New insights in understanding dental caries and periodontal disease: the avalanche model

Biology is based on evolution;therefore, eu-kariotes like plants, animals and human beings are living in harmony with their procariote an-cestors. If this is obviously the normal way of life, then pathobiology follows the same basic principles. The highly complex harmony of the living world may be disrupted, and a punctuated disease starts which is different from the health equilibrium. To reflect this biological archetype on the main diseases in dentistry - caries and periodontitis - the avalanche model is being proposed based on scientific and clinical evi-dence. This way of argumentation does influ-ence the strategic planning of preventive and curative programmes in dental research as well as in daily practise.

农村成年及老年人失牙情况的Logistic回归分析

目的 调查我国农村成年和老年人群的失牙原因。方法 对北京延庆县古城村20-80岁村民587人的口腔健康状况进行了十年的纵向调查。用Logistic回归分析法预测该组人群失牙的原因。结果 年龄、高牙本质龋数、高龋齿数、牙齿附着丧失≥7mm，牙齿存在动度和低龈下结石沉积位点百分率是有意义的失牙预测因子。龋齿和牙周病同是10年后人群失牙率的重要预测因子；龋齿是失牙的主要预测因子。结论 龋齿和牙周病是导致该人群10年后失于的主要原因。

应用牙周病仿真牙列模型提高龈下刮治术教学效果的探索

目的探讨牙周病仿真牙列模型在口腔医学专业本科生龈下刮治术实验课教学中的应用价值。方法将61名学生随机分成两组,分别采用牙周病仿真牙列模型和传统石膏牙模型进行龈下刮治术的讲授、示教和操作练习,结束后按标准进行操作考核和统计分析。结果牙周病仿真牙列模型组和石膏模型组学生操作考核平均分数分别为(91.34±4.97)、(86.35±4.02)分,两组比较,差异有统计学意义(P<0.05)。结论牙周病仿真牙列模型的应用可显著提高龈下刮治术的教学效果,值得应用和推广。