上颌牙根特别是上颌磨牙的牙根与上颌窦底的关系非常密切,在临床上拔除此类牙时很容易造成上颌窦底或将断根推入上颌窦内,为此笔者对上颌窦底的形态与上颌牙根的关系,进行了临床研究,并结台笔者在临床上遇到的10例意外进行分析,为临床拔牙及避免造成上颌窦损伤提供参考。本文的临床资料是选用我院放射科在1993年1月～1996年1月间拍摄524张符合研究要求的上颌双尖牙,第一、二、三磨牙的根尖片。研究方法是按日本学者腾下昌已根据上颌牙根与上颌窦的关系确定的四种类型即接触型、非接触型、交叉型和突出型四种,统计学采用 SPLM 统计软件对牙位、性别各 The maxillary root, especially the maxillary molar root and the relationship between the maxillary sinus very close, in the clinical removal of such teeth is likely to cause the maxillary sinus or the root will be pushed into the maxillary sinus, this author on the maxillary sinus floor morphology and Maxillary root of the relationship between the clinical research, and the end station in the clinical encounter of 10 cases of accidental analysis for the clinical extraction and to avoid the maxillary sinus injury caused by reference. The clinical data of this paper is to select 524 apical pieces of the maxillary bicuspion, first, second and third molars in our hospital from January 1993 to January 1996. The research method is according to the Japanese scholar Teng Xiaochang has been based on the maxillary root and maxillary sinus relationship identified four types of contact, non-contact, cross-type and prominent four kinds of statistics using SPLM statistical software on the tooth position, gender each