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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

MICROTENSILE BOND STRENGTH OF NEW SELF-ADHESIVE LUTING AGENTS AND CONVENTIONAL MULTISTEP SYSTEMS

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Author(s):
Viotti, Ronaldo G. [1, 2] ; Kasaz, Alline [1] ; Pena, Carlos E. [1] ; Alexandre, Rodrigo S. [1] ; Arrais, Cesar A. [1] ; Reis, Andre F. [1]
Total Authors: 6
Affiliation:
[1] Univ Guarulhos, Dept Operat Dent, Sch Dent, BR-07011040 Sao Paulo - Brazil
[2] Blumenau Reg Univ, Blumenau, Santa Catarina - Brazil
Total Affiliations: 2
Document type: Journal article
Source: JOURNAL OF PROSTHETIC DENTISTRY; v. 102, n. 5, p. 306-312, NOV 2009.
Web of Science Citations: 88
Abstract

Statement of problem. Several self-adhesive luting agents have recently been introduced on the market. It is crucial to know the effectiveness of such luting agents prior to their clinical application. Purpose. The purpose of this study was to evaluate the microtensile bond strengths (mu TBS) produced by different self-adhesive cements and compare them with conventional luting agents. Material and methods. Six self-adhesive cements (RelyX Unicem (UN), RelyX U100 (UC), SmartCem 2 (SC), G-Cem (GC), Maxcem (MC), and SeT (SET), and 2 conventional luting agents, one that uses a 2-step etch-and-rinse adhesive (RelyX ARC (RX)), and one that uses a 1-step self-etching adhesive (Panavia F (PF)), were used in this study. An additional group included the use of a 2-step self-etching primer adhesive system (Clearfil SE Bond) prior to the application of Panavia F (PS). Fifty-four human molars were abraded to expose occlusal surfaces and were assigned to 9 groups according to the luting material (n=6). Five composite resin (Filtek 2250) discs (12 mm in diameter, 5 mm thick) were cemented on the teeth according to manufacturers' instructions. After 24 hours of water storage, restored teeth were serially sectioned into beams with a cross-sectional area of approximately 1 mm(2) at the bonded interface and were tested in tension with a crosshead speed of 1 mm/min. Failure mode was determined using scanning electron microscopy. Data were statistically analyzed by 1-way ANOVA and Tukey's studentized range HSD test (alpha=.05). Results. Mean bond strengths (SD) in MPa were: RX, 69.6 (16.6)(A); PS, 49.2 (9.7)(A); PF, 33.7 (13.9)(AB); GC, 16.9 (10.3)(BC); UC, 15.3 (3.4)(BC); UN, 12.5 (2.4)(C); MC 11.5 (6.8)(CD); SC, 8.5 (4.9)(CD); SET, 4.6 (0.5)(D). Groups with different uppercase letters were significantly different from each other (P<.05). The predominant failure mode of the self-adhesive cements was adhesive between the resin cement and dentin. Conclusions. The bond strengths produced by the multistep luting agents were significantly higher than those observed for most self-adhesive cements. (J Prosthet Dent 2009;102:306-312) (AU)

FAPESP's process: 07/06083-4 - Long-term evaluation of the bond strength, nanoleakage patterns and ultramorphological characteristics of resin-dentin interfaces produced by self-adhesive cements
Grantee:André Figueiredo Reis
Support type: Regular Research Grants
FAPESP's process: 07/06447-6 - Long-term evaluation of the bond strength, nanoleakage patterns and ultramorphological characteristics of resin-dentin interfaces produced by self-adhesive cements
Grantee:Alline de Cerqueira Kasaz
Support type: Scholarships in Brazil - Master