الفهرس 
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Abstract
SUMMARY
The maxillofacial region is one of the most frequently injured areas of the body, and particularly the mandible is the second most frequently fractured adult facial bone because of its projecting and vulnerable position on the face. The aim of this study was to evaluate the accuracy of computer assisted surgical (CAS) guide for mandibular fracture reduction.
Patients and Methods: A total of 30 patients with fractured mandible were included in this study and grouped into two groups; group (I) treated by conventional method and group (II) treated using CAS guide. A preoperative multi-slice CT scan was performed for all the patients. Based on CT, three-dimensional reconstruction and virtual reduction of the mandibular fracture segments were done, and a virtual inferior border bone borne surgical guide was designed and exported as Standard Tessellation Language (STL) file. A surgical guide was then fabricated using a three-dimensional printing machine used for group (II) only. Open reduction and internal fixation for the fractured segments of all patients was done. For group (I) arch bar was used to maintain occlusion while surgical guide was used for anatomical reduction in group (II). Postoperative CT was performed within 7 days and results of which were compared with the virtually reduced preoperative mandibular models.
Results: Both groups compared by measuring mediolateral measurements at three points (coronoid, lingula and inferior border) to the sagittal plane bilaterally; and measuring the anteroposterior distances between two points the lingula and pogonion bilaterally. The results showed that the treatment for the CAS group was comparable to the conventional group with no significant statistical difference in linear measurements.
Conclusions: CAS guide aids in accurate anatomical reduction of the displaced fractures and beneficial in the treatment of mandibular fractures.