Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2016 Jun;25(4):324-9.
doi: 10.1111/jopr.12304. Epub 2015 May 21.

Veneer Ceramic to Y-TZP Bonding: Comparison of Different Surface Treatments

Omer Kirmali  1 , Alper Kapdan  2 , Alper Kustarci  3 , Kursat Er  3
Affiliations

Veneer Ceramic to Y-TZP Bonding: Comparison of Different Surface Treatments

Omer Kirmali et al. J Prosthodont. 2016 Jun.

Abstract

Purpose: The purpose of this study was to evaluate the effects of various surface-treatment techniques for enhancing the bond strength between veneering ceramic and yttria-stabilized tetragonal zirconia polycrystals (Y-TZP).

Materials and methods: Pre-sintered Y-TZP specimens were divided into eight groups (n = 10) according to the surface-treatment technique used: (a) untreated (control); (b) air abrasion with aluminum oxide particles; (c) erbium, chromium:yttrium-scandium-gallium-garnet (Er,Cr:YSGG) laser irradiation at different energy intensities (1 to 6 W). All specimens were then sintered and veneered with veneering ceramic according to the manufacturer's instructions. The obtained zirconia-ceramic specimens were immersed in 37°C distilled water for 24 hours before a shear bond strength test using a universal testing device at a 1 mm/min crosshead speed. The average values were calculated. After debonding, the Y-TZP surfaces were examined under a stereomicroscope to determine their fracture pattern, and the surface topography was evaluated with scanning electron microscopy after surface treatments.

Results: The bond strength ranged from 13.24 to 20.54 MPa. All surface treatments increased the bond strength between the veneering ceramic and Y-TZP; however, the value for the 6 W irradiation group was significantly different from the values for other groups (p ˂ 0.05).

Conclusions: The present study's findings showed that higher energy densities were needed for the laser irradiation to improve the bond strength between the veneering ceramic and zirconia.

Clinical implication: Y-TZP is commonly used as a core material in fixed restorations. The bond strength between zirconia and the veneering ceramic can be affected by various surface treatments.

Keywords: Er-Cr:YSGG laser; SEM; Yttria-stabilized tetragonal zirconia polycrystal (Y-TZP); dental lasers; shear bond strength; surface treatments; veneering ceramics; zirconia restorations.

PubMed Disclaimer

LinkOut - more resources