Resistência à tração de pinos de fibra paralelos e cônicos cimentados com diferentes proporções de catalisador de um cimento de dupla ativação
Tensile strength of parallels and tapered fiber post luted with different ratios of a catalyst of a dual-cure cement
Salgueiro, M.C.C.; Araújo, C.T.P.; Dias, C.T.S.; Pereira, G.D.S.; Paulillo, L.A.M.S.
Rev. odontol. UNESP, vol.37, n3, p.243-248, 2008
Resumo
Este estudo avaliou a resistência à tração de pinos de fibra de vidro cimentados com um cimento de dupla ativação com diferentes proporções de catalisador e a influência da forma do pino passivo na resistência à tração. Sessenta raízes de incisivos bovinos foram divididas em seis grupos experimentais (n = 10). As raízes foram desobturadas e em seguida os pinos foram cimentados utilizando o cimento resinoso Rely X (3M ESPE) com diferentes proporções base/catalisador – b/c, de acordo com o grupo experimental: G1: pinos Ângelus / proporção b/c 1:1; G2: pinos Ângelus / proporção b/c 1:2; G3: pinos Ângelus / proporção b/c 1:3; G4: pinos Bisco/ proporção b/c 1:1; G5: pinos Bisco / proporção b/c 1:2; G6: pinos Bisco / proporção b/c 1:3. O teste de resistência à tração foi realizado na máquina de ensaio universal Instron. Os dados obtidos foram submetidos à análise de variância e teste de Tukey. Foi observado que o pino paralelo serrilhado da Ângelus apresentou média de resistência à tração (39,0 kgf) significantemente maior do que a média do pino Bisco (28,4 kgf). Já em relação à proporção, a maior média de resistência à tração foi apresentada pela proporção de 1 parte de base para 3 partes de catalisador (39,6 kgf) com diferença significativa das proporções de 2:1 (31,5 kgf) e 1:1 (29,8 kgf). Pode-se concluir que o pino paralelo e serrilhado apresentou maior resistência à tração, e, triplicando a proporção de catalisador em relação à base, a força de resistência aumentou, independentemente da forma do pino.
Palavras-chave
Cimento resinoso, pinos de fibra de vidro, sistema adesivo
Abstract
This study evaluated the tensile bond strength of glass fiber posts cemented with different catalyst ratios and its influence by the passive shape on the tensile bond strength. Sixty bovine incisors were used and divided into six experimental groups (n = 10). The roots canal were desobtured and then the posts were cemented with RelyX dual cure luting (3M ESPE) using different ratios of base/catalyst (b/c) according to experimental groups: G1: Angelus Post with 1:1 of b/c ratio; G2: Angelus Post with 1:2 of b/c ratio; G3: Angelus Post with 1:3 of b/c ratio; G4: Bisco Post with 1:1 of b/c ratio; G5: Bisco Post with 1:2 of b/c ratio; G6: Bisco Pos with 1:3 of b/c ratio. The tensile bond strength values (39.0 kgf) was performed into the Universal Test Machine (Instron). The data were submitted to ANOVA test and Tukey test. According to results the Ângelus parallel threaded fiber posts presented mean bond strength values (39.0 kgf) significantly highest than the mean of the Bisco fiber posts (28.4 kgf). However in relation the ratio, the highest mean bond strength values were achieved for the ratio of 1 part of base to 3 parts of catalyst (39.6 kgf) with significant differences when compared to the ratios of 2:1 (31.5 kgf) and 1:1 (29.8 kgf). It can be concluded that the parallel threaded fiber posts presented the highest mean bond strength values, and when the catalyst was used at its triplicated proportion the tensile bond strength increased independent of post factor.
Keywords
Resin cement, glass fiber posts, adhesive system
References
1. Fraga RC, Chaves BT, Mello GSB, Siqueira Jr JF. Fracture resistance of endodontically treated roots after restoration. J Oral Rehabil. 1998;25: 809-13.
2. Watzke R, Blunck U, Frankenberger R, Naumann M. Interface homogeneity of adhesively luted glass fiber posts. Dent Mater. 2008 May 6. [Epub ahead of print]
3. Perdigão J, Gomes G, Lee IK. The effect of silane on the bond strengths of fiber posts. Dent Mater. 2006;22:752-8.
4. Christensen GJ. Post and cores: state of the art. J Am Dent Assoc. 1998;129: 96-7.
5. Duret B, Reynaud M, Duret F. A new concept of corono-radicular reconstruction, the Composipost (2). Chir Dent Fr. 1990;60(542):69-77.
6. Lambjerg-Hansen H, Asmussen E. Mechanical properties of endodontic posts. J Oral Rehabil. 1997;24: 882-7.
7. Dietschi D, Romeli M, Goretti A. Adaptation of adhesive posts and cores to dentin after fatigue testing. Int J Prosthodont. 1997;10:498-507.
8. Asmussem E, Peutzfeldt A, Heimann T. Stiffness, elastic limit, and strength of newer types of endodontic posts. J Dent. 1999;27: 275-28.
9. Musikant BL, Deutsch AS. A new prefabricated post and core system. J Prosthet Dent. 1984;52:631-4.
10. Rueggeberg FA, Caughman WF. The influence of light exposure on polymerization of dual-cure resin cements. Oper Dent. 1993;18:48-55.
11. Kececi AD, Kaya U, Adanir N. Micro push-out bond strengths of four fiber-reinforced composite post systems and 2 luting materials. Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 2008;105:121-8.
12. Peutzfeldt A. Dual-cure resin cements: in vitro wear and effect of quantity of remaining double bonds, filler volume, and light curing. Acta Odontol Scand. 1995;53:29-34.
13. Lui JL. Depth of composite polymerization within simulated root canals using light-transmitting posts. Oper Dent. 1994;19:165-8.
14. Sanares AME, Itthagarun A, King NM, Tau FR, Pashley DH. Adverse surface interactions between one-bottle light-cure adhesives and chemical-cure composites. Dent Mater. 2001;17:542-56.
15. Vichi A, Grandini S, Davisdson CL, Ferrari M. An SEM evaluation of several adhesive systems used for bonding fiber posts under clinical conditions. Dent Mater. 2002;18:495-502.
16. Tay FR, Suh BI, Pashley DH, Prati C, Chuang S, Li F. Factors contributing to the incompatibility between simplified-step adhesives and self-cured or dual-cured composites: single-bottle, total-etch adhesive. J Adhes Dent. 2003;5(Pt II):91-105.
17. Arikawa H, Kanie T, Fujji K, Shinohara N. Bonding strength and depth of cure of light-cured composite resins irradiated using filters simulate enamel. J Oral Rehabil. 2004;31:74-80.
18. Sorensen JA, Martinoff JT. Intracoronal reinforcement and coronal coverage: a study of endodontically treated teeth. J Prosthet Dent. 1984;51:780-4.
19. Teixeira EC, Teixeira FB, Piasick JR, Thompson JY. An in vitro assessment of prefabricated fiber post systems. J Am Dent Assoc. 2006;137:1006-12.
20. De Deus QD. Endodontia. 5ª ed. Rio de Janeiro: Medsi; 1992.
21. Hofmann N, Papsthart G, Hugo B, Klairber B. Comparison of photo-activation versus chemical or dual-curing of resin-based luting cements regarding flexural strength, modulus and surface hardness. J Oral Rehabil. 2001;28:1022-8.
22. Kanno T, Ogata M. Microtensile Bond strength of dual-cure resin cement to root canal dentin with different curing strategies. Dent Mater J. 2004;23:550-6.
23. Ferrari M, Mannocci F. A ‘one-bottle’ adhesive system for bonding a fiber post into a root canal: SEM evaluation oh the post-resin interface. Int Endod J. 2000; 33:397-400.
24. Pest LB, Cavalli G, Bertani P, Gagliani M. Adhesive post-endodontic restorations with fiber post: push-out tests and SEM observations. Dent Mater. 2002;18:596-602.
25. Nakabaiashy N, Kojima K, Masuhara E. The promotion of adhesion by the infiltration of monomers into tooth substrates. J Biomed Mater Res. 1982;16:265-73
26. Ruyter IE. Unpolymerized surface layers on sealants. Acta Odontol Scand. 1981; 39:27-32.
27. Rueggeberg FA, Margeson DH. The effect of oxygen inhibition on an unfilled/filled composite system. J Dent Res. 1990;69:1652-8.
28. Finger WJ, Osada T, Tani C, Endo T. Compatibility between self-etching adhesive and self-curing resin by addition of anion exchange resin Dent Mater. 2005;21:1044-50.
29. Asmussem E, Peutzfeldt A. Bonding of dual-curing resin cements to dentin. J Adhes Dent. 2006;8:299-304.
30. Kanehira M, Finger WJ, Hoffmann M, Komatsu M. Compatibility between an all-in-one self-etching adhesive and a dual-cured resin luting cement. J Adhes Dent. 2006;8:229-32.
31. Yamauchi J. Study of dental adhesive containing phosphoric acid methacrylate monomer. Journal of the Japanese Society for Dental Materials and Devices. 1986;5:144-54.
32. Oster A. On special education in surgery Ugeskr Laeger. 1969;11:1036.
Facebook
Google+
Twitter
LinkedIn
Mendeley
StumbleUpon
CiteULike
Reddit
Email