楔状缺损患者错牙合情况研究

【摘要】 目的 分析楔状缺损错牙合的关系。方法 选择 125例患楔状缺损的中老年人,按楔状缺损的严重程度分为正常、轻、中、重4组。采用临床咬牙合诊断方法进行安氏咬牙合分类的检查。结果 楔状缺损患者安氏错牙合人数比例明显高于未患牙;结论 楔状缺损的发生与牙合力负担过重及异常牙合力有关。

【关键词】 楔状缺损 错牙合 中老年人。

【Abstract】 Objective To clinically investigate and identify the occlusal conditions as one of the factors related to formation of wedge—shaped defects. Methods Subjects of 125 were selected from a group of middle—aged and elderly people in an urban area. According to the depth of wedge—shaped defects, subjects were divided into four groups:control,light,middle and severe group. Angle’s classification were examined by clinical diagnosis technique.

Results Malocclusion could be related to the formation of wedge—shaped defects. Conclusion Overload and dysfunction occlusal force could have relation to the progression of wedge—shaped defects.

【Key words】 wedge—shaped defects;occlusion;middle—aged and elderly。

众所周知楔状缺损病因及发病机制至今仍不完全清楚,咬牙合应力疲劳是中外学者们推测的致损病因之一[1,2]。本文的目的是从临床调查中分析楔状缺损错牙合的关系。现报告如下。

1 资料与方法。

从连云港600例做过口腔健康普查的40~65岁老年人中选出符合标准的125例,其中男80例,女45例。选择标准:(1)全口总牙数≥20颗,口腔中任一象限中的尖牙、第一、二双尖牙和第一磨牙缺失≤l颗;(2)尖牙、第一、二双尖牙和第一磨牙颈部非受检牙面数≤2(非受检牙面数指有龋坏、充填体等牙面);(3)牙齿无明显松动、叩痛,牙周附着丧失≤3mm。分组情况:牙齿楔状缺损严重程度按Smith磨损指数TWI(tooth wear index)分度[3]分为4组,即无楔状缺损组:全口无楔状缺损患牙;轻度楔状缺损组(轻组):至少有一颗楔状缺损TWI为1度的患牙;中度楔状缺损(中组):至少有一颗楔状缺损TWI为2度的患牙;重度楔状缺损(重组):至少有一颗楔状缺损TWI为3度以上的患牙。其中轻中重3组为有楔状缺损组(有楔组)。咬牙合形态分类检查:采用Angle 错牙合分类法[4]将牙合分为正常牙合、安氏Ⅰ类(中性错牙合)、 Ⅱ类(远中错合牙合)、 Ⅲ类(近中错牙合错牙合

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