Abstract
Gummy smile correction requires connecting the arch wire with screws. In this case, power chains cannot be hooked due to the upward traction. A simple solution is to tie the power chains directly to the arch wire in the anterior segment, also known as the Chris’ tie, and then attach the power chains to the screw heads. It’s easy to maneuver and can save on material costs. In addition, during space closure, if the anterior segment is required to be simultaneously connected with molar tubes and posterior screws, one can combine a Chris’ tie and a canine hook to achieve both aims. The Chris’ tie is a cost-saving, efficient and simple alternative to hooks in these two common clinical scenarios.
摘要
治療露笑齦（Gummy Smile）的案例時，需連結主線和上頷前牙根尖處的骨釘。在此無法直接以 Power Chain 勾住 Hook 來連接。此時可將 Power Chains 直接綁在上頷前牙區的主線上（又稱 Chris’ Tie），向上牽引至在上頷前牙根尖處的骨釘，操作簡單又減少材料使用。另外在關閉空間時，如果希望前牙區同時連接 Molar Tube 及後牙區的骨釘時，利用 Chris’ Tie 加上犬齒上的 Hook 也可以同時連接到兩處，是兼具提升效率和降低成本的理想替代秘訣。