The effects of toothbrushing force on wedge-shaped defect: An in vitro study
WU Qiao-dan
LIANG Yan
YUAN Yuan-yuan
LI Ning
DAI Yun-jie
LI Hui-lan
ZHAO Xin-yi
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.
Keywords：toothbrushing forcewedge-shaped defectabrasiondentinetoothbrushing
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 89-92 )