Effect of surface conditioning methods on the bond strength of luting cement to ceramics

M Ozcan*, PK Vallittu, Mutlu Özcan, Pekka K. Vallittu

*Corresponding author for this work

    Research output: Contribution to journalArticleAcademicpeer-review

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    Abstract

    Objectives. This study evaluated the effect of three different surface conditioning methods on the bond strength of a Bis-GMA based luting cement to six commercial dental ceramics.

    Methods. Six disc shaped ceramic specimens (glass ceramics, glass infiltrated alumina, glass infiltrated zirconium dioxide reinforced alumina) were used for each test group yielding a total number of 216 specimens. The specimens in each group were randomly assigned to one of the each following treatment conditions: (1) hydrofluoric acid etching, (2) airborne particle abrasion, (3) tribochemical silica coating. The resin composite luting cement was bonded to the conditioned and silanized ceramics using polyethylene molds. All specimens were tested at dry and thermocycled (6.000, 5-55degreesC, 30 s) conditions. The shear bond strength of luting cement to ceramics was measured in a universal testing machine (2 mm/min).

    Results. In dry conditions, acid etched glass ceramics exhibited significantly higher results (26.4-29.4 MPa) than those of glass infiltrated alumina ceramics (5.3-18.1 MPa) or zirconium dioxide (8.1 MPa) (ANOVA, P <0.001). Silica coating with silanization increased the bond strength significantly for high-alumina ceramics (8.5-21.8 MPa) and glass infiltrated zirconium dioxide ceramic (17.4 MPa) compared to that of airborne particle abrasion (ANOVA, P <0.001). Thermocycling decreased the bond strengths significantly after all of the conditioning methods tested.

    Significance. Bond strengths of the luting cement tested on the dental ceramics following surface conditioning methods varied in accordance with the ceramic types. Hydrofluoric acid gel was effective mostly on the ceramics having glassy matrix in their structures. Roughening the ceramic surfaces with air particle abrasion provided higher bond strengths for high-alumina ceramics and the values increased more significantly after silica coating/silanization. 2003 Academy of Dental Materials. Published by Elsevier Ltd. All rights reserved.

    Original languageEnglish
    Pages (from-to)725-731
    Number of pages7
    JournalDENTAL MATERIALS
    Volume19
    Issue number8
    DOIs
    Publication statusPublished - Dec-2003

    Keywords

    • surface conditioning
    • ceramics
    • acid etching
    • silica coating
    • zirconia ceramics
    • alumina ceramics
    • HIGH-PURITY ALUMINA
    • PORCELAIN SURFACE
    • COMPOSITE RESIN
    • DENTAL PORCELAIN
    • DURABILITY
    • LEUCITE
    • METAL
    • CRYSTALLIZATION
    • ZIRCONIA
    • ADHESION

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