Removal Torque Analysis of Implants in Rabbit Tibia After Topical Application of Simvastatin Gel

摘要

The aim of this study was to evaluate the effects of topical application of simvastatin gel (7.5 mg) on the removal torque of titanium implants in the rabbit tibia. A total of 32 surgeries were performed on 16 New Zealand rabbits for the placement of 2 implants in 1 tibia of each rabbit. Only 1 of the surgical defects was injected with 30 mg/mL of simvastatin gel before implant placement. The initial torque was set at 20 N.cm, and removal torque testing was performed 28 and 56 days postoperatively with a Tonishi torque wrench. Surgical defects were divided into 4 groups: group IG-28 (test, 28 days), group IG-56 (test, 56 days), group 1-28 (control, 28 days), and group 1-56 (control, 56 days). Removal torque values were higher in group IG-56 than in groups IG-28, 1-28, and 1-56 (P < .05). Groups IG-28, 1-28, and 1-56 showed similar values (P > .05). Removal torque force increased under the influence of simvastatin, indicating that topical administration of a 7.5-mg dose of simvastatin gel is effective in improving the torque force required to remove implants inserted in the rabbit tibia.