Condylar Segment Repositioning Using CAD/CAM Generated Wafer After BSSO in Skeletal Mandibular Deformity

Study Overview
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Brief Summary
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Maintaining the condylar position after bilateral sagittal split ramus osteotomy (BSSO) is one of the most important aspects in terms of condylar function ,.An altered condylar position can cause internal derangement of the joint, loss of the mandibular angle, increased risk of relapse, condyle sagging, and impaired masticatory function. In previous years, a great deal of attention has been paid to maintaining the preoperative condylar position during orthognathic surgery. Numerous condylar positioning methods have been reported and could be divided into manual/empirical methods, conventional methods , navigation, and sonographic monitoring, Computer guided methods which is more accurate than other methods

Detailed Description
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unpredictable condylar position after orthognathic surgery, will lead to malocclusion, derangement of the condylar surface, condylar resorption, condylar sag, distraction of the condyles from the fosse. In previous years, several authors had been adopted several techniques to maintain the preoperative condylar position during orthognathic surgery. Numerous condylar positioning methods have been reported which could be divided into conventional techniques (manual maneuvers or aiding tools), Extra and intra oral navigational techniques , surgeons had been utilized these techniques in condylar repositiong after BSSO but it was time and effort consuming and sometimes it was inaccurate. the aim for conducting the research is accurate positioning of condyle three dimensionally to minimize effort and operating time of surgery .

Official Title
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Condylar/Proximal Segments Repositioning Using CAD/CAM Generated Wafer After Bilateral Sagittal Split Osteotomy in Skeletal Mandibular Deformity

Conditions
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Skeletal Abnormalities

Intervention / Treatment
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* Other: Bilateral Sagittal Split Osteotomy


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Age of the patient above 18 years Patients needs bilateral sagittal split osteotomy All patients are free from any systemic disease that may affect normal bone healing Sufficient dentition to reproduce the occlusal relationships Patient's consent to participate Exclusion Criteria: Patient with TMJ Disorders Patients with any systemic disease that may affect normal healing Intra-bony lesions or infections that may interfere with surgery.the presence of Previous orthognathic surgeries
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: Other
Intervention Model: Single Group Assignment
Interventional Model Description: Condylar/Proximal Segments Repositioning Using CAD/CAM Generated Wafer After Bilateral Sagittal Split Osteotomy in Skeletal Mandibular Deformity
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Other: computer guided condylar reposition device<br>surgical procedure : under general anesthesia after BSSO condyle will be repositioned by computer guided repostioning device | Other: Bilateral Sagittal Split Osteotomy<br>* after BSSO condyle will be re positioned by using computer guided device<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| accuracy of postoperative condylar position in relation to the corrected virtual model | the accuracy of postoperative condylar position will be assessed using Mimics soft ware ,measuring unit (mm) | immediate postoperative | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| operative time | surgical time will be assessed via clinical assessment measuring unit (hours) | during operation |