the effect of the submucosal injection of dexamethasone on postoperative discomfort after impacted mandibular third molar surgery

i ntroduction: our study was designed to assess the effect of the submucosal injection of dexamethasone on postoperative discomfort after surgical removal of impacted mandibular third molars. m at erials and methods : twenty six patients with bilaterally bony impacted mandibular third molars were recruited to this split mouth study. on the study side, prior to surgery, 8 mg of dexamethasone was injected in buccal vestibule submucosally, while the control side received no steroid. complications such as swelling, trismus and infection were evaluated postoperatively. results : the results showed that the patients experienced significantly less swelling  (p=  0.001)  on  study  side  on  the  3rd   and  7th   postoperative  days compared to the control side. the amount of trismus was significantly less (p=0.001) after submucosal injection of dexamethasone on both time intervals. conclusion: perioperative submucosal injection of dexamethasone can significantly reduce postoperative swelling and trismus after surgical removal of the impacted teeth.