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Influence of Surface Treatment on the Shear Bond Strength of Ceramics Fused to Cobalt–Chromium
Author(s) -
Lombardo Geraldo H. L.,
Nishioka Renato S.,
Souza Rodrigo O. A.,
Michida Silvia M. A.,
Kojima Alberto N.,
Mesquita Alfredo M. M.,
Buso Leonardo
Publication year - 2010
Publication title -
journal of prosthodontics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.902
H-Index - 60
eISSN - 1532-849X
pISSN - 1059-941X
DOI - 10.1111/j.1532-849x.2009.00546.x
Subject(s) - materials science , ceramic , cobalt , bond strength , chromium , composite material , bonding strength , shear strength (soil) , bond , metallurgy , business , geology , adhesive , layer (electronics) , finance , soil science , soil water
Purpose: To evaluate the influence of surface treatment on the shear bond strength between a Co‐Cr alloy and two ceramics. Materials and Methods: Forty‐eight metal cylinders were made (thickness: 4 mm, height: 3.7 mm) according ISO TR 11405. The 48 metallic cylinders were divided into four groups (n = 12), according to the veneering ceramic (StarLight Ceram and Duceram Kiss) and surface treatments: air‐particle abrasion with Al 2 O 3 or tungsten drill (W). Gr1: StarLight + Al 2 O 3 ; Gr2: StarLight + W; Gr3: Duceram + Al 2 O 3 ; and Gr4: Duceram + W. The specimens were aged using thermal cycling (3000×, 5 to 55°C, dwell time: 30 seconds, transfer time: 2 seconds). The shear test was performed with a universal testing machine, using a load cell of 100 kg (speed: 0.5 mm/min) and a specific device. The bond strength data were analyzed using ANOVA and Tukey's test (5%), and the failure modes were analyzed using an optical microscope (30×). Results: The means and standard deviations of the shear bond strengths were (MPa): G1 (57.97 ± 11.34); G2 (40.62 ± 12.96); G3 (47.09 ± 13.19); and G4 (36.80 ± 8.86). Ceramic ( p = 0.03252) and surface treatment ( p = 0.0002) significantly affected the mean bond strength values. Conclusions: Air‐particle abrasion with Al 2 O 3 improved the shear bond strength between metal and ceramics used.