1급 와동에서 상아질과 복합레진의 결합강도에 대한 중합방법의 효과
THE EFFECT OF DIFFERENT CURING MODES ON COMPOSITE RESIN/DENTIN BOND STRENGTH IN CLASS ICAVITIES
1
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
The purpose of this study was to compare the microtensile bond strength in Class I cavities associated with different light curing modes of same light energy density. Occlusal enamel was removed to expose a flat dentin surface and twenty box-shaped Class I cavities were prepared in dentin. Single Bond (3M Dental product) was applied and Z 250 was inserted using bulk technique. The composite was light-cured using one of four techniques; pulse delay (PD group), soft-start (SS group), pulse cure (PC group) and standard continuous cure (CC group). The light-curing unit capable of adjusting time and intensity (VIP, Bisco Dental product) was selected and the light energy density for all curing modes was fixed at 16 J/㎠. After storage for 24 hours, specimens were sectioned into beams with a rectangular cross-sectional area of approximately 1 ㎟. Microtensile bond strength (μTBS) test was performed using a universal testing machine (EZ Test, Shimadzu Co.). The results were analyzed using oneway ANOVA and Tukey’s test at significance level 0.05. The μTBS of PD group and SS group was higher than that of PC group and CC group. Within the limitations of this in vitro study, modification of curing modes such as pulse delay and soft start polymerization can improve resin/dentin bond strength in Class I cavities by controlling polymerization velocity of composite resin.
Abstract
The purpose of this study was to compare the microtensile bond strength in Class I cavities associated with different light curing modes of same light energy density. Occlusal enamel was removed to expose a flat dentin surface and twenty box-shaped Class I cavities were prepared in dentin. Single Bond (3M Dental product) was applied and Z 250 was inserted using bulk technique. The composite was light-cured using one of four techniques; pulse delay (PD group), soft-start (SS group), pulse cure (PC group) and standard continuous cure (CC group). The light-curing unit capable of adjusting time and intensity (VIP, Bisco Dental product) was selected and the light energy density for all curing modes was fixed at 16 J/㎠. After storage for 24 hours, specimens were sectioned into beams with a rectangular cross-sectional area of approximately 1 ㎟. Microtensile bond strength (μTBS) test was performed using a universal testing machine (EZ Test, Shimadzu Co.). The results were analyzed using oneway ANOVA and Tukey’s test at significance level 0.05. The μTBS of PD group and SS group was higher than that of PC group and CC group. Within the limitations of this in vitro study, modification of curing modes such as pulse delay and soft start polymerization can improve resin/dentin bond strength in Class I cavities by controlling polymerization velocity of composite resin.
참고문헌 (27)
- Lu H, "Towards the elucidation of shrinkage stress development and relaxation in dental composites", Dent Mater, 20, pp.979~986 (2004)
- Davidson CL, "The competition between the composite- dentine bond strength and the polymerization contraction", J Dent Res, 63, pp.1396~1399 (1984)
- Munro GA, "In vitro microleakage of etched and rebonded class 5 composite resin restorations", Oper Dent, 21, pp.203~208 (1996)
- Ramos RP, "Effect of three surface sealants on marginal sealing of class V composite resin restorations", Oper Dent, 25, pp.448~453 (2000)
- Uno S, "Contraction stress and marginal adaptation of composite restorations in dentinal cavity", Dent Mater, 13, pp.19~24 (1997)
- Labella L, "Polymerization shrinkage and elasticity of flowable composites and filled adhesives", Dent Mater, 15, pp.128~137 (1999)
- Pfeifer CSC, "Pulse-delay curing: influence of initial irradiance and delay time on shrinkage stress and microhardness of restorative composites", Oper Dent, 31, pp.610~615 (2006)
- Hofmann N, "The influence of plasma arc vs halogen standard or soft-start irradiation on polymerization shrinkage kinetics of polymer matrix composites", J Dent, 31, pp.383~393 (2003)
- Feilzer AJ, "Influence of light intensity on polymerization shrinkage and inegrity of restoration-cavity interface", Eur J Oral Sci, 103, pp.322~326 (1995)
- Cristiane MA, "The effect of light-curing source and mode on microtensile bond strength to bovine dentin", J Adhes Dent, 8, pp.41~45 (2006)
- Yap AU, "Soft start polymerization: influence on effectiveness of cure and post-gel shrinkage", Oper Dent, 26, pp.260~266 (2001)
- Halvorson RH, "Energy dependent polymerization of resin-based composite", Dent Mater, 18, pp.463~469 (2002)
- Bouillaguet S, "Bonding characteristics to dentin walls of Class II cavities, in vitro", Dent Mater, 17, pp.316~321 (2001)
- Uno S, "Marginal adaptation of a restorative resin polymerized at reduced rate", J Dent Res, 79, pp.309~319 (2000)
- Irie M, "Marginal gap formation of light activated restorative bond strength", Dent Mater, 18, pp.203~210 (2002)
- Kemp-Scholte CM, "Complete marginal seal of Class V resin composite restorations effected by increased flexibility", J Dent Res, 69, pp.1240~1243 (2000)
- Chye CH, "Post-gel polymerization shrinkage associated with different light curing regimens", Oper Dent, 30(4), pp.474~480 (2005)
- Shono Y, "Regional measurement of resin-dentin bonding as an array", J Dent Res, 78, pp.699~705 (1999)
- Shono Y, "Effect of cross sectional area on resin-enamel tensile bond strength", Dent Mater, 13, pp.290~296 (1997)
- O’Brien WJ, "Dental materials and their selection", Quintessence Int, pp.97~114 (1997)
- Kanca J 3, "Pulse-activation: Reducing resin based-composite contraction stresses at the enamel cavosurface margins", Am J Dent, 12, pp.107~112 (1999)
- Lim BS, "Reduction of polymerization contraction stress for dental composites by two-step light-activation", Dent Mater, 18, pp.436~444 (2002)
- Bouschlicher MR, "Effect of stepped light intensity on polymerization force and conversion in a photoactivated composite", J Dent Res, 12(1), pp.23~32 (2004)
- Santos AJS, "Step-cure polymerization: effect of initial light intensity on resin", dentin bond strength in Class I cavities, 2006, pp.31, 324~331
- Brackett WW, "Effect of plasma arc curing on the microleakage of Class V resin-based composite restorations", Am J Dent, 13(3), pp.121~122 (2000)
- Mehl A, "Physical properties and gap formation of light-cured composite with and without“ soft start-polymerization”", J Dent, 25, pp.321~330 (1997)
- Caughman WF, "Correlation of cytotoxicity, filler loading and curing time of dental composites", Biomaterials, 12, pp.737~740 (1991)