非龋性颈部缺损病人口腔习惯调查及牙合接触特征分析

Analysis of oral habits and occlusal contact characteristics in patients with non-carious cervical lesions

目的:调查和分析非龋性颈部缺损(NCCL)病人口腔习惯及牙合接触特征,探讨NCCL发生的危险因素。方法:选取NCCL病人(NCCL组)29例,按性别和年龄匹配无NCCL的志愿者58名(对照组),进行刷牙频率、刷牙方式、食用酸性食物/碳酸饮料的频率、夜磨牙或紧咬牙等口腔习惯问卷调查。NCCL组受试者口内选取29颗患牙,以对侧同名牙为对照牙,应用T-scanⅢ系统测量分析正中、前伸与侧方运动中的咬合参数。结果:刷牙频率、刷牙方式、食用酸性食物/碳酸饮料的频率在2组间差异均无统计学意义(P>0.05);NCCL组受试者夜磨牙或紧咬牙的比例明显高于对照组(P<0.01)。T-scanⅢ咬合参数结果显示,NCCL患牙所在侧正中牙合、前伸牙合单侧整体牙合力百分比均高于对照侧(P<0.01和P<0.05);侧方牙合时患侧为工作侧牙合分离时间高于对照侧为工作侧的时间(P<0.05);NCCL患牙正中牙合力百分比,侧方牙合、前伸牙合力百分比峰值均高于对照牙(P<0.05~P<0.01)。NCCL患牙正中牙合早接触与咬合高点发生率均高于对照牙(P<0.01和P<0.05)。结论:NCCL病人夜磨牙或紧咬牙的口腔习惯及患牙在咬合运动中承担的创伤牙合力可能是颈部缺损的危险因素。

Objective:To investigate and analyze oral habits and occlusal contact characteristics in patients with non-carious cervical lesions(NCCL)and discuss the risk factors of NCCL.Methods:A total of 29 NCCL patients(NCCL group)were selected,and 58 volunteers without NCCL were matched according to gender and age(control group).Questionnaire on oral habits such as frequency of brushing,brushing style,frequency of acidic food/carbonated beverages consumption,night grinding or clenching of teeth was performed.Twenty-nine affected teeth were selected intraorally from the subjects in the NCCL group,with the contralateral same-named tooth as the control tooth,and the occlusal parameters were measured and analyzed in orthodromic,anterior and lateral movements by applying the T-scanⅢsystem.Results:There is no significant correlation between NCCL and the frequency of brushing,technique of brushing,acid diet(P>0.05).However,the proportion of NCCL subjects with night bruxism or tooth clinching was significantly higher than the control subjects(P<0.01).The results of T-scanⅢocclusion parameters showed that the percentages of overall force in the centric occlusion and protrusion occlusion of NCCL sides were higher than those of the control sides(P<0.01 and P<0.05).The disclusion time of NCCL sides as working sides in lateral occlusion was higher than that of the control sides as working sides(P<0.05).The occlusal force of NCCL teeth in centric occlusion,protrusion occlusion and lateral occlusion were higher than those of the control teeth(P<0.05 to P<0.01).The incidence of premature contact and high occlusal point in NCCL teeth was higher than control teeth(P<0.01 and P<0.05).Conclusions:The oral habit of tooth clinching or bruxism in NCCL patients and the traumatic occlusion force of the affected teeth during occlusal contacts may be risk factors for cervical lesions.