Shear bond strength between alumina substrate and prosthodontic resin composites with various adhesive resin systems.
BACKGROUND
With the increase in demand for cosmetics and esthetics, resin composite restorations and all-ceramic restorations have become an important treatment alternative. Taking into consideration the large number of prosthodontic and adhesive resins currently available, the strength and durability of these materials needs to be evaluated. This laboratory study presents the shear bond strengths of a range of veneering resin composites bonded to all-ceramic core material using different adhesive resins.


METHODS
Alumina ceramic specimens (Techceram Ltd, Shipley, UK) were assigned to three groups. Three types of commercially available prosthodontic resin composites [BelleGlass®, (BG, Kerr, CA, USA), Sinfony® (SF, 3 M ESPE, Dental Products, Germany), and GC Gradia® (GCG, GC Corp, Tokyo, Japan)] were bonded to the alumina substrate using four different adhesive resins. Half the specimens per group (N = 40) were stored dry for 24 hours, the remaining were stored for 30 days in water. The bonding strength, so-called shear bond strengths between composite resin and alumina substrate were measured. Data were analysed statistically and variations in bond strength within each group were additionally evaluated by calculating the Weibull modulus.


RESULTS
Bond strengths were influenced by the brand of prosthodontic resin composites. Shear bond strengths of material combinations varied from 24.17 ± 3.72-10.15 ± 3.69 MPa and 21.20 ± 4.64-7.50 ± 4.22 at 24 h and 30 days, respectively. BG resin composite compared with the other resin composites provided the strongest bond with alumina substrate (p < 0.01). SF resin composite was found to have a lower bond strength than the other composites. The Weibull moduli were highest for BG, which was bonded by using Optibond Solo Plus adhesive resin at 24 h and 30 days. There was no effect of storage time and adhesive brand on bond strength.


CONCLUSIONS
Within the limitations of this study, the shear bond strengths of composite resins to alumina substrate are related to the composite resins.
Dental Health Department, College of Applied Medical Sciences, King Saud University, Riyadh, Saudi Arabia. aljehaniyousef@gmail.com.
Yousef A
YA
AlJehani
Department of Dental Public Health, School of Dentistry, Case Western Reserve University, Cleveland, OH, 44106, USA. drjaganb@gmail.com.|College of Dentistry, King Saud Bin Abdulaziz University for Health Sciences, King Abdulaziz Medical City, Riyadh, Saudi Arabia. drjaganb@gmail.com.
Jagan K
JK
Baskaradoss
College of Dentistry, King Saud Bin Abdulaziz University for Health Sciences, King Abdulaziz Medical City, Riyadh, Saudi Arabia. dramrithag@gmail.com.
Amrita
A
Geevarghese
College of Dentistry, King Saud Bin Abdulaziz University for Health Sciences, King Abdulaziz Medical City, Riyadh, Saudi Arabia. alshehrymarey@yahoo.com.
Marey A
MA
AlShehry
Department of Biomaterials Science and Turku Clinical Biomaterials Centre, Professor and Chair of Biomaterials Science, Director of Turku Clinical Biomaterials Centre - TCBC, Institute of Dentistry, University of Turku and City of Turku, Welfare Division, Turku, Finland. pekval@utu.fi.
Pekka K
PK
Vallittu
D000537:Aluminum Oxide / Q000737:chemistry*; D002516:Ceramics / Q000737:chemistry; D003188:Composite Resins / Q000737:chemistry*; D001840:Dental Bonding; D045662:Dental Etching / Q000379:methods; D003764:Dental Materials / Q000737:chemistry*; D003801:Dental Veneers; D003890:Desiccation; D006801:Humans; D055115:Light-Curing of Dental Adhesives / Q000379:methods; D008422:Materials Testing; D008689:Methacrylates / Q000737:chemistry; D011109:Polymethacrylic Acids / Q000737:chemistry; D019904:Polymethyl Methacrylate / Q000737:chemistry; D011897:Random Allocation; D019279:Resin Cements / Q000737:chemistry*; D033081:Shear Strength; D013499:Surface Properties; D013696:Temperature; D013997:Time Factors; D014867:Water / Q000737:chemistry
D003188:Composite Resins; D003764:Dental Materials; C470230:Gradia; D008689:Methacrylates; C451600:OptiBond Solo Plus; D011109:Polymethacrylic Acids; C425843:Prime and Bond NT; D019279:Resin Cements; C084018:Scotchbond Multi-Purpose; C477352:Sinfony composite resin; C485628:Stick resin; C110370:belleGlass; D014867:Water; D019904:Polymethyl Methacrylate; D000537:Aluminum Oxide