Premium
Microtensile Bond Strength of a Resin Cement to Silica‐Based and Y‐TZP Ceramics Using Different Surface Treatments
Author(s) -
Keshvad Alireza,
Hakimaneh Seyed Mohammad Reza
Publication year - 2018
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.12622
Subject(s) - materials science , bond strength , composite material , cement , ceramic , bond , layer (electronics) , adhesive , business , finance
Purpose To evaluate the effects of different surface treatments on the microtensile bond strength (μTBS) of bonding between resin cement and lithia or zirconia‐based ceramics using an in vitro study. Materials and Methods Three zirconia ceramic blocks (IPS e.max ZirCAD) and three lithium disilicate ceramic blocks (IPS e.max CAD) were sintered and duplicated in resin composite. The zirconia specimens underwent various treatments (n = 1): (i) Sandblast + primer (ZiSa); (ii) sandblast + laser irradiation + primer (ZiSaLa); or (iii) laser irradiation + primer (ZiLa). The lithium disilicate specimens also underwent various treatments: (i) sandblast + HF + silane (LiSaE); (ii) sandblast + silane (LiSa); or (iii) sandblast + laser irradiation + silane (LiSaLa). The ceramic–composite blocks were cemented with resin cement and cut to produce bars with approx. 1 mm 2 bonding areas. The specimens were thermocycled, and bond strength tests were performed in a universal testing machine. The fracture type was determined by observing the fractured surface under a stereomicroscope. The mean bond strengths of the specimens were statistically analyzed using one‐way ANOVA and Duncan's tests (α = 0.05). Results Mean comparison of the μTBS showed no significant difference between LiSaE and LiSa ( p > 0.05), but significant differences between LiSaE and other groups ( p ≤ 0.01). No significant differences were found between the ZiSaLa and ZiSa groups ( p > 0.05). The modes of failure in all groups were mostly adhesive (57% to 80%). The mean bond strengths in laser‐irradiated ceramics were significantly lower than those from other surface treatments. All ZiLa specimens debonded before testing (pretest failure). Conclusions Lithium disilicate ceramic surface treated with a combination of sandblasting and silane application provided a bond strength comparable to that provided by sandblasting in combination with acid etching and applying silane. Groups treated with laser irradiation had significantly lower bond strengths than other groups.