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Serial Extraction in Orthodontic Treatment of Mixed Dentition

循序拔牙法於混和齒列之矯正治療

摘要


循序拔牙法是一種計劃性的,依序拔除某些乳齒與恆齒的拔牙模式。藉此紓解嚴重的牙齒與顎骨大小差異,維護顏面美觀。在此我們報告兩個處於混合齒列時期,安格式一級咬合、齒列嚴重擁擠、並伴有中度齒槽突出的案例。利用循序拔牙法、南氏顎弓裝置、以及固定式矯正器等步驟,我們將齒列排整齊,並達成理想咬合與美觀輪廓。

並列摘要


Serial extraction is the planned extraction of certain deciduous teeth and specific permanent teeth in an orderly sequence, thus solves the problem of severe tooth-size/arch-size discrepancies, and preserves facial esthetics. Here we represent two cases of class I with severe crowding and moderate dentoalveolar protrusion in the stage of mixed dentition. By the procedures of serial extraction, Nance holding arch delivery and subsequent direct bonding with bracket to align the teeth, the ideal occlusion and esthetic profile were accomplished.

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