“…There are two types of NSAIDs, those that non-selectively inhibit the cyclooxygenase-2 (COX-2) enzyme [ 18 , 19 ] and the drugs that selectively inhibit that enzyme [ 20 , 21 ]. This last kind of drug has been used in clinical trials to determine its efficacy for pain management after periodontal surgery [ 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 ], and has been compared with placebo, other NSAIDs, and glucocorticosteroids [ 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 ]. The aim of this systematic review and meta-analysis was to evaluate the analgesic effect of the selective COX-2 drugs in comparison to the placebo, and active controls for pain control after periodontal surgery.…”