Maryam Ghavam1, Marjan Soleimanpour2, Sedighe Sadat Hashemikamangar3, Hooman Ebrahimi2, Mohammad Javad Kharazifard4. 1. Department of operative dentistry, Dental school, Tehran University of Medical Sciences, Tehran. 2. Dental school, Tehran university of medical sciences, International campus. 3. Department of operative dentistry, Dental school, Tehran university of medical sciences, International campus. 4. Department of epidemiology and biostatistics, Faculty of public health, Tehran University of Medical Sciences, Tehran.
Abstract
OBJECTIVES: This study aimed to assess the microshear bond strength of a repairing self-adhesive flowable composite to ceramic after mechanical, chemical and laser treatment of the ceramic surface. MATERIALS AND METHODS: Forty zirconia and forty feldspathic ceramic blocks measuring 8 x 8 x 2 mm were fabricated. Feldspathic blocks were divided into four groups of control (1), laser (2780 nm) (2), sandblasting + hydrofluoric (HF) acid + silane (3) and laser (2780 nm) + HF acid + silane (4). Zirconia blocks were also divided into four groups of control (1), laser (2780 nm) (2), sandblasting + Z-Prime Plus (3) and laser (2780 nm) + Z-Prime Plus (4). Vertise Flow composite was bonded to treated ceramic surfaces as a repairing material, then the samples were subjected to 1000 thermal cycles. Repair bond strength was measured by Instron machine and data were analyzed using one-way ANOVA and post hoc test (P < 0.05). RESULTS: Maximum and minimum bond strength values were observed in zirconia-control (22.57 ± 4.76 MPa) and feldspathic-control (8.65 ± 6.41 MPa) groups, respectively. There was no significant differences between subgroups within the zirconia or feldspathic groups (P > 0.05), however the bond strength of zirconia subgroups was significantly higher than that of feldspathic subgroups. CONCLUSION: Vertise Flow provides relatively good bond strength to ceramic even with no surface treatment.
OBJECTIVES: This study aimed to assess the microshear bond strength of a repairing self-adhesive flowable composite to ceramic after mechanical, chemical and laser treatment of the ceramic surface. MATERIALS AND METHODS: Forty zirconia and forty feldspathic ceramic blocks measuring 8 x 8 x 2 mm were fabricated. Feldspathic blocks were divided into four groups of control (1), laser (2780 nm) (2), sandblasting + hydrofluoric (HF) acid + silane (3) and laser (2780 nm) + HF acid + silane (4). Zirconia blocks were also divided into four groups of control (1), laser (2780 nm) (2), sandblasting + Z-Prime Plus (3) and laser (2780 nm) + Z-Prime Plus (4). Vertise Flow composite was bonded to treated ceramic surfaces as a repairing material, then the samples were subjected to 1000 thermal cycles. Repair bond strength was measured by Instron machine and data were analyzed using one-way ANOVA and post hoc test (P < 0.05). RESULTS: Maximum and minimum bond strength values were observed in zirconia-control (22.57 ± 4.76 MPa) and feldspathic-control (8.65 ± 6.41 MPa) groups, respectively. There was no significant differences between subgroups within the zirconia or feldspathic groups (P > 0.05), however the bond strength of zirconia subgroups was significantly higher than that of feldspathic subgroups. CONCLUSION: Vertise Flow provides relatively good bond strength to ceramic even with no surface treatment.
Authors: M Helvatjoglu-Antoniades; Y Papadogiannis; R S Lakes; P Dionysopoulos; D Papadogiannis Journal: Dent Mater Date: 2005-08-11 Impact factor: 5.304
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