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Microtensile Bond Strength of CAD/CAM Resin Blocks to Dual‐Cure Adhesive Cement: The Effect of Different Sandblasting Procedures
Author(s) -
Tekçe Neslihan,
Tuncer Safa,
Demirci Mustafa,
Kara Dilan,
Baydemir Canan
Publication year - 2019
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/jopr.12737
Subject(s) - adhesive , bond strength , materials science , scanning electron microscope , cement , composite material , dentistry , medicine , layer (electronics)
Purpose To investigate the effect of sandblasting powder particles on microtensile bond strength (μTBS) of dual‐cure adhesive cement to CAD/CAM blocks. Materials and Methods CAD/CAM blocks (Cerasmart, VITA, and LAVA) were cut in slabs and divided into groups: group 1, no sandblasting; group 2, sandblasted with 27‐μm Al 2 O 3 ; group 3, sandblasted with 30‐μm CoJet; group 4, sandblasted with 50‐μm Al 2 O 3 . After sandblasting, all specimens were silanized and luted using dual‐cure adhesive cement (G‐CEM LinkForce). After 24 hours, bonded specimens were cut into 1 ± 0.2 mm 2 sticks, and μTBS values were obtained (N = 30). Additionally, 132 CAD/CAM block sections were prepared for surface roughness testing and scanning electron microscopy (SEM) evaluations. Results were analyzed using Kruskal‐Wallis One‐way ANOVA and Dunn's Post Hoc Test ( p < 0.05). Results Group 1 exhibited significantly lower μTBS than the other groups ( p < 0.05). The highest bond strength values were obtained from group 4 ( p > 0.05). For LAVA, μTBS values of specimens that were sandblasted with 50‐μm Al 2 O 3 powder were significantly higher than 30‐μm‐SiO 2 and 27‐μm Al 2 O 3 ( p < 0.05). Conclusions The sand particles investigated (27‐μm Al 2 O 3 , 30‐μm SiO 2 , or 50‐μm Al 2 O 3 ) did not significantly affect μTBS results of CAD/CAM blocks for Cerasmart and VITA, although the results changed significantly for LAVA. The ideal bond protocol for CAD/CAM blocks is specific to the material used.