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

本研究的目的是探讨牙周病患者磨牙的实际情况和咬合创伤在牙周病病因学中的作用。1)采用2只猕猴，观察牙合创伤和炎症合并时龈下牙周致病菌的情况。在获得临床健康的牙龈组织后，将磨牙区分为三组：对照组、炎症组（IG：在宫颈周围结扎棉线）和联合组（COG：结扎棉线并通过接触点插入正畸弹性物）。临床检查和龈下微生物评估16周。结果显示，3组临床附着丧失（CAL）和骨吸收（BY）均以COG的临床附着丧失（CAL）和骨吸收（BY）最为严重。但IG组和COG组的表现龈菌总数、各数量及与总数量的比值均无差异。结果表明，合并病例中，咬合创伤的影响大于龈下细菌的变化。2)探讨牙周损害程度、炎症程度与咬合创伤的关系。将两只猕猴的磨牙分为6组。15周和25周进行临床和病理观察。结果表明：炎症与咬合创伤合并时，BY和CAL呈进行性变化，炎症程度是牙周的主要影响因素，而咬合创伤程度对其影响不明显。3)采用K-6诊断系统对40例牙周炎患者（P.P.）和18例健康人（H.P.）的下颌运动和肌肉活动进行了检测。结果表明：月闭速度慢，尖间位置不规则（不稳定）。结果表明，牙尖间位置的不稳定可能导致牙磨牙。4)改进了家庭睡眠时肌肉活动和牙齿接触记录装置，并对实验数据进行分析。采用逻辑系统自动分析电动力和齿面接触数据。26个科目用新系统进行了考试。磨牙分为磨牙型和咬牙型两种类型。该系统可用于牙周磨牙的调查和诊断。我们计划对磨牙症、咬合创伤和牙周病的分析进行进一步的研究。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