This study was to evaluate clinical success rate of miniscrew with different screw design. 105 tapered and cylindrical self-drilling miniscrews were placed into maxillary and mandibular buccal alveolar bone of 60 patients. Success rate was compared according to implantation site and design. The insertion torque (IT) was measured immediately after implantation and periotest value (PTV) was recorded as mobility value, and removal torque was measured on removal of them. Overall success rates were 80.9% and 80.0% for tapered and cylindrical miniscrews, respectively. There was no significant difference in success rate between maxilla and mandible. When classifying insertion torque into three categories (IT<5, 5