Bone Loss in Posterior Mandible Postextraction Sockets

Study Overview
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Brief Summary
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The aim of this study is to evaluate the bone loss after extraction. The surgery protocol is flapless, and the teeth are mandibular premolars or molars leaving sockets with 4 walls intact or at least 3 walls intact and the buccal wall at 80% . This study will include 40 patients

Detailed Description
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Primary objective : Estimate the percentage of bone volume loss o and the percentage thickness loss of the buccal and palatal cortical for patients who underwent natural healing in the mandibular molar and premolar areas. Methods : Before tooth extraction of a premolar or molar in mandibular area by flapless technique, a CBCT preoperative is performed to verify the integrity of cortical and measure the height and width of the residual cavity. Caliper measurements will also be performed during surgery in order to integrate also the thickness of the bone tables and gingival thickness. After natural healing , the pre-implant scan performed at six months postoperatively will measure the height and width of the grafted cell, to compare measurements and evaluate the dynamics of alveolar resorption.

Official Title
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Evolution of Bone Volume in the Mandibular Posterior Area After Natural Healing and Flapless Technique

Conditions
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Guided Bone

Participation Criteria
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Eligibility Criteria
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Inclusion criteria patients requiring tooth extraction aged 18 to 80 Patients showing no indication against-General to surgery Exclusion criteria Patient with against-indication for surgical treatment. Patients with an important loss of vestibular cortical Patients requiring and accepting a bone graft Unstabilized periodontal disease or aesthetic indication. Inability to maintain a good level of oral hygiene and good cooperation. Higher tobacco consumption has 10cig / day Acute dental infection

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 80 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Cone beam diagnostic examination | Cone beam diagnostic examination: Millimeter measurements will be taken at Day 0. This examination is an X-ray technique that uses a cone-shaped radiation beam. The measurements will be made on radiographic examinations Mucous measures Vestibular cortical Distance, lingual cortical measured in the middle of the cell Depth of the slot lingual cortical side Depth of the cell vestibular cortical side Bone measures Thickness of the lingual cortical measured caliper 2 millimeters under the rim Vestibular cortical thickness measured with calipers 2 millimeters under the rim Depth of the slot lingual cortical side Depth of the cell vestibular cortical side | Day diagnostic (Day 0) | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Cone beam pre implant examination | Cone beam pre implant examination : millimeter measurements will be taken at 5 or 6 months. This examination is an X-ray technique that uses a cone-shaped radiation beam. The measurements will be made on radiographic examinations Mucous measures Vestibular cortical Distance, lingual cortical measured in the middle of the cell Depth of the slot lingual cortical side Depth of the cell vestibular cortical side Bone measures Thickness of the lingual cortical measured caliper 2 millimeters under the rim Vestibular cortical thickness measured with calipers 2 millimeters under the rim Depth of the slot lingual cortical side Depth of the cell vestibular cortical side | 5 or 6 months | 
| Clinical measures | Clinical measures on the day of surgery Bone measures Thickness of the lingual cortical measured caliper 2 millimeters under the rim Vestibular cortical thickness measured with calipers 2 millimeters under the rim Cortical vestibular cortical lingual distance, measured in the middle of the cell Depth of the slot lingual cortical side Depth of the cell vestibular cortical side Mucous measure: Gum buccal keratinized Keratinized gingiva lingual Cortical vestibular cortical lingual distance measured in the middle of the cell | Day of surgery | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Regeneration