الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
Distraction osteogenesis is a technique used in the craniomaxillofacial region to lengthen bony segments deficient due to hereditary or acquired causes. First introduced to the orthopedic community as an effective treatment option by Ilizarov, it was adopted into the maxillofacial field by McCarthy in 1992. Since then, the surgical and technological advances made in the field of DO provided oral and maxillofacial surgeons with a safe and predictable method to treat selected deformities of the oral and facial skeleton
This study aimed to evaluate the use of computer-guided surgical templates in mandibular distraction osteogenesis, both clinically and radiographically.
This study was conducted on 7 patientssuffering from hemifacial microsomia or post-ankylotic deformity. Patients underwent a preoperative CBCT scan for diagnosis, virtual treatment planning, and surgical guide fabrication. Under general anesthesia, the patients underwent the procedure of mandibular osteotomy and extraoral distractor insertion utilizing the surgical guide. An immediate postoperative CBCT was taken to assess the procedure and check accuracy of the guide. A 6-Months postoperative CBCT scan was taken to assess the patients’ skeletal and soft tissue changes after consolidation.
Average deviation in pin distance was 3±0.6 mm and in vector angle 13.6⁰±3.4⁰. Average deviation in osteotomy distance was 2.6±2 mm and in osteotomy angle 14.2⁰±11.3⁰. There were no traumatic injuries to the IAN or any dental follicles.
Comparison of pre and post-distraction landmarks on the defective side showed significant to highly significant changes. Comparison of post-distraction defective side landmarks to normal side landmarks showed a non-significant difference.
Conclusions
Within the limitations of this study it can be concluded that,
1. Theuseofthevirtual treatment planning for mandibular distraction osteogenesis can significantly enhance various facial relations.
2. Theuseofthevirtual treatment planning for mandibular distraction osteogenesis can achieve adequate facial symmetry.
3. Theuseofthevirtual treatment planning for mandibular distraction osteogenesis has a low incidence of injury to vital structures.