中老年人磨牙面过敏的磨耗调查

The study on the attrition of molars with occlusal hypersensitivity molars in elderly people

目的调查老龄齿面过敏的磨耗形态及程度。方法以面牙本质过敏的老年患者（４７～７４岁）的１１３颗患牙为对象，以Ｌａｖｅｌｅ的分类为标准。调查其磨耗状况，并行统计学分析。结果当磨耗累及达２个牙尖并融合的ｅ型时，患病率显著上升，占调查总数的１９４７％；到累及融合４个牙尖的ｇ型时达最高峰，占总数的４１５９％。患病率在第一磨牙占４８６７％，在第二磨牙占５１３３％。过敏点发生在釉牙本质界占５３１０％，在面凹点占３８０５％。结论牙本质过敏与磨耗呈正相关，第一磨牙与第二磨牙相比差异无显著性；过敏点发生在釉牙本质界者显著多于面凹点者（Ｐ＜０．０５）。

Objective To investigate the attrition of molars in old people who suffered from occlusal hypersensitivity. Methods 113 maxillary and mandibular molars of old people (47～74 years old) who had dentine hypersensitivity caused by attrition were studied. The Lavelle's criteria were used. Results When the attrition reached to the e type, the rate of lesion rose up quickly (19.47%), the highest incidence was seen in g type (41.59%). The hypersensitivity occurred as 48.67% in the first molar, 51.33% in the second molar, 53.10% in enameldentin junction, and 38.05% in dentine concave site. Conclusion The rate of hypersensitivity rises with the severity of attrition. There is no significant difference between the first molar and the second molar, but the incidence of hypersensitivity in enameldentin junction is significantly higher than in dentine concave site (P<0.05).