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The purpose of the study is the comparison of bone gained histologically from the Bone Shell Khoury's Technique in comparison with the usage of non-resorbable membrane polytetrafluoroethylene and discussing its eligibility for implant placement in restoring the atrophic posterior mandible.
The aim of this study is to assess the bone gained histologically when comparing the following different techniques:
One of the techniques that is used for bone augmentation is the Khoury technique which entails that a split cortical bone shell obtained from the ramus area through piezoelectric surgery. The thin laminae of bone obtained is stabilized in the defect area labially through micro screws and the generated gap is filled through a mixture of autogenous that could be obtained from the retromolar area through special burs as the auto chip maker (ACM) or via bone scrapper. The obtained is mixed with an equal ratio with xenograft or bone obtained from animal source to fill the created gap.
Another technique involves the usage of a non-resorbable membrane known as reinforced titanium PTFE that is stabilized from both the lingual and labial aspects via micro screws .It's then filled with a mixture of both autogenous and xenograft for maximizing the bone formation capability. In some cases, the reinforced titanium PTFE is covered with collagen membrane to avoid one of the common drawbacks of this technique which is wound dehiscence.
This study aims to evaluate the bone quality gained from both techniques.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| GBR using Ti based PTFE | Experimental | This group will receive a non resorbable membrane using titanium reinforced polytetrafluorethylene membrane. |
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| Bone Shell Khoury's Technique | Active Comparator | This group will receive a block graft using Khoury Technique. |
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| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| GBR using Ti based PTFE | Procedure | Patients will receive a non resorbable membrane using titanium reinforced polytetrafluorethylene membrane with full releasing flap buccal and lingual with the lingual dissection for the releasing of the mylohyoid attachment and nerve dissection of the mental nerve buccally. The membrane needs to be fixed lingually with microscrews or titanium screws then the gap will be filled through Auto Chip Maker ACM or bone scraper from the external oblique ridge. Then the harvested bone shall be mixed xenograft with ratio 70 to 30 then the membrane fixed buccally as well as covered by collagen membrane to avoid one of the main obstacles of the procedure which is wound dehiscence. |
| Measure | Description | Time Frame |
|---|---|---|
| Histomorphometric analysis of gained bone | Primary evaluation is achieved through re opening of the flap after 6 months for removing the microscrews used in Khoury group and the nonresorbable membrane as well as the screws will be removed from the nonresorbable membrane group. Then the usage of 2 millimeters bur for core biopsy at the site of the implant that will be placed. | 6 Months |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Role | Phone | Extension | |
|---|---|---|---|---|
| Abdelaziz H. Saad Abdelkarim, Bachelor's Degree | Contact | +201020690459 | PG.Abdelaziz92344012@bue.edu.eg |
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| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| The British University in Egypt | Recruiting | Cairo | Egypt |
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| Bone Shell Khoury's Technique | Procedure | A block graft using Khoury Technique: Prior to harvesting the needed bone, measurement of the defect size as well as measurement of the donor site bone block will be harvested from the mandibular retromolar area. The bone shall be acquired through piezoelectric device that perform the osteotomy then separated through the usage of thin chisel. The acquired bone needs to be smoothened to avoid any sharp edge that may cause wound dehiscence or infection. The harvested bone will be divided into two thinner bone shells through using titanium disk with copious irrigation with saline. The bone shell shall be fixated in the defect site buccally through two microscrews at least then the created space shall be filled with a combination of autogenous bones harvested through Auto Chip Maker (ACM) or bone scraper from the external oblique ridge. The harvested bone will be combined with xenograft with ratio 70 to 30 then the defect shall be covered with collagen membrane. |
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