광원에 따른 조사거리의 증가가 복합레진의 중합도에 미치는영향
Influence of tip distance on degree of conversion of composite resin in curing with various light sources
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초록
최근에 소개된 single high-intensity LED 중합기는 이전의 LED 중합기에 비해 높은 광도를 가지며 짧은 중합시간에 적절한 물성을 가질 수 있다고 한다. 본 연구는 single high-intensity LED 중합기의 중합성능을 평가하기 위하여 거리에 따른 중합도를 조사하였다. Mylar strip사이에 복합레진(Filtek Z250)을 넣고 압접시켜 만든 얇은 필름형 시편을 LED 중합기(Elipar Freelight 2, 10초), 플라스마 중합기(Flipo, 6초)와 할로겐 중합기(XL3000, 20초)를 사용해 0 mm, 2 mm, 4 mm, 6 mm에서 광도를 측정하고 중합시켰다. 중합된 시편을 Fourier Transform Infrared Spectrometer(FTIR)를 이용해 중합도를 측정한 후 다음과 같은 결론을 얻었다. 1. 모든 중합기에서 거리가 증가할수록 유의하게 광도가 감소하였으며 LED 중합기의 경우 6mm에서 다른 중합기에 비해 가장 많은 광도 감소율을 보였다(p<0.05). 2. 모든 중합기에서 거리가 증가함에 따라 4 mm까지는 중합도가 감소하였지만 유의한 차이는 보이지 않았다(p>0.05). 하지만 4 mm와 6 mm사이에서는 모든 중합기에서 유의하게 감소하였다(p<0.05). 3. 각 거리에 따른 중합기간의 중합도 차이는 0mm, 2 mm, 4 mm에서 LED 중합기가 다른 중합기보다 유의하게 높은 중합도를 보였으며(p<0.05) 플라스마 중합기와 할로겐 중합기 사이에서는 유의한 차이가 없었다. 하지만 6 mm에서는 모든 중합기 사이에 유의한 차이를 보이지 않았다(p>0.05).
Abstract
Recently, newly developed single high-intensity LED curing lights for composite resins are claimed to have a higher intensity than previous LED curing lights and to results in optimal properties and short curing time. The purpose of this study was to determine the curing effectiveness of the curing units and to evaluate the relationship between the degree of polymerization and distance from curing light tip end to resin surface. One composite resin was tested(Filtek Z250). Thin film specimens were cured with a LED curing unit(Elipar Freelight 2, 10s), Plasma Arc curing unit(Flipo, 6s), Halogen curing light(XL3000, 20s) at four curing light tip to the resin surface(0 mm, 2 mm, 4 mm, 6 mm). Degree of conversion of composite resins were determined by a Fourier Transform Infrared Spectrometer(FTIR). From the present study, the following results were obtained. 1. In all curing units, relative light intensity was significantly decreased according to the increase of distance of light tip to the resin surface(p<0.05). LED curing units showed a higher percentile decrease in intensity than other curing units. 2. In all curing units, degree of conversion was decreased as increase of the distance but no statistically significant difference(p>0.05) except between 4 mm and 6 mm(p<0.05). 3. When comparing degree of conversion of light curing units at each distance(0 mm, 2 mm, 4 mm, 6 mm), LED curing light had a higher degree of conversion than plasma arc and halogen curing lights at 0, 2, 4 mm(p<0.05). At 6 mm, there was a no significant difference among the curing units(p>0.05).
참고문헌 (30)
- "Light Curing-An Update", 23, pp.889~906 (2002)
- "Elipar Freelight 2 LED Curing light", pp.5~15 (2002)
- "A survey of the effectiveness of dental light curing units and a comparison of light testing device", 180, pp.411~416 (1996)
- "Characterization of resin composites polymerized with plasma arc curing unit", 16, pp.330~336 (2000)
- "New light curing options for composite resin restorations", 20, pp.122~135 (1999)
- "Optical power outputs, spectra and dental composite depths of cure, obtained with blue light emitting diode(LED) and halogen light curing units(LCUs)", 193, pp.459~463 (2002)
- "Polymerization efficiency of LED curing lights", 14, pp.287~295 (2002)
- "Hardness evaluation of a dental composite polymerized with experimental LED-based devices", 17, pp.309~315 (2001)
- "Fourier Transform Infrared Analysis of degree of polymerization in unfilled resins-methods comparison", 63, pp.1093~1095 (1984)
- "광에너지 총량에 따른 광중합 콤포짓레진과 콤포머의 중합도에 관한 연구", 27, pp.357~373 (2000)
- "Remaining methacrylate groups in composite restorative materials", 36, pp.75~82 (1977)
- "A comparison of four modes of evaluating depth of cure of light-activated composites", pp.727~730 (1987)
- "The micro-roman spectroscopy,a useful tool to determine the degree of conversion of light-activated composite resins", 48, pp.675~681 (1999)
- "Factors affecting cure of visible light activated composites", 35, pp.218~225 (1985)
- "Effect of light intensity and exposure duration on cure of resin composite", 19, pp.26~32 (1994)
- "Cure of resin based restorative materials", pp.307~311 (1983)
- "Skimmer's science of dental materials" (1982)
- "Effect of light-tip distance on polymerization of resin composite", 6, pp.364~370 (1993)
- "Decrease in power output of new light emitting diode(LED)curing devices with increasing distance to filling surface", 4, pp.107~204 (2002)
- "콤포짓트 레진의 중합체계에 따른 중합율 및 잔류 단량체 유출", 28, pp.169~178 (2001)
- "Effect of plasma arc curing on the microleakage of class V resin-based composite restorations", 13, pp.121~122 (2000)
- "Comparison between a plasma arc light source and conventional halogen curing units regarding flexural strength, modulus, and hardness of photoactivated resin composites", 4, pp.140~147 (2000)
- "Correlation of parameters used to estimate monomer in a light cured composite", 67, pp.932~937 (1988)
- "Composite conversion and temperature rise using a conventional,plasma arc,and an experimental blue LED curing unit", 29, pp.662~667 (2002)
- "Effect of backing reflectance and mold size on polymerization of photo-activated composite resin", 63, pp.1245~1247 (1984)
- "Curing dental resins and composites by photopolymerization", 12, pp.300~308 (2000)
- "Depth of cure and compressive strength of dental composites cured with blue light emitting diodes(LEDs)", 16, pp.41~47 (2000)
- "Effect of light wavelength on polymerization of light cured resins", 16, pp.60~73 (1997)
- "Influence of curing tip distance on resin composite Knoop hardness number,using three different light curing units", 28, pp.315~320 (2003)
- "광중합 복합레진의 중합시간과 거리에 따른 중합도의 변화", 28, pp.293~230 (2001)