A Study on Occlusal Contacts of Complete Denture during Mastication

本研究旨在研制一套遥测系统，以分析咀嚼过程中全口义齿的咬合接触情况，该遥测系统由一个带电池的发射单元和一个接收单元组成。发射器可在约2 m的距离内以时分多路通信方式遥测6路咬合接触信息，上全口义齿咬合面由金属制成，下全口义齿咬合面由0.5mm宽的金属接触板制成，每隔0.5mm，发射器嵌入下全口义齿中。对66例老年无牙颌男性的咀嚼侧和非咀嚼侧的前磨牙、第一磨牙和第二磨牙区的咬合接触进行了研究。非咀嚼侧的咬合接触先于咀嚼侧，且频率高、持续时间长.在非咀嚼侧，前磨牙区的咬合接触发生在不同的时间，第二磨牙最早，第一磨牙32-48 ms后，前磨牙区2-48 ms后.因此，咀嚼时应考虑平衡接触对全口义齿的稳定作用。

The purpose of this study was to develop a telemetry system and to analyze the occlusal contacts of complete denture during mastication.The telemetry system consisted of a transmitter unit with battery and a receiver unit. The transmitter allowed 6 channels of information of the occlusal contacts to be telementered by time division multiplex communication method within the approximate distance 2m.The occlusal surface of the upper complete denture was made of metal and that of the lower denture was made of metal contact plates of 0.5 mm in width each space of 0.5 mm. The the transmitter was embedded in the lower denture. Occlusal contacts of 66 aged edentulous male were invesigated both on the chewing side and on the nonchewing side in the premolar, the 1st molar and the 2nd molar regions.The results were as followed :1. The occlusal contacts in the nonchewing side preceded those in the chewing side, with higher frequency and longer durtion.2. In the nonchewing side, the occlusal contact of the premplar region occurred at different time ; the occlusal contact was observed first in the 2nd molar, then 32-48 ms later in the 1st molar, and 2-48 ms later in the premolar regions.3. It is suggested that the balancing contact should be considered for stabilizing the complete denture in masication.