الفهرس 
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Abstract
This academic work was aimed at evaluating of the neurosensory disturbances of the mental nerve associated with the twin-fork-miniplate and evaluating its biomechanical behavior during fixation of fractures at the anterior transition zone of the mandible.
Nine patients with mandibular parasymphyseal-body fractures were selected from the Emergency Ward at Alexandria University Teaching Hospital.
The selected patients in this study were with a mean age of 30.56±16.77 years with a male to female ratio of 8:1. A detailed history taking and a throughout the clinical examination and radiographic examination were performed and recorded for each patient.
Surgical Procedure
All patients were treated in a supine position under general anesthesia with nasotracheal intubation. The surgical field was cleansed with a povidone-iodine surgical scrub solution before draping the patient with sterile cloths to expose just the operative region. After temporarily securing the occlusion with I.M.F., the fracture line was revealed and manually reduced; a twin-fork miniplate with a thickness of 1mm was applied and secured with 2.0 mini screws varying in length from 5 to 9 mm. Clinical and Radiographic follow up
Regarding the postoperative pain sensation, a highly statistically significant decrease in the level of the reported pain sensation across the follow-up period was recorded (p<0.001).
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Four patients complained of wound dehiscence at the first postoperative Week. At the fourth postoperative, only one patient was still complaining of wound dehiscence due to smoking and uncontrolled blood glucose level.
Two patients showed moderately unstable occlusion, which became better by using I.M.F. The change in occlusion stability across time was not statistically significant p-value = 0.106.
None of the fractures showed intra-fragmentary mobility during the follow-up period.
88.9% reported numbness until the first postoperative week. Only two patients complained of numbness after four weeks. No patients had numbness after six weeks.
The objective test results matched the subjective exam .
Statistically, there was no difference between the healthy and fractured sides‟ regarding the amplitude, latency, and conduction velocity.