中老年人群牙颈部非龋性缺损与面磨损的临床分析

A clinical analysis of the incidences of non-carious cervical lesions and occlusal wear in the middle-aged and elderly

目的:调查中老年人群牙颈部非龋性缺损(NCCL)与牙合面磨损发生情况,并对两者的发病因素和相互关系进行探讨。方法:对568名45岁及以上机关干部,使用Smith和Knight牙齿磨损指数(TWI)进行牙颈部非龋性缺损与牙合面磨损的患病情况调查。结果:该研究人群NCCL的患病率为73.24%,牙合面磨损患病率为87.50%。NCCL和牙合面磨损的患病率和严重程度与性别和年龄相关,发生牙合面磨损的患牙更易发生NCCL,反之亦然(P<0.05)。该人群的磨牙症史、饮食习惯及刷牙方法与NCCL和牙合面磨损的发生没有明显相关性。结论:牙颈部非龋性缺损与牙合面磨损在中老年人中较常见,两者的发生有一定的联系,牙合力、机械摩擦和时间为其发生的共同因素,但加重原因不尽相同。

Objective： To investigate and analyze the incidences of non-carious cervical lesions and occlusal wear in the middle-aged and elderly, their correlations, and the possible risk factors associated with the formation of each. Method： A total of 568 office staff aged 45 years and above were involved. All the patients were examined for the presence and severity of NCCL and occlusal wear using the Tooth Wear Index （TWI）. Result： The prevalence rates of NCCL and occlusal wear were observed 73.24 % and 87.50 % respectively in this population. Both the occurrence rates and tooth wear degrees were significantly related to the gender and the age. The prevalence of teeth with NCCL was significantly higher when the occlusal wear presented, and teeth with occlusal wear were more frequently observed the presence of NCCL （P 〈0.05）. This study did not find significant associations between these two lesions and bruxism, dietary habits, and toothbrushing methods. Conclusion： NCCL and occlusal wear were common phenomena in the middle-aged and elderly. A relationship between the the incidences of each lesion was found. Occlusal force, mechanical friction and age were the common risk factors for NCCL and occlusal wear, but aggravating factors were different.