A STUDY OF OCCLUSAL CONTACT ON SUPERSTRUCTURES OF IMPLANT AND NATURAL TEETH

种植牙和天然牙上部结构咬合接触的研究

• 批准号: 06671958
• 负责人: KOYANO Kiyoshi
• 金额: $ 1.34万
• 依托单位: KYUSHU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1994
• 资助国家: 日本
• 起止时间: 1994 至 1995
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-06671958/
• 关键词: IMPLANT; OCCLUSAL FORCE; MASSETER MUSCLE; ELECTROMYOGRAPH; DENTAL PRESCALE; 筋活動量; 咬合力分布; 咬合接触部位

The purpose of this study was to investigate the occlusal contacts and force in superstructures supported by implant and natural teeth under loading condition. The testing group consisted of 20 partially edentulous patient who had been treated with fixed partial prostheses supported by implants. Surface EMG activity was recorded from bilateral masseter muscles activity at maximum clenching, and the activity was defined as 100% maximum voluntary contraction (MVC). Occlusal contacts and force were measured by dental prescale at 25%, 50%, 75%, 100%MVC.Each clenching level was performed with visual feedback of the bilateral masseter muscle activities. Occlusal contacts were recorded three times every clench level.To evaluate occluasl contacts, following factors were analyzed.1.ooclusal force2.area of occlusal contacts3.number of occlusal contacts4.implant/natural teeth supported force ratioThe following results were obtained.1.The occlusal force increased differently from the way in superstructures of implant and natural teeth.2.Response of fixed partial prostheses supported by implants was dependent on classification of the edentulous zone where the implants had been placed.

本研究的目的是研究种植牙和天然牙支撑的上层建筑在加载条件下的咬合接触和受力情况。试验组为20例部分无牙颌患者，接受种植体支持的固定部分修复。记录双侧咬肌在最大咬合时的表面肌电活动，并将其定义为100%最大自主收缩(MVC)。分别在25%、50%、75%、100%MVC下测量咬合接触和咬合力。每一咬合水平均通过双侧咬肌活动的视觉反馈进行。每个咬合水平记录三次咬合接触。为了评价咬合接触，对以下因素进行了分析：1.牙合力2.咬合接触面积3.牙合接触数4.种植牙/天然牙的支撑力比率：1.牙合力的增加方式与种植体和天然牙的上部结构不同。2.种植体支持的固定部分修复体的反应取决于种植义齿所在无牙区的分类。