Li Si-yu, Xu Jun
Department of Prosthodontics, Peking University School and Hospital of Stomatology, Beijing 100081, China.
Zhonghua Kou Qiang Yi Xue Za Zhi. 2008 Jul;43(7):418-21.
To evaluate whether the mesial displacement of the mandibular complete dentures with long-centric occlusal pattern could meet the long centric of edentulous patients and to verify the design theory of the long-centric occlusal pattern of complete dentures.
Complete dentures with three different occlusal patterns were made for each of 10 edentulous patients. Gothic arch tracing apparatus was used to record the long centric of edentulous patients. Three-dimensional measuring apparatus was used to measure the mesial displacement of mandibular dentures with three occlusal patterns. Comparison of the mesial displacement of three occlusal pattern dentures was made each other and with the long centric of the patients respectively.
The mean of long centric was (1.02 +/- 0.36) mm. The means of mesial displacement of mandibular complete dentures were as follows: the long-centric occlusal pattern dentures (1.016 +/- 0.348) mm, the linear occlusal dentures (1.092 +/- 0.448) mm, the anatomic occlusal dentures (0.409 +/- 0.253) mm.
The mandibular complete dentures with long-centric occlusal pattern can meet the physiological requirement for the long centric of edentulous patients and achieve a free slide from the centric relation position to the muscular contact position of the mandible.
评估具有长正中咬合模式的下颌全口义齿的近中移位是否能满足无牙颌患者的长正中，并验证全口义齿长正中咬合模式的设计理论。
为10名无牙颌患者每人制作三种不同咬合模式的全口义齿。使用哥特式弓描记仪记录无牙颌患者的长正中。使用三维测量仪测量三种咬合模式下颌义齿的近中移位。分别比较三种咬合模式义齿的近中移位，并与患者的长正中进行比较。
长正中的平均值为（1.02±0.36）mm。下颌全口义齿近中移位的平均值如下：长正中咬合模式义齿（1.016±0.348）mm，直线型咬合义齿（1.092±0.448）mm，解剖式咬合义齿（0.409±0.253）mm。
具有长正中咬合模式的下颌全口义齿能够满足无牙颌患者长正中的生理需求，并实现从正中关系位到下颌肌肉接触位的自由滑动。
