Bilateral treatment: a strategy for enhancing the mechanical strength of machinable veneers

Dental Materials : Official Publication of the Academy of Dental Materials
Su ChenZhen-ting Zhang

Abstract

To investigate the potential application of bilateral treatment of glazing plus staining in machinable veneer mechanical strength improvement. Standard laminate specimens (n=105) were sliced from machinable ceramic blocks and divided into seven batches for further treatments: (1) batch C, standard specimens; (2) batch P, one specimen surface polished; (3) batch F, fired in glaze-firing-program without glaze; (4) batch G, fired with glaze on one surface; (5) batch S, fired with stain on one surface; (6) batch GA, fired with glaze on one surface, then re-fired in stain-firing-program without stain, and (7) batch GS, fired with glaze on one surface then fired with stain on the other side. The flexural strength of all specimens was tested with a three-point-bending test and the results statistically evaluated. Scanning electron microscopy (SEM) was used to analyze fractographs of bilateral treatment specimens. X-ray diffraction (XRD) analysis was performed to evaluate the influence of thermal annealing effect on strength improvement in bilateral treatment. The flexural strength of bilateral treated GS (143.23+/-14.02 MPa) was significantly higher (P<0.05) than unilateral treated G (125.92+/-14.01 MPa) and P (114.48+/-8.45 MPa) and ...Continue Reading

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