使用ISW (improved super-elastic Ti-Ni alloy wire )不拔牙治療成人下顎雙側第二小臼齒完全舌側偏移之病例

ISW (improved super-elastic Ti-Ni alloy wire) for Non-extraction Treatment of Adult Case with Linguoversion of Bilateral Lower Second Premolars

一位20歲成年男性因下顯後牙擁擠而來求診。臨床檢查發現下額前牙有輕微齒問空隙及雙側第二小臼齒完全舌側偏移。由於病人不願接受拔牙治療，因此使用改良型鎳-欽合金線(ISW) 進行牙齒平整 來好解下顆牙哥擁擠。藉由crimpable stopper 及open coil spring進行牙齒違心移動以創造足夠空間，同時在下頓後牙~ISWMEAW進行錯定的加強。同時藉由open coil spring及elastic chain 改正左下第二小臼齒之旋轉。治療在11 個月內完成且達成一個穩定咬合。Summary: An adu lt male (20 yea rs old) came to our cl inic with a chief complaint of lower posterior crowd ing, Clinical examination found mild spacing over the lower anterior teeth and lingually blocked-in lower second premolas. Because the patient didn't want to receive extraction treatment, ISW (improved supere lastic Ti-Ni alloy wi叫leveli嗯was performed to re lieve lower arch crowding. Sufficient space was created by distalization with open coil spring and crimpable stopper. With ISW MEAW-like wire as reinforced anchorage over the lower arch, a satisfactory result was obtained. Meanwhi 峙， lower left second premolar was derotated with open coil spring and elastic chain. Treatment was completed within 11 months and a stable occlusion was achieved after the active treatment.