Light polymerization during cavity filling: influence of total energy density on shrinkage and marginal adaptation

详细信息    查看全文

• 作者：Tissiana Bortolotto (1)
  Federico Prando (1)
  Didier Dietschi (1)
  Ivo Krejci (1)
  
• 关键词：Curing protocol ; Radiant exposure ; Linear shrinkage ; Polymerization force ; Marginal integrity
• 刊名：Odontology
• 出版年：2014
• 出版时间：July 2014
• 年：2014
• 卷：102
• 期：2
• 页码：184-188
• 全文大小：162 KB
• 参考文献：1. Koplin C, Jaeger R, Hahn P. A material model for internal stress of dental composites caused by the curing process. Dent Mater. 2009;25:331-. CrossRef
  2. Ferracane JL, Mitchem JC. Relationship between composite contraction stress and leakage in class V cavities. Am J Dent. 2003;16:239-3.
  3. Sakaguchi RL, Wiltbank BD, Murchison CF. Contraction force rate of polymer composites is linearly correlated with irradiance. Dent Mater. 2004;20:402-. CrossRef
  4. Dewaele M, Asmussen E, Devaux J, et al. Class II restorations: influence of a liner with rubbery qualities on the occurrence and size of cervical gaps. Eur J Oral Sci. 2006;114:535-1. CrossRef
  5. Cadenaro M, Biasotto M, Scuor N, et al. Assessment of polymerization contraction stress of three composite resins. Dent Mater. 2008;24:681-. CrossRef
  6. Cadenaro M, Marchesi G, Antoniolli F, et al. Flowability of composites is no guarantee for contraction stress reduction. Dent Mater. 2009;25:649-4. CrossRef
  7. Rueggeberg FA, Caughman WF, Curtis JW Jr. Effect of light intensity and exposure duration on cure of resin composite. Oper Dent. 1994;19:26-2.
  8. Halvorson RH, Erickson RL, Davidson CL. Energy dependent polymerization of resin-based composite. Dent Mater. 2002;18:463-. CrossRef
  9. Yap AU, Seneviratne C. Influence of light energy density on effectiveness of composite cure. Oper Dent. 2001;26:460-.
  10. Ferracane JL, Berge HX. Fracture toughness of experimental dental composite aged in ethanol. J Dent Res. 1995;74:1418-3. CrossRef
  11. Emami N, S?derholm K-JM. How light irradiance and curing time affect monomer conversion in light-cured resin composites. Eur J Oral Sci. 2003;111:536-2. CrossRef
  12. Sakaguchi RL, Ferracane JL. Effect of light power density on development of elastic modulus of a model light-activated composite during polymerization. J Esthet Restor Dent. 2001;13:121-0. CrossRef
  13. Asmussen E, Peutzfeldt A. Resin composite properties and energy density of light cure. J Dent Res. 2005;84:659-2. CrossRef
  14. Dietschi D. Evaluation of marginal and internal adaptation of adhesive class II restorations. In vitro fatigue tests. PhD thesis, University of Geneva, Switzerland (2003).
  15. Stavridakis MM, Lutz F, Johnston WM, et al. Linear displacement and force induced by polymerization shrinkage of resin-based restorative materials. Am J Dent. 2003;16:431-.
  16. De Gee AF, Feilzer AJ, Davidson CL. True linear polymerization shrinkage of unfilled resins and composites determined with a linometer. Dent Mater. 1993;9:11-. CrossRef
  17. Asmussen E, Peutzfeldt A. Polymerization contraction of resin composite vs. energy and power density of light-cure. Eur J Oral Sci. 2005;113:417-1. CrossRef
  18. Feng L, Carvalho R, Suh BI. Insufficient cure under the condition of light irradiance and short irradiation time. Dent Mater. 2009;25:283-. CrossRef
  19. Lovell LG, Lu H, Elliott JE, et al. The effect of cure rate on the mechanical properties of dental resins. Dent Mater. 2001;17:504-1. CrossRef
  20. Lovell LG, Berchtold KA, Elliott JE, et al. Understanding the kinetics and network formation of dimethacrylate dental resins. Polym Adv Tech. 2001;12:335-5.
  21. Vandewalle KS, Ferracane JL, Hilton TJ, et al. Effect of energy density on properties and marginal integrity of posterior resin composite restorations. Dent Mater. 2004;20:96-06. CrossRef
  22. Pfeifer CS, Ferracane JL, Sakaguchi RL, et al. Factors affecting photopolymerization stress in dental composites. J Dent Res. 2008;87:1043-. CrossRef
  
• 作者单位：Tissiana Bortolotto (1)
  Federico Prando (1)
  Didier Dietschi (1)
  Ivo Krejci (1)
  
  1. Division of Cariology and Endodontics, School of Dental Medicine, University of Geneva, 19 Rue Barthelemy Menn, 1205, Geneva, Switzerland
  
• ISSN：1618-1255

文摘

The aim of the study was to evaluate the marginal adaptation and shrinkage stress development of a micro hybrid restorative composite as a function of energy density. Linear displacement and shrinkage forces were measured with custom-made devices for energies of 4,000, 8,000, 16,000 and 32,000?mJ/cm2 at a constant power density of 800?mW/cm2. Marginal adaptation of composite restorations cured with the same energy density was evaluated before and after mechanical loading with 300,000 cycles at 70?N. The group -,000?mJ/cm2-showed the lowest shrinkage force [2.9(0.2)?kg] and linear displacement [23.5(0.7)?μm] but led to the worst marginal adaptation after loading [46.4(23.5)?%CM] probably due to under-curing. When the maximum energy of 32,000?mJ/cm2 was applied, a slight increase in shrinkage forces [3.6(0.2)?kg and 29.2(0.8)?μm], and a slight decrease in marginal adaptation after loading [75.4(11.5)?%CM] were observed, but these changes were not significantly different in comparison to groups cured with energies of 8,000 and 16,000?mJ/cm2. For the resin composite tested in this study, no differences in marginal adaptation could be detected above the energy threshold of 8,000?mJ/cm2.