The Analysis of Bruxism in Periodontal Patients and Occlusal Trauma in the Etiology of Periodontal Disease

本研究旨在探讨牙周病患者磨牙症的实际情况及咬合创伤在牙周病发病机制中的作用。1)以2只猕猴为实验动物，研究咬合创伤与炎症复合作用时，牙周病原菌的分布情况。取临床健康牙龈组织后，将磨牙区分为3组：对照组、炎症组(IG：棉质结扎组)和联合组(COG：结扎组：通过接触点插入正畸弹力环)。术后16周进行临床检查和龈下微生物检测。结果显示，临床附着丧失(CAL)和骨吸收(BE)在COG的临床附着丧失(CAL)和骨吸收(BY)方面均以3组最明显。但在总菌数、每株菌数和占总菌数的比例上没有差异，表现在中间介质和放线放线杆菌…IG组和COG组之间有更多的ycetemitans。2)探讨了牙周破坏与炎症程度、咬合创伤之间的关系。将2颗恒河猴磨牙随机分为6组。分别进行15周和25周的临床和病理观察。结果表明，当炎症和咬合创伤联合作用时，BY和CAL呈进行性发展，炎症程度是影响牙周的主要因素，而咬合创伤的严重程度对其影响不明显。和18名健康受试者(H.P.)用K-6诊断系统进行检查。结果表明，P.P.在月合时速度较慢，牙槽间位置不规则(不稳定)。这些结果表明牙尖间位置的不稳定可能导致磨牙症。4)改进了在家中睡眠时记录肌肉活动和牙齿接触并在实验室进行数据分析的装置。用逻辑系统对ERG和牙齿接触数据进行自动分析。用新系统对26名受试者进行了检查。磨牙症分为磨牙型和咬合型两种类型。这一新系统被认为有助于牙周患者磨牙症的调查和诊断。我们计划在磨牙症、咬合创伤和牙周病的分析方面进行进一步的研究。较少

The purpose of this study was to investigate the actual conditions of bruxism in periodontal patients and the role of occlusal trauma in the etiology of periodontal disease.1) Two macaca monkeys were used to investigate the subgingival periodontal pathogenetic bacteria when occlusal trauma and inflammation were combined. After clinically healthy gingival tissue was obtained, molar area were divided into three groups : control group, inflammation group (IG : cotton ligatures were ligated around cervical), and combined group (COG : ligatures were ligated and orthodontic elastics were inserted through contact points). Clinical examination and subgingival microbial evaluation were performed for 16 weeks. The results showed that clinical attachment loss (CAL) and bone resorption (BY) of COG were most advanced in the 3 groups. But there was no difference in the total number, the each number, and ratio to total number of performance gingivalis, Privately inter media and Actinobacillus actinom … More ycetemcomitans between the IG and COG groups. These results suggested that the influence of occlusal trauma was greater than the change of subgingival bacteria in the combined case.2) The relationship among the periodontal destruction, the grade of inflammation, and occlusal trauma was investigated. Two macaca monkey's molars were divided into 6 groups. Clinical and pathological observations were performed for 15 and 25 weeks. The result showed that when inflammation and occlusal trauma were combined, BY and CAL were progressive, and the grade of inflammation was the major factor of periodontal but the grade of occlusal trauma did not clear influence to them.3) Jaw movement and muscle activities of 40 periodontitis patients (P.P.) and 18 healthy subjects (H.P.) were examined with K-6 diagnostic system. The result showed that P.P.had slow velocity in month closure and irregular (unstable) intercuspal position. These results reveals that instability of intercuspal position may cause bruxism in P.P.4) The device for recording muscle activity and tooth contacts during sleeping at home and analyzing the data at laboratory was improved. The data of ERG and tooth contact were analyzed automatically with logic system. Twenty six subjects were examined with the new system. Their bruxism were divided to two types, i.e., grinding type and clenching type. This new system was considered to be useful for investigation and diagnosis of bruxism in periodontal patients.We are planning to have further research for the analysis of bruxism, occlusal trauma and periodontal disease. Less