不同刷牙压力对牙齿楔形缺损影响的体外研究
The effects of toothbrushing force on wedge-shaped defect: An in vitro study
吴巧丹 1梁燕 1袁媛园 1李宁 1代芸洁 1李蕙兰 1赵信义2
作者信息
- 1. 贵州医科大学口腔医学院,贵州贵阳550004
- 2. 第四军医大学口腔医院口腔材料教研室,陕西西安710032
- 折叠
摘要
目的:观察不同刷牙压力下牙本质磨损情况,分析不同刷牙压力对牙齿楔形缺损形成的影响.方法:取人前磨牙40个,制成40个牙本质试样后,将其随机分为5组(n =8),并置于V型牙刷磨耗试验机上分别在90 g(F90)、110 g(F110)、130 g(F130)、150 g(F150)、170 g(F170)的压力下各磨刷10 000次;然后用三维形貌仪测量各组牙本质的磨损深度、磨损体积和磨耗面粗糙度(Ra),并作相关性分析.结果:5组磨刷压力造成的牙本质磨损深度、磨损体积和Ra均以F90组最低,由低到高依次为F90＜ F110＜ F130＜ F150＜ F170(P＜0.01);相关性分析结果显示,Ra与磨损深度、体积均呈显著正相关性(r＞0.7,P＜0.01).结论:随着磨刷压力的增大,造成的牙本质磨损量也相应增加,牙齿楔形缺损损害加重.
Abstract
AIM:To evaluate the toothbrushing force on dentine abrasion and on wedge-shaped defect formation.METHODS:40 dentine specimens for wear test were prepared from human premolars,the specimens were divided into 5 groups(n =8) and brushed in a V-type dental wear testing machine for 10 000-times under a loading of 90 g(F90),110 g (F110),130 g(F130),150 g(F150) and 170 g(F170) respectively.Then the abrasion depth,abrasion volume and roughness average(Ra) of each specimen were measured using a three-dimensional optical profilometer.RESUITS:The abrasion depth ranked as follows:F90 ＜ F110 ＜ F130 ＜ F150 ＜ F170(P ＜ 0.01);the abrasion volume ranked as follows:F90 ＜ F110 ＜ F130 ＜ F150 ＜ F170 (P ＜ 0.01);Ra ranked as follows:F90 ＜ F110 ＜ F130 ＜ F150 ＜F170(P ＜0.01).There was a correlation between Ra with the abrasion depth and volume (r ＞0.7).CONCLUSION:The bigger the toothbrushing force is,the more the dentine abrasion loss and the more serious the wedgeshaped defect will be.
关键词
刷力/楔形缺损/磨损/牙本质/刷牙Key words
toothbrushing force/wedge-shaped defect/abrasion/dentine/toothbrushing引用本文复制引用
基金项目
贵州省卫生计生委科学技术基金(gzwjkj2014-1-037)
出版年
2017
NETL
NSTL
维普
万方数据