Improvement of Bond Strength between Zirconia Framework and Veneering Porcelain

Yuhui Chen,Chuhua Tang

doi:10.4172/2161-1122.1000352

Abstract

A series of specimens with different surface morphology, pre-sintering process, and sintering temperature were designed for studying the improvement of bond strength between zirconia framework and veneering porcelain. Shear strength test, Scanning Electron Microscope (SEM), and Energy Dispersive Spectrometer (EDS) were adopted in the investigation. A remarkably enhance of average bond strength from 24.1 MPa to 37.2 MPa was obtained by performing humps on zirconia substrate. Moreover, a pre-sintering process for bonding porcelain was beneficial to the increasing of bond strength. Hence, during all-ceramic dental restoration fabrication, it is promising to perform surface treatment on zirconia and conduct pre-sintering procedure on bonding porcelain for the improvement of bond strength between zirconia framework and veneering porcelain.

Highlights

IntroductionThe defect and absence of tooth is a common disease with a high morbidity of 24-53% in dental treatment
Clinical statistics show that, the defect and absence of tooth is a common disease with a high morbidity of 24-53% in dental treatment
It is safe to say that, the striations made no obvious difference to the bond strength, while humps in the surface of zirconia substrate remarkably enhanced the bond strength between zirconia substrate and veneering porcelain

Summary

Introduction

The defect and absence of tooth is a common disease with a high morbidity of 24-53% in dental treatment. It is promising to develop dental restoration materials with favorable mechanical strength and excellent bio-safety [1,2,3,4]. With the increasing esthetic requirement from patients and the development of CAD/CAM (Computer Aided Design/Computer Aided Manufacturing) technique, various all-ceramic materials have been adopted in dental restoration for their aesthetical potential [5,6,7]. Zirconia based materials possess most promising prospects due to their fascinating aesthetic performance, favorable biocompatibility, and superior mechanical property [8]. The excellent mechanical strength of Y-TZP originated from the crystalline phase transformation from a tetragonal to a monoclinic structure. Due to unsatisfying translucency of Y-TZP, a bilayered structure consisting of a zirconia substrate and a brittle glass-ceramic veneering layer is frequently used to improve the aesthetical appearance of zirconia prosthesis

Methods

Results

Conclusion