즉시 광중합과 지연 광중합이 이원 중합 레진시멘트의 중합 수축량에 미치는 영향
Effects of immediate and delayed light activation on the polymerization shrinkage-strain of dual-cure resin cements
1
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
본 연구에서는 세 가지 중합 방법에 따른 이원 중합 레진 시멘트의 중합 수축률을 비교하고 광조사가 중합 정도에 미치는 영향에 관하여 알아보고자 하였다. 재료 및 방법: 네 가지 종류의 이원 중합형 레진 시멘트(Smartcem 2, Panavia F 2.0, Clearfil SA Luting, Zirconite)가 사용되었다. 각 재료 당 세가지 서로 다른 중합 방법(자가 중합, 즉시 광중합, 5분 지연 광중합)으로 중합하였으며, 각 방법 당 5개의 시편을 사용하였다. Bonded disk method를 사용하여 37℃에서 30분간, 시간에 따른 중합 수축률을 측정하였다. 측정값은 일원분산분석과 다중 분석을 위한 Scheffe′test를 사용하였고, 유의수준은 0.05으로 하였다. 결과: Panavia F 2.0를 제외한 나머지 세 종류의 이원 중합 레진 시멘트들은 지연 광중합 반응에서 가장 높은 중합 수축률을 보였다. Panavia F 2.0의 중합 수축률은 중합 방법간에 통계학적 유의성이 없었다. 중합이 개시된 초기 10분 내에 즉시 혹은 지연 광중합에서 모든 시멘트는 90% 이상의 중합 수축을 보였다. 결론: 이원 중합 레진 시멘트의 지연 광중합이 중합 효율을 높인다.
Abstract
This study was designed to compare the amount of polymerization shrinkage of dual-cure resin cements according to different polymerization modes and to determine the effect of light activation on the degree of polymerization. Materials and methods: Four kinds of dual-cure resin cements were investigated: Smartcem 2, Panavia F 2.0, Clearfil SA Luting and Zirconite. Each material was tested in three different polymerization modes: self-polymerization only, immediate light polymerization and 5minutes-delayed light polymerization. The time-dependent polymerization shrinkage-strain was evaluated for 30 minutes by Bonded-disk method at 37℃. Five recordings of each material with three different modes were taken. Data were analyzed using one-way ANOVA and multiple comparison Scheffe′test (α=.05). Results: All materials, except Panavia F 2.0, exhibited the highest polymerization shrinkage-strain through delayed light-activated polymerization. No significant difference between light activation modes was found with Panavia F 2.0. All materials exhibited more than 90% of polymerization rate in the immediate or delayed light activated group within 10 minutes. Conclusion: As a clinical implication of this study, the application of delayed light activation mode to dual-cure resin cements is advantageous in terms of degree of polymerization.
참고문헌 (23)
- Venhoven BA, "Light initiation of dental resins: dynamics of the polymerization", Biomaterials, 17, pp.2313~2318 (1996)
- Braga RR, "Contraction stress related to degree of conversion and reaction kinetics", J Dent Res, 81, pp.114~118 (2002)
- Lu H, "Towards the elucidation of shrinkage stress development and relaxation in dental composites", Dent Mater, 20, pp.979~986 (2004)
- Calheiros FC, "Influence of irradiant energy on degree of conversion, polymerization rate and shrinkage stress in an experimental resin composite system", Dent Mater, 24, pp.1164~1168 (2008)
- Hansel C, "Effects of various resin composite (co)monomers and extracts on two caries-associated micro-organisms in vitro", J Dent Res, 77, pp.60~67 (1998)
- Arikawa H, "Bending strength and depth of cure of light-cured composite resins irradiated using filters that simulate enamel", J Oral Rehabil, 31, pp.74~80 (2004)
- Di Francescantonio M, "Influence of viscosity and curing mode on degree of conversion of dual-cured resin cements", Eur J Dent, 7, pp.81~85 (2013)
- de Menezes MJ, "Influence of lightactivated and auto- and dual-polymerizing adhesive systems on bond strength of indirect composite resin to dentin", J Prosthet Dent, 96, pp.115~121 (2006)
- Arrais CA, "Microtensile bond strength of dual-polymerizing cementing systems to dentin using different polymerizing modes", J Prosthet Dent, 97, pp.99~106 (2007)
- Pegoraro TA, "Cements for use in esthetic dentistry", Dent Clin North Am, 51, pp.453~471 (2007)
- Atlas AM, "Effect of delayed light polymerization of a dual-cured composite base on microleakage of Class 2 posterior composite open-sandwich restorations", Quintessence Int, 40, pp.471~477 (2009)
- Moraes RR, "Impact of immediate and delayed light activation on self-polymerization of dual-cured dental resin luting agents", Acta Biomater, 5, pp.2095~2100 (2009)
- Watts DC, "Determination of polymerization shrinkage kinetics in visible-light-cured materials: methods development", Dent Mater, 7, pp.281~287 (1991)
- Watts DC, "Optimal specimen geometry in bondeddisk shrinkage-strain measurements on light-cured biomaterials", Dent Mater, 16, pp.447~451 (2000)
- Kim SH, "Polymerization shrinkage-strain kinetics of temporary crown and bridge materials", Dent Mater, 20, pp.88~95 (2004), 20
- Spinell T, "Polymerization shrinkage kinetics of dimethacrylate resin-cements", Dent Mater, 25, pp.1058~1066 (2009)
- Moraes RR, "Light- and time-dependent polymerization of dual-cured resin luting agent beneath ceramic", Acta Odontol Scand, 66, pp.257~261 (2008)
- Kim JW, "Effect of curing method and curing time on the microhardness and wear of pit and fissure sealants", Dent Mater, 18, pp.120~127 (2002)
- el-Mowafy OM, "Hardening of new resin cements cured through a ceramic inlay", Oper Dent, 24, pp.38~44 (1999)
- Braga RR, "Mechanical properties of resin cements with different activation modes", J Oral Rehabil, 29, pp.257~262 (2002)
- Blackman R, "Influence of ceramic thickness on the polymerization of light-cured resin cement", J Prosthet Dent, 63, pp.295~300 (1990)
- Arrais CA, "Effect of curing mode on the polymerization characteristics of dual-cured resin cement systems", J Dent, 36, pp.418~426 (2008)
- Rueggeberg FA, "The influence of light exposure on polymerization of dual-cure resin cements", Oper Dent, 18, pp.48~55 (1993)