Two-and three-body dynamic wear performance of dental feldspathic porcelain
SUN Ya-li
ZHANG Shao-feng
ZHENG Xiao-juan
GUO Jia-wen
GUO Zhen-xing
YANG Xue-wei
WANG Xue-song
Abstract：AIM:To investigate the influence of two-body or three -body environment on the dynamic wear behavior of feldspathic porcelain.METHODS:12 cobalt-chromium porcelain rectangular specimens were made and randomly divided into PMMA three-body test group(n=6)and distilled water two-body test group(n=6).The specimens were attached to the jig of oral fatigue wear simulator.10 mm diameter stainless steel balls were served as antagonist cusp.The specimens were subjected to a total of 2.4 million wear cycles at 350 N,4 Hz.For every 3 ×105 wear cycles,the wear depth was measured by 3D profilometer,and then a dynamic wear curve was plotted.Surface to-pography of the porcelain specimens at different wear stages was observed by SEM.RESULTS:In both the two-body and the three-body environment,wear curves and the microstructure of porcelain showed the characteristic stages of“running-in period”,“steady wear period”and“severe wear period”.But in the two-body environment,porcelain had relatively more wear depth,a longer running-in period,and a shorter steady wear period.CONLIUSION:The wear characteristics of porcelain is dynamic.PMMA may play the role of lubricant in wear process making porcelain ex-hibit more moderate tribological properties.
Keywords：dental feldspathic porcelaintwo-body wearthree-body wear3D profilingmicrostructure
Publication Date：2016-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 662-666,671 )