In vitro study of the wear behavior of five posterior composite resins
WANG Wan-shan
LI Jing
LI Shi-jie
LI Shi-bao
ZHAO Xin-yi
Abstract：AIM:To investigate the influencing factors on wear resistance of posterior composite resins. METHODS:The specimens for wear test were prepared respectively from Heliomolar HB(A),Solitaire 2(B),Filtek P60(C),Ecusphere-Carat(D),Tetric Ceram HB(E)and amalgam (F).After surface micro-hardness test each specimen was brushed in a V-type dental wear testing machine for 60,000-times under a loading of 3 N and with stain-less-steel ball as the antagonist and fluorite powder as the grinding medium.Then the volume loss and wearing surface roughness of each specimen were measured using a three-dimensional optical profilometer and the wearing surface was observed under SEM.RESULTS:The volume loss ranked as follows:F<C<B≈E≈A<D(P<0.05 ),and the hardness ranked as follows:A <B <D <E <C <F(P<0.05).The wearing surfaces of C and D were flatter and smoother,showing abrasive wear,whereas the wearing surfaces of A,B and E were rougher,showing fatigue wear. The wear loss of the composite resins and the surface roughness after wearing were negatively relevant to their hardness (P<0.05).CONCLUSION:The harder the composite resin is,the higher the wear resistance will be.The surface roughness decreases as the hardness increases.The composite containing more microfillers demonstrates more fatigue wear,while it demonstrates more abrasive wear when it contains less microfillers and more glass fillers.
Keywords：wear resistancehardnessroughnessabrasive wearfatigue wear
Publication Date：2015-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 28-33 )