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Effect of Two Abrasive Systems on Resin Bonding to Laboratory‐Processed Indirect Resin Composite Restorations
Author(s) -
BOUSCHLICHER MURRAY R.,
COBB DEBORAH S.,
VARGAS MARCOS A.
Publication year - 1999
Publication title -
journal of esthetic and restorative dentistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.919
H-Index - 60
eISSN - 1708-8240
pISSN - 1496-4155
DOI - 10.1111/j.1708-8240.1999.tb00398.x
Subject(s) - materials science , wetting , composite material , abrasive , composite number , curing (chemistry) , contact angle , cement
Purpose : This study compared two methods of surface roughening or preparation, with or without the use of proprietary surface wetting agents, to evaluate their effect on resin cement adhesion to the following laboratory‐processed, indirect restorations: Artglass (AG), belleGlass HP (BG), Concept (C), and Targis (T). Methods of surface roughening or preparation included microetching with aluminum oxide (AC): 50 μm at 34 psi and silanized silica coating, CoJet‐Sand (CJ): 30 μm at 34 psi. Artglass and Concept were tested with and without the use of their respective surface wetting agents: Artglass Liquid (AGL) and Special Bond II (SB). Materials and Methods : One hundred twenty specimens, each consisting of a pair of cylinders (7.0 × 3 mm and 4.3 × 3 mm) were fabricated. The larger cylinder or base was embedded in self‐curing resin in a phenolic ring, and bonding surfaces were finished with 320‐grit silicon carbide paper. Specimen pairs for each restorative material were randomly assigned to treatment groups (n = 10) and received the following surface treatments prior to cementation group 1 (AG/AO/+AGL), group 2 (AG/AO/‐AGL), POUP 3 (AG/CJ/+AGL), group 4 (AG/CJ/‐AGL), group 5 (BG/AO), group 6 (BG/CJ), group 7 (C/AO/+SB), group 8 (C/AO/‐SB), group 9 (C/CJ/+SB), group 10 (C/CJ/‐SB), group 11 (T/AO), and group 12 (T/CJ). Specimen pairs were cemented with a dual‐cure resin cement (Dual) and a standardized force of 1 MPa. Specimens were light‐cured 40 seconds per side (80 s total), then thermocycled 300 times at between 5° and 55°C. Shear bond strengths (MPa) were determined using a Zwick Materials Testing Machine at a crosshead speed of 5 mm per minute. Results : One‐way analysis of variance (ANOVA) and Duncan's multiple range test (α= 0.05) by restoration type indicated no significant differences in shear bond strength between BG group 5 (29.8 ± 5.8), BG group 6 (28.3 ± 4.3), T group 11 (29.3 ± 4.9), and T group 12 (29.0 ± 4.4). Shear bond strength in AG group 3 (35.9 ± 3.4) was significantly higher than in AG group 4 (32.4 ± 4.0) and equal to that in AG group 2 (31.9 ± 3.9) and AG group 1 (30.0 ± 3.6). Shear bond strength in C group 10 (24.8 ± 5.7) was equal to that in C group 9 (21.5 ± 2.9), but was higher than in C groups 7 (19.4 ± 3.1) and 8 (19.3 ± 3.4).