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Shear Bond Strength between Veneered Ceramics and Core Materials for Esthetic Restorations

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Shear Bond Strength between Veneered Ceramics and Core Materials for Esthetic Restorations

Ki-Won Kim, Hang-Min Park, In-Sung Chung

Department of Dental Laboratory Science, College of Health Science, Catholic University of Pusan, Busan 609-757

Esthetic restorations have been widely used in dental practice, although many studies have focused on the development and improvement of all ceramic restorations. The success of esthetic restorations depends primarily on an optimal bond strength between various veneered ceramics and core materials for esthetic restorations.

The purpose of this study was to compare the shear bond strength between various veneered ceramics and core materials for esthetic restorations.

30 metal cores and 20 zirconia cores were fabricated and divided into five groups according to veneered ceramic materials such as Creation porcelain powder, Cercon Ceram Kiss, and IPS e.max ZirPress.

Thirty spacimens were prepared using Creation porcelain powder, veneered 3 height and 3 in diameter, over the metal cores (n=10).

Twenty specimens were prepared using Cercon Ceram Kiss and Zirpress, veneered 3 height and 3 in diameter, over the zirconia cores (n=10). The shear bond strength test was performed in a universal testing machine with a crosshead speed of 1 /min. Ultimate shear bond strength data were analyzed with One-way ANOVA and the Scheffe’s test (p=.05).

Within the limits of this study, the following conclusions were drawn:

The mean shear bond strengths ( ) were: 18.44 for Uni metal VH/Creation (NCUC); 18.72 for Heraenium/Creation (NCHC); 16.23 for Wirobond C/Creation (NCWC); 13.88 for Zirconia core/110 Al 2 O 3 sandblasting/Cercon Ceram Kiss (ZS110P); 14.61 for Zirconia core/No surface treatment/IPS e.max ZirPress (ZNTH). The mean shear bond strength for NCUC (Uni metal VH/Creation), NCHC (Heraenium/Creation) and NCWC (Wirobond C/Creation) were significantly superior to ZS110P (Zirconia core/110 Al 2 O 3

sandblasting/Cercon Ceram Kiss) and ZNTH(Zirconia core/No surface treatment/IPS e.max ZirPress) (p<0.05).

[Abstract]

Key word : Nickel-chromium alloy, Cobalt-chromium alloy, Zirconia core, Cercon Ceram Kiss, Zirpress, Shear

bond strength

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