A STUDY OF THE TEETH PALPATION AS A OCCULUSAL EVALUATION

由于技术简单，并且不需要特殊设备，因此在叩牙过程中的数字覆盖对牙齿咬合调整和修复特别有用。本研究旨在探讨牙触诊法对牙过早接触的指压、牙位移及判别能力。使用关节器和树脂制成的上下模体制作触诊模拟器。主观触诊牙采用铸型右上中切牙、犬牙和第一磨牙的人工牙。将磁体和磁传感器制成的位移计固定在主牙舌面。通过由关节下部和下模组成的模拟器下部结构的摆动运动来模拟牙的敲牙运动。用不同厚度（25,50,100和200mum）的铂箔依次固定在铸体的下齿列上，模拟咬合干扰。5名牙医参与了这项研究。本研究得到以下结果：模拟触诊法测得的指压值高于以往间接调查法测得的值。只有上切牙的唇位移随干涉量的增加而增加。大部分牙医能分辨出每颗主诊牙的咬合干扰，其程度在100 ~ 200mum之间。在本研究中，牙齿的移位与牙医的歧视没有关系。

Digital plapation during tooth tapping is particularly useful for occlusal adjustment of teeth and restorations because of the simplicity of the technique, and because it requires no special equipment. The purposes of this study were to investigate the finger pressure, the tooth displacement and the discriminate ability of dentist premature tooth contact applying tooth palpation. A simulator for palpation was produced using a articulator and upper and lower cast made from resin. The artificial teeth of upper right central incisor, canine and first molar of the cast were used for the subjective teeth of palpation. The displacement meter produced from magnet and magnetic sensor was fixed on each lingual surface of the subjective tooth. The teeth tapping movement was simulated by the pendulous movement of the simulator's lower structure constructed from the lower part of articulator and the lower cast. Furthermore the occlusal interference was simulated by each multiple-thickness(25,50,100 and 200mum) platinum foil which was fixed on the lower dentitions of the cast in sequence. 5 dentists participated in this study.Following results were obtained from this study.1. The finger pressure of palpation using simulator showed stronger than the values of previous reports which were investigated indirectly.2.Only the labial displacement of upper incisor increased according to the amount of interference.3. The greater part of dentists could discriminate the existence of occlusal interference which were 100 or 200mum at the every subjective tooth.4. There was no relation between the displacement of tooth and dentists' discrimination in this study.