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:: Volume 34, Issue 1 (winter 2016) ::
J Dent Sch GYEAR__, 34(1): 34-43 Back to browse issues page
Microtensile Bond Strength of Three Restorative Core Materials with IPS e.max Press Ceramic by Two Resin Cements
M. Mohammadi-bassir , SS. Razavi , MB. Rezvani , H. Labbaf *
Assistant Professor, , Hossinlabbaf2014@gmail.com
Abstract:   (1726 Views)

Objectives: The aim of this study was to compare the microtensile bond strengths (µ TBS) of three core materials with one lithium disilicate reinforced ceramic using two resin cements.

Methods: Three core materials (Nulite F® (Biodental Technologies), Filtek Z250® (3M-ESPE), Prettau-Anterior® (Zirkonzhan, Germany)) were prepared as blocks (10×10×4 mm3) according to the manufacturer’s instructions. Lithium disilicate ceramic blocks were also constructed and bonded to core specimens with two dual curing luting resin cements (Duo-Link® (Schaumburg, IL), Bifix QM® (VOCO, Cuxhaven, Germany)). Micro-bar specimens were prepared and loaded in tension to determine the µ TBS Failure modes were classified by scanning electron microscope (SEM). Data were analysed using two-way ANOVA and Tukey HSD test.

Results: The µ TBS varied significantly depending on the core materials and resin cements used (P< 0.05). The µ TBS of Bifix QM was significantly higher than of Duo-Link in all core materials. The µ TBS of zirconia core was significantly higher than of both composite cores with both resin cements. There were no statistically significant differences among Nulite F and Filtek Z250 (P> 0.05). The highest bond strength was obtained between zirconia core and Bifix QM (45.3 ± 6.7 MPa).

Conclusion: In vitro µ TBS of glass ceramic blocks bonded to zirconia core material showed higher bond strength values than resin-based core material, regardless of the resin cement type used.

Keywords: Core material, Glass ceramic, Microtensile bond strength, Resin cement, Zirconia.
Full-Text [PDF 301 kb]   (370 Downloads)    
Type of Study: Original Article | Subject: Special
Received: 2015/07/26 | Accepted: 2016/01/25
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Mohammadi-bassir M, Razavi S, Rezvani M, Labbaf H. Microtensile Bond Strength of Three Restorative Core Materials with IPS e.max Press Ceramic by Two Resin Cements. J Dent Sch. 2016; 34 (1) :34-43
URL: http://jds.sbmu.ac.ir/article-1-1475-en.html
Volume 34, Issue 1 (winter 2016) Back to browse issues page
مجله دانشکده دندانپزشکی دانشگاه علوم پزشکی شهید بهشتی Shahid Beheshti University Dental Journal
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