老年病人磨牙缺失后前磨牙楔形缺损和面磨耗的临床研究

目的:研究前磨牙楔形缺损和面磨耗在磨牙缺失老年病人的发生情况。方法:收集磨牙缺失而前磨牙保留完整的老年病人22例,共174个前磨牙,观察并记录前磨牙楔形缺损和面磨耗的情况。研究设置对照组,即双侧后牙牙弓完整的老年病人20例,共160个前磨牙。比较两组楔形缺损和面磨耗的发生情况并进行统计学分析。结果:磨牙缺失组中,前磨牙2度以上楔形缺损144个,检出率83%,面磨耗至牙本质暴露112个,检出率64%。对照组中,2度以上楔形缺损的前磨牙81个,检出率为51%,牙合面磨耗至牙本质暴露66个,占检出率41%。统计结果显示:磨牙缺失组前磨牙楔形缺损和面磨耗的检出率明显高于对照组(P<0.05)。结论:老年病人磨牙缺失发生楔形缺损和面磨耗较后牙牙弓完整者可能性高。力过大可能是导致前磨牙楔形缺损和面磨耗加重的一个重要原因。

Clinical observation of wedge-shaped defects and occlusal attrition of premolars in elderly patients with missing molars

AIM:To investigate the incidence and characteristics of wedge-shaped defects and occlusal attrition of premolars in elderly patients with missing molars.METHODS:Two groups of elderly people were included in the study.One group(experiment group) had complete premolars,but with unilateral or bilateral missing molars.The other group(control) had complete molars and premolars.Premolars of these two groups were observed to detect wedge-shaped defects or occlusal attrition.The incidence of wedge-shaped defects or occlusal attrition was calculated respectively.Statistical analysis was performed by using software SPSS15.0.RESULTS: 83% premolars were detected with wedge-shaped defects above 2° in experiment group,while 43% were detected in the control population.There is significant difference between the two groups(P<0.05).Exposed dentine caused by attrition was observed in 64% premolars of the experiment group,and the incidence was significantly higher than that of the control group(35%, P<0.05).CONCLUSION:The incidence of dental wedge-shaped defect or occlusal attrition of premolars in elderly people with missing molars is higher than that without missing molars.The occlusion force may be related with the occurrence of wedge-shaped defects and occlusal attrition.