Abstract
Objectives: The aim of this study was to investigate the effects of light curing method on the polymerization shrinkage of composite resins.
Materials and Methods: Eight methods of four different light curing units were tested by forming 16 groups using two different composite types. Resin composite specimens weights were determined with an analytical electronic hydrostatic balance in the air and in water before and after curing. Then specific gravity values were determined. Volumetric polymerization shrinkage was calculated using mathematical formulas.
Results: According to the results of this in-vitro study, polymerization shrinkage differed significantly among the light curing units.
Conclusions: When the amount of polymerization shrinkage was compared, it was determined that the curing method, which has the greatest total energy density, caused the greatest amount of shrinkage. It was also found out that some of the curing units affected the shrinkage positively in soft-start mode.
References
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- Bayne SC, Heymann HO, Swift EJ Jr. Update on dental composite restorations. J Am Dent Assoc 1994;125(6):687-701.
- Yap AU, Tan CH, Chung SM. Wear behavior of new composite restoratives. Oper Dent 2004;29(3):269-274.
- Yap AU, Lim LY, Yang TY, Ali A, Chung SM. Influence of dietary solvents on strength of nanofill and Ormocer composites. Oper Dent 2005;30(1):129-133.
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- Peutzfeldt A. Resin composites in dentistry: The monomer systems. Eur J Oral Sci 1997;105(2):97-116. [CrossRef]
- Sakaguchi RL, Berge HX. Reduced light energy density decreases postgel contraction while maintaining the degree of conversion in composites. J Dent 1998;26(8):695-700. [CrossRef] 8. Craig RG, Powers JM. Restorative dental materials. 2002; Mosby, St. Louis.
- Nomoto R, Uchida K, Hirasawa T. Effect of light intensity on polymerization of light cured composite resins. Dent Mater J 1994;13(2):198-205.
- Soh MS, Yap AUJ. Influence of curing modes on crosslink density in polymer structures. J Dent 2004;32(4):321-326. [CrossRef]
- Mehl A, Hickel R, Kunzelmann KH. Physical properties and gap formation of light-cured composites with and without “soft-start polymerization” J Dent 1997;25(34):321- 330.
- Kanca J, Suh BI. Pulse activation: Reducing resin-based composite contraction at the enamel cavosurface margins. Am J Dent 1999;12(3):107-112.
- Friedl KH, Schmaltz G, Hiller KA , Markl A. Marginal adaptation of Class V restorations with and without “softstart” polymerization. Oper Dent 2000;25(1):26-32.
- Oberholzer TG, Pameijer CH, Grobler SR, Rossouw RJ. The effect of different power densities and method of exposure on the marginal adaptation of four light-cured dental restorative materials. Biomater 2003;24(20):3593-3598. [CrossRef]
- Yap AUJ, Soh MS, Han VTS, Siow KS. Influence of curing lights and modes on cross-link density of dental composites. Oper Dent 2004;29(4):410-415.
- Puckett AD, Smith R. Method to measure the polymerization shrinkage of light-cured composites. J Prosthet Dent 1992;68(1):56-58. [CrossRef]
- Ilie N, Kunzelmann KH, Hickel R. Evaluation of micro-tensile bond strengths of composite materials in comparison to their polymerization shrinkage. Dent Mater 2006;22(7):593-601. [CrossRef]
- Watts DC, Cash AJ. Determination of polymerization shrinkage kinetics in visible-light-cured materials: methods development. Dent Mater 1991;7(4):281-287. [CrossRef]
- Coelho Santos MJ, Santos GC JR, Nagem Filho H, Mondelli RF, ElMowafy O. Effect of light curing method on volumetric polymerization shrinkage of resin composites. Oper Dent 2004;29(2):157-161.
- Miyazaki M, Fukuishi K, Onose H. Influence of light irradiation on the volumetric change of polyacidmodified resin composites. J Dent 1999;27(2):149-153. [CrossRef]
- Baek CJ, Hyun SH, Lee SK, Seol HJ, Kim HI, Kwon YH. The effects of light intensity and light-curing time on the degree of polymerization of dental composite resins. Dent Mater J 2008;27(4):523-533. [CrossRef]
- Obici AC, Sinhoreti MA, De Goes MF, Consani S, Sobrinho LC. Effect of the photo-activation method on polymerization shrinkage of restorative composites. Oper Dent 2002;27(2):192-198.
- Alonso RC, Cunha LG, Correr GM, De Goes MF, Correr-Sobrinho L, Puppin-Rontani RM, Sinhoreti MAC. Association of photoactivation methods and low modulus liners on marginal adaptation of composite restorations. Acta Odontol Scand 2004;62(6):298304. [CrossRef]
- Dennison JB, Yaman P, Seir R, Hamilton JC. Effect of variable light intensity on composite shrinkage. J Prosthet Dent 2000;84(5):499-505. [CrossRef]
- Obici AC, Sinhoreti MA, De Goes MF, Consani S, Sobrinho LC. Effect of the photo-activation method on polymerization shrinkage of restorative composites. Oper Dent 2002;27(2):192-198.
- Yap AU, Ng SC, Siow KS. Soft-start polymerization: influence on effectiveness of cure and post-gel shrinkage. Oper Dent 2001;26(3):260-266.
- Koran P, Kurschner R. Effect of sequential versus continuous irradiation of a light-cured resin composite on shrinkage, viscosity, adhesion, and degree of polymerization. Am J Dent 1998;11(1):17-22.
Abstract
References
- Tolidis K, Nobecourt A, Randall R. Effect of a resin-modified glass ionomer liner on volumetric polymerization shrinkage of various composites. Dent Mater 1998;14(6):417-423. [CrossRef]
- Bayne SC, Heymann HO, Swift EJ Jr. Update on dental composite restorations. J Am Dent Assoc 1994;125(6):687-701.
- Yap AU, Tan CH, Chung SM. Wear behavior of new composite restoratives. Oper Dent 2004;29(3):269-274.
- Yap AU, Lim LY, Yang TY, Ali A, Chung SM. Influence of dietary solvents on strength of nanofill and Ormocer composites. Oper Dent 2005;30(1):129-133.
- Braga RR, Ferracane JL. Alternatives in polymerization contraction stress management. Crit Rev Oral Biol Med 2004;15(3):176184. [CrossRef]
- Peutzfeldt A. Resin composites in dentistry: The monomer systems. Eur J Oral Sci 1997;105(2):97-116. [CrossRef]
- Sakaguchi RL, Berge HX. Reduced light energy density decreases postgel contraction while maintaining the degree of conversion in composites. J Dent 1998;26(8):695-700. [CrossRef] 8. Craig RG, Powers JM. Restorative dental materials. 2002; Mosby, St. Louis.
- Nomoto R, Uchida K, Hirasawa T. Effect of light intensity on polymerization of light cured composite resins. Dent Mater J 1994;13(2):198-205.
- Soh MS, Yap AUJ. Influence of curing modes on crosslink density in polymer structures. J Dent 2004;32(4):321-326. [CrossRef]
- Mehl A, Hickel R, Kunzelmann KH. Physical properties and gap formation of light-cured composites with and without “soft-start polymerization” J Dent 1997;25(34):321- 330.
- Kanca J, Suh BI. Pulse activation: Reducing resin-based composite contraction at the enamel cavosurface margins. Am J Dent 1999;12(3):107-112.
- Friedl KH, Schmaltz G, Hiller KA , Markl A. Marginal adaptation of Class V restorations with and without “softstart” polymerization. Oper Dent 2000;25(1):26-32.
- Oberholzer TG, Pameijer CH, Grobler SR, Rossouw RJ. The effect of different power densities and method of exposure on the marginal adaptation of four light-cured dental restorative materials. Biomater 2003;24(20):3593-3598. [CrossRef]
- Yap AUJ, Soh MS, Han VTS, Siow KS. Influence of curing lights and modes on cross-link density of dental composites. Oper Dent 2004;29(4):410-415.
- Puckett AD, Smith R. Method to measure the polymerization shrinkage of light-cured composites. J Prosthet Dent 1992;68(1):56-58. [CrossRef]
- Ilie N, Kunzelmann KH, Hickel R. Evaluation of micro-tensile bond strengths of composite materials in comparison to their polymerization shrinkage. Dent Mater 2006;22(7):593-601. [CrossRef]
- Watts DC, Cash AJ. Determination of polymerization shrinkage kinetics in visible-light-cured materials: methods development. Dent Mater 1991;7(4):281-287. [CrossRef]
- Coelho Santos MJ, Santos GC JR, Nagem Filho H, Mondelli RF, ElMowafy O. Effect of light curing method on volumetric polymerization shrinkage of resin composites. Oper Dent 2004;29(2):157-161.
- Miyazaki M, Fukuishi K, Onose H. Influence of light irradiation on the volumetric change of polyacidmodified resin composites. J Dent 1999;27(2):149-153. [CrossRef]
- Baek CJ, Hyun SH, Lee SK, Seol HJ, Kim HI, Kwon YH. The effects of light intensity and light-curing time on the degree of polymerization of dental composite resins. Dent Mater J 2008;27(4):523-533. [CrossRef]
- Obici AC, Sinhoreti MA, De Goes MF, Consani S, Sobrinho LC. Effect of the photo-activation method on polymerization shrinkage of restorative composites. Oper Dent 2002;27(2):192-198.
- Alonso RC, Cunha LG, Correr GM, De Goes MF, Correr-Sobrinho L, Puppin-Rontani RM, Sinhoreti MAC. Association of photoactivation methods and low modulus liners on marginal adaptation of composite restorations. Acta Odontol Scand 2004;62(6):298304. [CrossRef]
- Dennison JB, Yaman P, Seir R, Hamilton JC. Effect of variable light intensity on composite shrinkage. J Prosthet Dent 2000;84(5):499-505. [CrossRef]
- Obici AC, Sinhoreti MA, De Goes MF, Consani S, Sobrinho LC. Effect of the photo-activation method on polymerization shrinkage of restorative composites. Oper Dent 2002;27(2):192-198.
- Yap AU, Ng SC, Siow KS. Soft-start polymerization: influence on effectiveness of cure and post-gel shrinkage. Oper Dent 2001;26(3):260-266.
- Koran P, Kurschner R. Effect of sequential versus continuous irradiation of a light-cured resin composite on shrinkage, viscosity, adhesion, and degree of polymerization. Am J Dent 1998;11(1):17-22.
Details
| Primary Language | English |
|---|---|
| Journal Section | Original Research Articles |
| Authors | |
| Publication Date | January 3, 2012 |
| Submission Date | March 24, 2011 |
| Published in Issue | Year 2012 |
Cumhuriyet Dental Journal (Cumhuriyet Dent J, CDJ) is the official publication of Cumhuriyet University Faculty of Dentistry. CDJ is an international journal dedicated to the latest advancement of dentistry. The aim of this journal is to provide a platform for scientists and academicians all over the world to promote, share, and discuss various new issues and developments in different areas of dentistry. First issue of the Journal of Cumhuriyet University Faculty of Dentistry was published in 1998. In 2010, journal's name was changed as Cumhuriyet Dental Journal. Journal’s publication language is English.
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