Background: Bisphosphonates are potent inhibitors of bone resorption and were shown to inhibit bone resorption in experi- mental periodontitis by unknown mechanisms. We studied the effect of the aminobisphosphonate sodium alendronate (SA) in experimental periodontitis. Wistar rats were subjected to liga- ture placement around the second upper left molars. Methods: Animals were treated with SA 0.01 to 0.25 mg/kg...