Restorative Dentistry and Endodontics

The Korean Academy of Conservative Dentistry (대한치과보존학회)
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EFFECT OF LIGHT INTENSITY ON THE POLYMERIZATION RATE OF COMPOSITE RESIN USING REAL-TIME MEASUREMENT OF VOLUMETRIC CHANCE

광조사 강도가 복합레진의 중합반응속도에 미치는 영향에 관한 실시간 체적측정법을 이용한 연구

  • La, Sung-Ho (Dept. of Conservative Dentistry, College of Dentistry, Seoul National Univ.) ;
  • Lee, In-Bog (Dept. of Conservative Dentistry, College of Dentistry, Seoul National Univ.) ;
  • Kim, Chang-Keun (Dept. of Chemical Engineering, Chung-Ang Univ.) ;
  • Cho, Byeong-Hoon (Dept. of Conservative Dentistry, College of Dentistry, Seoul National Univ.) ;
  • Lee, Kwang-Won (Dept. of Conservative Dentistry, College of Dentistry, Chonbuk National Univ.) ;
  • Son, Ho-Hyun (Dept. of Conservative Dentistry, College of Dentistry, Seoul National Univ.)
  • 라성호 (서울대학교 치과대학 치과보존학교실) ;
  • 이인복 (서울대학교 치과대학 치과보존학교실) ;
  • 김창근 (중앙대학교 공과대학 화학공학과) ;
  • 조병훈 (서울대학교 치과대학 치과보존학교실) ;
  • 이광원 (전북대학교 치과대학 치과보존학교실) ;
  • 손호현 (서울대학교 치과대학 치과보존학교실)
  • Published : 2002.03.01
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Abstract

Objectives : The aim of this study is to evaluate the effect of light intensity variation on the polymerization rate of composite resin using IB system (the experimental equipment designed by Dr. IB Lee) by which real-time volumetric change of composite can be measured. Methods : Three commercial composite resins [Z100(Z1), AeliteFil(AF), SureFil(SF)] were photopolymerized with Variable Intensity Polymerizer unit (Bisco, U.S.A.) under the variable light intensity (75/150/225/300/375/450mW$^2$) during 20 sec. Polymerization shrinkage of samples was detected continuously by IB system during 110 sec and the rate of polymerization shrinkage was obtained by its shrinkage data. Peak time(P.T.) showing the maximum rate of polymerization shrinkage was used to compare the polymerization rate. Results : Peak time decreased with increasing light intensity(p<0.05). Maximum rate of polymerization shrinkage increased with increasing light intensity(p<0.05). Statistical analysis revealed a significant positive correlation between peak time and inverse square root of the light intensity (AF:R=0.965, Zl:R=0.974, SF:R=0.927). Statistical analysis revealed a significant negative correlation between the maximum rate of polymerization shrinkage and peak time(AF:R=-0.933, Zl:R=-0.892, SF:R=-0.883), and a significant positive correlation between the maximum rate of polymerization shrinkage and square root of the light intensity (AF:R=0.988, Zl:R=0.974, SF:R=0.946). Discussion and Conclusions : The polymerization rate of composite resins used in this study was proportional to the square root of light intensity Maximum rate of polymerization shrinkage as well as peak time can be used to compare the polymerization rate. Real-time volume method using IB system can be a simple alternative method to obtain the polymerization rate of composite resins.

Keywords

References

  1. Feilzer AJ, de Gee AJ and Davidson CL : Curing contraction of composites and glass-ionomer cements, Journal of Prosthetic Dentistry 59:297-300,1988 https://doi.org/10.1016/0022-3913(88)90176-X
  2. Tobolsky AV, Leonard F and Roeser GP : Use of polymerizable ring compounds in constant volume polymerization, J. Polym. Sci. 3:604-606,1948 https://doi.org/10.1126/science.3.68.604
  3. Retief DH : Do adhesives prevent microleakage?, Int Dent J. 44(1):19-26,1994
  4. Davidson CL and de Gee AJ : Relaxation of polymerization contraction stresses by flow in dental composites, J Dent Res 63(2): 146-148, 1984 https://doi.org/10.1177/00220345840630021001
  5. Feilzer AJ, Dooren LH, de Gee AJ and Davidson CL : Influence of light intensity on polymerization shrinkage and integrity of restoration-cavity interface. Eur J Oral Sci 103:322-326,1995 https://doi.org/10.1111/j.1600-0722.1995.tb00033.x
  6. Feilzer AJ, de Gee AJ and Davidson CL : Quantitative determination of stress reduction by flow in composite restorations. Dental Materials 6: 167-171,1990 https://doi.org/10.1016/0109-5641(90)90023-8
  7. Mehl A, Hickel R and Kunzelmann KH : Physical properties and gap formation of light-cured composites with and without 'softstart-polymerization', J Dent 25(3-4):321-330.1997 https://doi.org/10.1016/S0300-5712(96)00044-9
  8. Kanca J and Suh BI : Pulse activation:reducing resinbased composite contraction stresses at the enamel cavosurface margins, Am J Dent 12(3):107-112, 1999
  9. Suh BI and Cripe CA : Light intensity and exposure time effect on light-cured composites. IADR Abst.#73:p.1-6,1998
  10. Antonucci JM and Toth EE : Extent of polymerization of dental resins by differential scanning calorimetry, J Dent Res 62(2):121-5,1983 https://doi.org/10.1177/00220345830620020701
  11. Ruyter IE and Gyorosi PP : An infrared spectroscopic study of sealants. Scand J Dent Res 84(6):396-400,1976
  12. Venhoven BAM. de Gee AJ and Davidson CL : Light initiation of dental resins : dynamics of the polymerization, Biomat 17:2313-2318,1996 https://doi.org/10.1016/S0142-9612(96)00074-9
  13. Odian G : Principles of polymerization. 3rd ed. John Wiley & Sons. Inc. p198-243, 286-290,1991
  14. Venhoven BAM, de Gee AJ and Davidson CL : polymerization contraction and conversion of light-curing BisGMA-based methacrylate resins. Biomaterials 14(11):871-875,1993 https://doi.org/10.1016/0142-9612(93)90010-Y
  15. Loshaek S and Fox TG : Cross-linked polymers. I. Factors influencing the efficiency of cross-linking in copolymers of methyl methacrylates and glycol dimethacrylates, J. Am. Chem. Soc. 75:3544-3550, 1953 https://doi.org/10.1021/ja01110a068
  16. Lee lB : A new method - Real time measurement of the initial dynamic volumetric shrinkage of composite resins during polymerization, The J of kor academy of conservative dentistry 26(2):134-140,2001
  17. Rueggeberg F and Tamareselvy K : Resin cure determination by polymerization shrinkage, Dent Mater 11(4):265-268,1995 https://doi.org/10.1016/0109-5641(95)80060-3
  18. Lee IB, Jung KH and Um CM : Thermal analysis of the dual cured resin cements according to curing condition, The J of kor academy of conservative dentistry 24(2):265-285,1999

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