Clinical evaluation of two posterior composite resin restorations
HE Zhi-yi
ZHANG Rong
ZHANG Ping-hu
ZHAO Xin-yi
Abstract：AIM:To compare the clinical performance and wear resistance of an universal composite and a posterior composite by a mixed -method approach.METHODS:Z350 XT and P60 composite resin were randomly placed in 66 ClassⅠandⅡcavities respectively in molars(n=33).The restorations were evaluated after 1 -and 6-month according to modified USPHS criteria.Meanwhile,impressions of the restorations were taken using a polyvinyl siloxane impression material and then epoxy resin replicas and stone replicas were prepared for the obseruation of sur-face microstructure under SEMand 3D scanning image to quantify the wear.RESULTS:Z350 XT showed better color matching and surface roughness than P60 (P<0.05)in 1 -and 6-month observation.The surface mean vertical los-ses of Z350 XT and P60 restorations were(40.84 ±14.95)μm and (35.03 ±13.03)μm(P>0.05),and volume los-ses were(1.20 ±0.62)mm3 and(0.68 ±0.43)mm3 respectively(P>0.05).After 1 -and 6-month,the surface of P60 exposed largefillers,resulting ina rougher surfacethan Z350 XT.CONCLUSION:Of Z350 XT universal compos-ite performs better in color match and surface roughness than P60 posterior composite,the wear resistance is not signifi-cantly different between the two composites in 6 months.
Keywords：composite resinposterior restorationclinical evaluationwear resistanceSEM3D scanning
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( 240-244,253 )