The bilateral sagittal split Ramus osteotomy (BSSRO) was introduced by Trauner and Obwegeser. Since then, many modifications of this procedure have been reported, leading to a less difficult and more predictable procedure for correcting mandibular anomalies. persistent post-operative neurosensory disturbances of the inferior alveolar nerve are still one of the major complications of this operation. The incidence has decreased over the years due to improved techniques and the use of different instruments. However, most recent series still report postoperative persistent hypesthesia of the inferior alveolar nerve in more than 10% of the patients up to 48%. There are no reports on the influence of other surgical variables on the persisting post-operative hypesthesia. Several methods have been reported for evaluating neurosensory disturbances of the inferior alveolar nerve. One of the simplest methods reported is tactile evaluation based on subjective sensation reported by the patients. Many authors have used this method in their evaluation of post-operative hypesthesia.
Study Type
INTERVENTIONAL
Allocation
NA
Purpose
SCREENING
Masking
NONE
Enrollment
36
The final split is completed with a thin osteotomes, splitting the entire ascending ramus from the anterior to the posterior border of the ramus.
Faculty of Dentistry
Cairo, Egypt
neurosensory disturbance of the inferior alveolar nerve.
use Von Frey filaments to test sensory function of the lower lip and two point discrimination test (blunt and sharp ) also to assess the sensory function
Time frame: 1 year
Incidence of bad split
if bad split in the mandible occur during the operation it will be reported
Time frame: 1 year
post operative edema ,
preoperative measure from the tragus to mid of the chin by cm then the measure is repeated to count the amount of edema
Time frame: 1 year
post operative pain
by visual analogue scale from 0 to 10 and the patient choose the number
Time frame: 1 year
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