Paper Information

Journal:   JOURNAL OF DENTAL SCHOOL SHAHID BEHESHTI UNIVERSITY OF MEDICAL SCIENCE   2016 , Volume 34 , Number 1; Page(s) 34 To 43.
 
Paper: 

MICROTENSILE BOND STRENGTH OF THREE RESTORATIVE CORE MATERIALS WITH IPS E.MAX PRESS CERAMIC BY TWO RESIN CEMENTS

 
 
Author(s):  MOHAMMADI BASSIR MAHSHID, RAZAVI SEYYEDEH SHAGHAYEGH, REZVANI MOHAMMAD BAGHER, LABBAF HOSSEIN*
 
* DEPT. OF ENDODONTICS, SCHOOL OF DENTISTRY, SHAHED UNIVERSITY, TEHRAN, IRAN
 
Abstract: 

Objective: The aim of this study was to compare the micro tensile bond strengths (m 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 ? TBS Failure modes were classified by scanning electron microscope (SEM). Data were analysed using two-way ANOVA and Tukey HSD test.
Results: The
m TBS varied significantly depending on the core materials and resin cements used (P < 0.05). The m TBS of Bifix QM was significantly higher than of Duo-Link in all core materials. The m 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
m 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.

 
Keyword(s): CORE MATERIAL, GLASS CERAMIC, MICRO TENSILE BOND STRENGTH, RESIN CEMENT, ZIRCONIA
 
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