Wear resistance of new generation esthetic restorative materials in fixed dental prosthesis

Abstract

ABSTRACT newlineBackground newlineWith an increase in aesthetic demands, the use of all ceramic materials for newlinefixed prosthesis have become the new normal. There are few limitations like newlinewear of the restoration, fractures of the ceramic veneer, colour stability with newlineall ceramics when compared with the gold standard metal ceramic newlinerestorations. With the advancements in CAD-CAM technology, various newer newlinematerials like PEEK (Polyetheretherketone) are being introduced in the field of newlinedentistry which can be used as alternatives to all ceramics. newlineAim newlineTo compare and evaluate the wear resistance, antagonist wear, colour newlinestability and displacement resistance of zirconia layered with ceramic and newlinePEEK layered with indirect composite fixed dental prosthesis. newlineMaterial and Methods newlineThe study evaluated the wear resistance, abrasiveness , colour stability and newlinedisplacement resistance of the PEEK layered with indirect composite FDPs newlineand Zirconia layered with indirect composite FDPs using a chewing simulator newlinewith aging, a Digital Spectrophotometer and a universal testing machine newlinerespectively. A independent sample t test was the statistical analysis newlineperformed using IBM SPSS Version 20. newline11 newlineResults newlineZirconia layered with ceramic FDPs were shown to be two times more newlineabrasive than PEEK layered with indirect composite FDPs (plt0.05). newlineZirconia-ceramic FDPs had twice the wear resistance of PEEK-composite newlineFDPs (plt0.05). There was no difference in the colour stability between the newlinetwo groups (pgt0.05). PEEK-composite FDPs had more displacement newlineresistance than Zirconia-ceramic FDPs (plt0.05). newlineConclusion newlinePEEK-indirect composite FDPs showed less wear resistance than newlinezirconia-ceramic FDPs; however they protected the opposing dentition by newlinecausing minimal wear of the antagonists. There is no significant difference in newlinethe colour stability of PEEK-indirect composite FDPs and zirconia-ceramic newlinefdps. PEEK-indirect composite fdps offer better stress modulation through newlineplastic deformation that make it a promising alternative to Zirconia-ceramic newlinerestorations. newline