Journal of the korean academy of Pediatric Dentistry (대한소아치과학회지)

Korean Academy of Pediatric Dentistry (대한소아치과학회)
권호 표지

POLYMERIZATION SHRINKAGE OF COMPOSITE RESIN USING DOUBLE CURING UNIT SYSTEM

Double curing unit system을 이용한 복합 레진의 광중합 수축에 관한 연구

  • Han, Mi-Ran (Dankook University, School of Dentistry, Department of Pediatric Dentistry) ;
  • Kim, Jong-Soo (Dankook University, School of Dentistry, Department of Pediatric Dentistry) ;
  • Yoo, Seung-Hoon (Dankook University, School of Dentistry, Department of Pediatric Dentistry)
  • 한미란 (단국대학교 치과대학 소아치과학교실) ;
  • 김종수 (단국대학교 치과대학 소아치과학교실) ;
  • 유승훈 (단국대학교 치과대학 소아치과학교실)
  • Published : 2009.05.30
Download PDF
⟨ Previous Next ⟩

Abstract

As a part of an effort to minimize the polymerization shrinkage which is considered to be a major cause of failed bonds to tooth, newly designed 'Double LED system' was tested in the present study. Analyses were performed on the pattern of micro-leakage and the changes of strain which have occurred during the polymerization process. The results can be summarized as follows: 1. In the strain change, dramatic increase was observed with initiation of polymerization which was followed by subsequent gradual decrease with elapse of time in both the single LED system and double LED system. 2. The single LED system were shown to develop and maintain the maximum stress more than double LED system(p<0.05). 3. Less micro-leakage was found in the double LED system than in the single LED system(p<0.05). From the above-mentioned results, the double LED system can be a very useful tool in a sense of reducing polymerization shrinkage when compared to the single LED system. However, practical problems such as size of curing unit and its application method with its light intensity should be solved before its clinical application.

본 연구는 복합 레진이 광원을 향해 수축이 일어난다는 점에 착안하여 중합 수축시 필연적으로 발생되는 치질과의 결합단절을 개선하고자 double light emitting diode(LED) system을 고안하였으며, 중합 수축 시 발생하는 스트레인의 변화를 기록하고 미세 누출의 양상을 관찰하여 비교 분석한 결과 다음과 같은 결론을 얻었다. 1. 스트레인의 변화를 살펴보면, single LED system과 double LED system에서 광중합 개시와 함께 급격히 증가하였다가 시간이 지남에 따라 서서히 감소하는 유사한 수축 응력 양상을 보였다. 2. 최대 응력의 발생과 유지는 double LED system보다 single LED system에서 더 높게 나타났다(p<0.05). 3. Double LED system이 single LED system보다 미세 누출이 더 낮게 나타났다(p<0.05). 이상의 결과를 종합해보면, single LED system에 비해 double LED system에서 중합 수축 응력이 크지 않고 미세 누출도 줄일 수 있어 임상에서 매우 유용한 장비로 사용될 수 있으리라 생각된다. 그러나 두 개의 광원이 구강내에서 원활하게 움직이기 위해서는 광원의 크기가 충분히 작아야 한다. 현재 개발된 LED는 광량이 충분하지 않아 시술 시간의 단축을 원하는 소아 환자의 접착 수복에서는 어려운 실정이다. 따라서 수복물의 완전한 중합과 중합 시간의 감소를 위해 더 높은 출력의 광원이 필요하고, 이는 LED광원의 발달에 기대해 볼 수 있으리라 사료된다.

Keywords

References

  1. Condon JR, Ferracane JL : Assessing the effect of composite formulation on polymerization stress. J Am Dent Assoc. 131 :497-503. 2000.
  2. Hilton TJ : Can modern restorative procedures and materials reliably seal cavities? In vitro investigations. Part 1. Am J Dent. 15:198-210, 2002.
  3. Sheth JJ, Fuller JL, Jensen ME : Cuspal deformation and fracture resistance of teeth with dentin adhesives and composites. J Prosthet Dent, 60:560-9, 1988.
  4. Deliperi S, Bardwell DN : An alternative method to reduce polymerization shrinkage in direct posterior composite restorations. J Am Dent Assoc, 133: 1387-98, 2002.
  5. Hansen EK : Visible light-cured composite resins polymerization contraction, contraction pattern and hygroscopic expansion. Scand J Dent Res, 90:329-35, 1982.
  6. de Gee AJ, Feilzer AJ, Davidson CL : True linear polymerization shrinkage of unfilled resins and composites determined with a linometer. Dent Mater, 9:11-4, 1993. https://doi.org/10.1016/0109-5641(93)90097-A
  7. Cook WD, Forrest M, Goodwin AA : A simple method for the measurement of polymerization shrinkage in dental composites. Dent Mater, 15:447-9, 1999. https://doi.org/10.1016/S0109-5641(99)00073-1
  8. Donly KJ, Dowell A, Anixiadas C, et al : Relationship among visible light source, composite resin polymerization shrinkage, and hygroscopic expansion. Quintessence Int, 21:883-6, 1990.
  9. Dauvillier BS, Aarnts MP, Feilzer AJ : Developments in shrinkage control of adhesive restoratives. J Esthet Dent, 12:291-9, 2000. https://doi.org/10.1111/j.1708-8240.2000.tb00238.x
  10. Davidson CL, de Gee AJ : Relaxation of polymerization contraction stresses by flow in dental composites. J Dent Res, 63:146-8, 1984. https://doi.org/10.1177/00220345840630021001
  11. Feilzer AJ, De Gee AJ, Davidson CL : Setting stress in composite resin in relation to configuration of the restoration. J Dent Res, 66:1636-9, 1987. https://doi.org/10.1177/00220345870660110601
  12. Kinomoto Y, Torii M, Takeshige F, et al. : Polymerization contraction stress of resin composite restorations in a model Class I cavity configuration using photo elastic analysis. J Esthet Dent, 12:309-19, 2000. https://doi.org/10.1111/j.1708-8240.2000.tb00240.x
  13. Davidson CL, Feilzer AJ : Polymerization shrinkage and polymerization shrinkage stress in polymer­based restoratives. J Dent, 25 :435-40, 1997. https://doi.org/10.1016/S0300-5712(96)00063-2
  14. Sakaguchi RL, Douglas WH : Strain gauge measurement of polymerization shrinkage. J Dent Res, 68:977(abstr. 885), 1989.
  15. Versluis A, Tantbirojn D, Douglas WH : Do dental composites always shrink toward the light? J Dent Res, 77:1435-45, 1998. https://doi.org/10.1177/00220345980770060801
  16. 김윤철, 김종수, 권순원 등 : 스트레인 게이지법을 이용한 복합레진과 컴포머의 중합수축 평가에 관한 연구. 대한소아치과학회지, 29:19-29, 2002.
  17. Ruyter IE, Oysaed H : Conversion in different depths of ultraviolet and visible light activated composite materials. Acta Odontol Scand, 40:179-92, 1982. https://doi.org/10.3109/00016358209012726
  18. Shintani H, Inoue T, Yamaki M : Analysis of camphorquinone in visible light-cured composite resins. Dent Mater, 1:124-6, 1985. https://doi.org/10.1016/S0109-5641(85)80002-6
  19. Kleverlaan CJ, Feilzer AJ : Polymerization shrink age and contraction stress of dental resin composites. Dent Mater, 21: 1150-7, 2005. https://doi.org/10.1016/j.dental.2005.02.004
  20. Versluis A Douglas WH, Cross M, et al. : Does an incremental filling technique reduce polymerization shrinkage stresses? J Dent Res, 75:871-8, 1996. https://doi.org/10.1177/00220345960750030301
  21. Bandyopadhyay S : A study of the volumetric setting shrinkage of some dental materials. J Biomed Mater Res, 16:135-44, 1982. https://doi.org/10.1002/jbm.820160206
  22. Bausch JR, de Lange K, Davidson CL, et al. : Clinical significance of polymerization shrinkage of composite resins. J Prosthet Dent, 48:59-67, 1982 https://doi.org/10.1016/0022-3913(82)90048-8
  23. Suliman AH, Boyer DB, Lakes RS : Polymerization shrinkage of composite resins: comparison with tooth deformation. J Prosthet Dent, 71:7-12, 1994. https://doi.org/10.1016/0022-3913(94)90247-X
  24. Feilzer AJ, de Gee AJ, Davidson CL : Relaxation of polymerization contraction shear stress by hygroscopic expansion. J Dent Res, 69:36-9, 1990. https://doi.org/10.1177/00220345900690010501
  25. Fleming GJ, Khan S, Afzal O, et al. : Investigation of polymerisation shrinkage strain, associated cuspal movement and microleakage of MOD cavities restored incrementally with resin-based composite using an LED light curing unit. J Dent, 35:97-103, 2007. https://doi.org/10.1016/j.jdent.2006.05.003
  26. Tolidis K, Nobecourt A, Randall RC : Effect of a resin-modified glass ionomer liner on volumetric polymerization shrinkage of various composites. Dent Mater, 14:417-23, 1998. https://doi.org/10.1016/S0300-5712(99)00016-0
  27. Labella R, Lambrechts P, Van Meerbeek B, et al. : Polymerization shrinkage and elasticity of flowable composites and filled adhesives. Dent Mater, 15:128-37, 1999. https://doi.org/10.1016/S0109-5641(99)00022-6
  28. Hofmann N, Denner W, Hugo B, et al. : The influence of plasma arc vs. halogen standard or soft-start irradiation on polymerization shrinkage kinetics of polymer matrix composites. J Dent, 31:383-93, 2003. https://doi.org/10.1016/S0300-5712(03)00089-7
  29. Knezevic A. Demoli N, Tarle Z, et al. : Measurement of linear polymerization contraction using digital laser interferometry. Oper Dent, 30:346-52, 2005.
  30. Fogleman EA, Kelly MT, Grubbs WT : Laser inter-ferometric method for measuring linear polymerization shrinkage in light cured dental restoratives. Dent Mater, 18:324-30, 2002. https://doi.org/10.1016/S0109-5641(01)00057-4
  31. Calheiros FC, Sadek FT, Braga RR, et al. : Polymerization contraction stress of low-shrinkage composites and its correlation with microleakage in class V restorations. J Dent, 32:407-12, 2004. https://doi.org/10.1016/j.jdent.2004.01.014
  32. Tani Y, Nambu T, Ishikawa A. et al. : Polymerization shrinkage and contraction force of composite resin restorative inserted with “Megafiller". Dent Mater J, 12:182-9, 1993. https://doi.org/10.4012/dmj.12.182
  33. Yap AU, Wang HB, Siow KS, et al. : Polymerization shrinkage of visible-light-cured composites. Oper Dent. 25:98-103, 2000.
  34. Sakaguchi RL, Sasik CT, Bunczak MA. et al. Strain gauge method for measuring polymerization contraction of composite restoratives. J Dent, 19:312-6, 1991 https://doi.org/10.1016/0300-5712(91)90081-9
  35. Sakaguchi RL, Peters MC, Nelson SR, et al. Effects of polymerization contraction in composite restorations. J Dent, 20: 178-82, 1992. https://doi.org/10.1016/0300-5712(92)90133-W
  36. Sakaguchi RL, Ferracane JL : Stress transfer from polymerization shrinkage of a chemical-cured com­po site bonded to a precast composite substrate. Dent Mater, 14:106-11. 1998. https://doi.org/10.1016/S0109-5641(98)00016-5
  37. 김영광, 김종수, 유승훈 : 스트레인 게이지를 이용한 수종의 복합레진의 중합수축 및 수축응력의 비교, 대한소아치과학회지, 31:516-26, 2004.
  38. Feilzer AJ, De Gee AJ, Davidson CL : Curing contraction of composites and glass-ionomer cements. J Prosthet Dent, 59:297-300, 1988. https://doi.org/10.1016/0022-3913(88)90176-X
  39. Rees JS, Jacobsen PH : Current status of composite material and adhesive systems. 5. Clinical techniques for direct placement. Restorative Dent, 6:4­7, 1990.
  40. Hegdahl T, Gjerdet NR : Contraction stresses of composite resin filling materials. Acta Odontol Scand, 35:191-5, 1977. https://doi.org/10.3109/00016357709004654
  41. Bowen RL, Nemoto K, Rapson JE : Adhesive bond ing of various materials to hard tooth tissues: forces developing in composite materials during hardening. J Am Dent Assoc, 106:475-7, 1983.
  42. Santos AJ, Sarmento CF, Abuabara A, et al. : Step cure polymerization: effect of initial light intensity on resin/dentin bond strength in class I cavities. Oper Dent, 31:324-31, 2006 https://doi.org/10.2341/05-37
  43. Alani AH, Toh CG Detection of microleakage around dental restorations: a review. Oper Dent, 22:173-85, 1997.
  44. Raskin A, D Hoore W, Gonthier S, et al. : Reliability of in vitro microleakage tests: a literature review. J Adhes Dent, 3:295-308, 2001.
  45. Scherer W, Kaim JM, Weiner E, et al. : Third gen eration dentin bonding agents: a microleakage study. J Esthet Dent, 2:33-5, 1990. https://doi.org/10.1111/j.1708-8240.1990.tb00603.x
  46. Seghi RR, Gritz MD, Kim J : Colorimetric changes in composites resulting from visible-light-initiated polymerization. Dent Mater, 6:133-7, 1990. https://doi.org/10.1016/S0109-5641(05)80044-2
  47. Caughman WF, Caughman GB, Shiflett RA et al. : Correlation of cytotoxicity, filler loading and curing time of dental composites. Biomaterials, 12:737-40, 1991. https://doi.org/10.1016/0142-9612(91)90022-3
  48. Maffezzoli A Della Pietra A Rengo S, et al. : Photopolymerization of dental composite matrices. Biomaterials. 15:1221-8, 1994. https://doi.org/10.1016/0142-9612(94)90273-9