暫時性錨定裝置力學性質之文獻回顧

Mechanical Properties of Temporary Anchorage Devices – Review Article

暫時性錨定裝置目前廣泛用於對於矯正治療中，其優點包括增加錨定、體積小容易置放、可以立即施力及不需依靠病人的合作度。目前暫時性錨定裝置的成功率大於八成。影響骨釘穩定度包含許多影響因子：置入扭矩、種植部位骨頭條件、矯正施力大小及方向、口腔清潔、周圍軟組織情況及置入方式。市面上有許多不同形狀、材質與種類的迷你骨釘供矯正醫師選擇，而種類不同的骨釘可能產生不同的力學性質進而影響骨釘的成功率。因此本篇文獻回顧探討暫時性錨定裝置設計及比較自鎖式（selfdrilling）與自攻式（self-tapping）迷你骨釘之扭矩、穩定度及臨床應用。希望藉由本文獻回顧提供矯正醫師臨床使用迷你骨釘之選擇及植入方法之參考。

Temporary anchorage devices (TADs)are common used in orthodontic treatment for anchorage and force application. They have many advantages, including small size for insertion, potential for immediate loading, no need of patients' compliance. The success rate of miniscrews was more than 80%. There are several factor affecting stability of TADs, including: insertion torque, soft tissue condition and bone quality of insertion area, magnitude and direction of orthodontic force, oral hygiene condition and insertion method. There are many different shapes, materials and types of miniscrews. Different types of TADs may have different mechanical properties and result in different success rate. We discussed miniscrews design, insertion and removal torque, compared self-drilling with self-tapping miniscrews for their physical properties and clinical application in this review article.