Zeng Jian-yu, Yuan Yu-shu, Ma Lan
Department of Prosthodontics, Faculty of Stomatology, Capital University of Medical Sciences, Beijing 100050, China.
Zhonghua Kou Qiang Yi Xue Za Zhi. 2003 Mar;38(2):113-5.
To study the edentulous patients facio-maxillary characters, and discuss the base of recording jaw relation by swallowing action.
Forty-three edentulous patients were included in this study, age ranged from 57 to 70 yr, with new comfortable full dentures. Two lateral cephalograms for one patient were taken by SIRONA digital X-ray dental system, one of which was centric occlusion with full denture, another was the end position of swallowing action without denture.
The vertical facial dimensions of male were a little more than that of female. The ratio of lower front facial height/upper front facial height was about 6/5, angle S-N-Po was about 78 approximately 80 degrees. These data may be useful for dentists to make diagnoses if the jaw relation is right or not. Both in vertical or anterior-posterior (horizontal) dimension, the differences between two groups (two actions in one patient) were not significant. It showed that two positions of two actions were the same.
The SIRONA digital X-ray dental system for cephalometry was swift, and had its own characters. The way of swallowing and occluding is one of efficient methods to record the jaw relation of edentulous patients veraciously and naturally.
研究无牙颌患者的面颌特征，探讨通过吞咽动作记录颌位关系的依据。
本研究纳入43例无牙颌患者，年龄57至70岁，佩戴新的舒适全口义齿。使用西诺德数字化牙科X射线系统为每位患者拍摄两张头颅侧位片，一张是佩戴全口义齿时的正中咬合位，另一张是不戴义齿时吞咽动作的终末位。
男性的面部垂直维度略大于女性。下前部面高与上前部面高之比约为6/5，S-N-Po角约为78至80度。这些数据有助于牙医判断颌位关系是否正确。在垂直或前后（水平）维度上，两组（一名患者的两种动作）之间的差异均不显著。表明两种动作的两个位置相同。
西诺德数字化牙科X射线头颅测量系统操作快捷，且有其自身特点。吞咽和咬合方式是准确、自然地记录无牙颌患者颌位关系的有效方法之一。
