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摘要


過早喪失的下顎臼齒,不只會造成鄰接牙傾斜或不當的位移,也會使上顎對咬牙產生過度萌發,更嚴重連帶齒槽骨向下生長,使得後牙區顎間垂直距離不足;因此如何去完成合適之補綴物便是一大挑戰。本病例為二十二歲女性,因為有上述的困難,以至於不能製作補綴物。經分析擬定其治療計劃為:上顎後牙區以門診手術進行二階段的後上顎根尖截骨術(posterior subapical osteotomy),增加顎問垂直距離,並以局部矯正裝置改正咬合平面,最後利用人工植牙方式來製作補綴物,來恢復病患的咀嚼功能。

並列摘要


Maxillary molars can over-erupt when their antagonists are lost and there are no replacements. When the opposing molars severely extrude into the edentulous space, it is difficult to replace the missing teeth with either fixed or removable prostheses. We present the following case report, providing a solution for this type of problem. A two-stage posterior subapical osteotomy was used to reestablish the intermaxillary space. Following orthodontic treatment and implant placement, the patient regained occlusal harmony and normal masticatory function.

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