We investigated the effect of etoricoxib, a selective cyclooxygenase- 2 inhibitor, and indomethacin, a non-selective cyclooxygenase inhib- itor, on experimental periodontitis, and compared their gastrointesti- nal side effects. A ligature was placed around the second upper left molars of female Wistar rats (160 to 200 g). Animals (6 per group) were treated daily with oral doses of 3 or 9 mg/kg etoricoxib, 5 mg/...