients having two mandibular implants in canine positions | Other: over-denture<br>* implant retained overdenture prosthesis.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| implant survival rate | index | 5 years | 
| circumferential bone loss | peri-implant bone changes in mm | 5 years | 
| posterior bone changes | bone loss in mm | 5 years | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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implant, overdenture