double-blind, clinical trials to compare the analgesic efficacy and safety of tramadol with that
of non-steroidal anti-inflammatory drugs (NSAID) in operations on the third molars. We
identified eligible reports from searches of PubMed, MedLine, the Cochrane Library, Oxford
Pain Relief database, Imbiomed, and Google Scholar. The full text of studies that met our
minimum requirements were evaluated using inclusion and exclusion criteria with the Oxford …