COMPARISON OF THE MEAN REDUCTION IN TRISMUS POSTOPERATIVELY AFTER USE OF 4MG AND 8MG INTRAVENOUS DEXAMETHASONE PRE OPERATIVELY, FOLLOWING IMPACTED MANDIBULAR THIRD MOLAR SURGERY

Abstract

Objective:
 To compare the mean reduction in trismus postoperatively after the use of 4mg and 8mg intravenous dexamethasone preoperatively, following impacted mandibular third molar surgery.
 Materials and Methods:
 This cross-sectional comparative study was conducted at the department of oral and maxillofacial surgery Peshawar dental college, Peshawar from 10th December 2018 to 16th July 2019 after the college’s review board has approved it. In this study, a total of 60 Patients of both genders 18 years to 40 years with 35 mm or greater mouth opening, and partially impacted mandibular third molars were included by consecutive, non-probability sampling technique. The analysis of the data was done by using SPSS version 20.0. The student t-test was used to compare both groups i.e. mean reduction in trismus with 4mg dexamethasone and     8 mg dexamethasone on day 2. A P≤0.05 was taken as significant.
 Results:
 After 2 days of administration of 4mg dexamethasone, the mouth was reduced from a mean of 49.63±6.78mm to 28.2±2.917 mm. Similarly, after 2 days of administration of 8mg dexamethasone, the mouth was reduced from a mean of 50.3±7.32 mm to 35.93±2.50 mm. Genders have no effect on mouth opening after dexamethasone use. Age has an effect on the reduction of mouth opening after dexamethasone use. the mean reduction of maximum mouth opening(trismus) was less after giving 8 mg of dexamethasone than 4mg dexamethasone statistically significantly.
 Conclusion:
 The use of 8 mg dexamethasone is found to be more effective in decreasing postoperative trismus in patient having third molar surgery as compare to 4mg dexamethasone.