An object of the invention is to provide a tightening apparatus for a dental implant capable of reducing the occurrence of slip phenomenon in a manual operation. The tightening apparatus includes a torque wrench (W) and a slip detection device (D). The torque wrench (W) includes a tightening part, a wrench body having a head (21) provided with the tightening part (10) and a handle (22), and a load cell (30) for detecting tightening torques. The slip detection device (D) includes a slip determiner (52) and a buzzer (93). The slip determiner (52) is adapted to sample an amount of change of the tightening torques in every predetermined time t, to sequentially compare the amount of change of the tightening torques in a prior predetermined period t with the amount of change of the tightening torque in a subsequent predetermined period t that is immediately after the prior predetermined period t, and to determine whether or not the latter amount of change is smaller than the former amount of change. The buzzer (93) notifies the tightening state is on the verge of slip phenomenon when the slip determiner (52) determines that the latter amount of change is smaller than the former amount of change.本發明之目的係為提供一種可以在手動操作時抑止滑動現象發生之牙科植入用之鎖緊裝置。鎖緊裝置係具備：扭力扳手、及滑動檢測裝置。扭力扳手係具備：鎖緊部；具有設置鎖緊部的頭部、及把手部之扳手本體；及檢測鎖緊扭力之負載元件。滑動檢測裝置係具備：每隔特定時間採樣鎖緊扭力的變化量，並且依序比較先前的特定期間之鎖緊扭力的變化量、與其後的特定期間之鎖緊扭力的變化量，判定後者的變化量是否比前者的變化量更小之滑動判定部；及在滑動判定部判定後者的變化量比前者的變化量更小時，通知鎖緊狀態為即將發生滑動現象之蜂鳴器。
