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本文目的在于研究无牙颌患者切牙乳突与按正常排牙后的上前牙位置关系。所用方法：为无牙颌患者排列全牙列后，测量切牙乳突至上前牙唇面及上尖牙连线间距离。结果：①上尖牙间距离男性大于女性，两者间呈非常显著差异；②无牙颌患者的切牙乳突平均长度为４．６０ｍｍ，与自然牙列者接近；③切乳后缘至尖牙连线及上左中切牙唇面间距分别为１．９２ｍｍ及８．１５ｍｍ，明显小于自然牙列者。而性别间无统计学差异。结论：①切牙乳突仍可作为排列全口义齿上前牙的解剖标志；②因牙列缺失，牙槽骨吸收致切牙乳突向唇向上前移约１．０ｍｍ。
The purpose of this paper is to study the relationship between the incisors of the edentulous jaw and the upper anterior teeth after normal tooth extraction. Method used: After the edentulous jaw patients were arranged in the full dentition, the distance between the incisors and mastoid was measured to the upper front teeth face and upper canine line. Results: ①The distance between the maxillary canines was significantly larger than that of the females, and there was a significant difference between them. ② The average length of the incisors of the incisors was 4.60 mm, close to that of the natural dentition. ③ The posterior margin of the incisors Canine connection and upper left incisor face spacing were 1.92mm and 8.15mm, significantly less than the natural dentition. There was no significant difference between genders. Conclusion: ① The incisors can still be used as an anatomical landmark to arrange the anterior teeth on the complete denture. ② The dentinal malulases are caused to move forward by about 1.0mm to the lips due to the loss of the dentition.