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복합레진의 간헐적 광중합 방법이 중합 수축 속도와 치아의 교두 변위에 미치는 영향

Effect of intermittent polymerization on the rate of polymerization shrinkage and cuspal deflection in composite resin

김민경|박성호|서덕규|송윤정|이윤|이찬영
대한치과보존학회 (Korean Academy Of Conservative Dentistry)|2008.07|Restorative Dentistry and Endodontics|제33권 제4호|pp. 341-351

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참고문헌

키워드

Composite resin복합 레진Intermittent polymerizationRate of polymerization shrinkageCuspal deflection간헐적 광중합중합 수축 속도교두 변위
주제분류치의학

초록

This study investigated the effect of intermittent polymerization on the rate of polymerization shrinkage and cuspal deflection in composite resins. The linear polymerization shrinkage of each composite was measured using the custom-made linometer along with the light shutter specially devised to block the light at the previously determined interval. Samples were divided into 4 groups by light curing method; Group 1) continuous light (60s with light on); Group 2) intermittent light (cycles of 3s with 2s light on & 1s with light off for 90s); Group 3) intermittent light (cycles of 2s with 1s light on & 1s with light off for 120s); Group 4) intermittent light (cycles of 3s with 1s light on & 2s with light off for 180s). The amount of linear polymerization shrinkage was measured and its maximum rate (Rmax) and peak time (PT) in the first 15 seconds were calculated. For the measurement of cuspal deflection of teeth, MOD cavities were prepared in 10 extracted maxillary premolars. Reduction in the intercuspal distance was measured by the custom-made cuspal deflection measuring machine. ANOVA analysis was used for the comparison of the light curing groups and t-test was used to determine significant difference between the composite resins. Pyramid showed the greater amount of polymerization shrinkage than Heliomolar (p < 0.05). There was no significant difference in the linear polymerization shrinkage among the groups. The Rmax was group 4 < 3, 2 < 1 in Heliomolar and group 3 < 4 < 2, 1 in Pyramid (p < 0.05). Pyramid demonstrated greater cuspal deflection than Heliomolar. The cuspal deflection in Heliomolar was group 4 < 3 < 2, 1 and group 4, 3 < 2, 1 in Pyramid (p < 0.05). It was concluded that the reduced rate of polymerization shrinkage by intermittent polymerization can help to decrease the cuspal deflection.

Abstract

This study investigated the effect of intermittent polymerization on the rate of polymerization shrinkage and cuspal deflection in composite resins. The linear polymerization shrinkage of each composite was measured using the custom-made linometer along with the light shutter specially devised to block the light at the previously determined interval. Samples were divided into 4 groups by light curing method; Group 1) continuous light (60s with light on); Group 2) intermittent light (cycles of 3s with 2s light on & 1s with light off for 90s); Group 3) intermittent light (cycles of 2s with 1s light on & 1s with light off for 120s); Group 4) intermittent light (cycles of 3s with 1s light on & 2s with light off for 180s). The amount of linear polymerization shrinkage was measured and its maximum rate (Rmax) and peak time (PT) in the first 15 seconds were calculated. For the measurement of cuspal deflection of teeth, MOD cavities were prepared in 10 extracted maxillary premolars. Reduction in the intercuspal distance was measured by the custom-made cuspal deflection measuring machine. ANOVA analysis was used for the comparison of the light curing groups and t-test was used to determine significant difference between the composite resins. Pyramid showed the greater amount of polymerization shrinkage than Heliomolar (p < 0.05). There was no significant difference in the linear polymerization shrinkage among the groups. The Rmax was group 4 < 3, 2 < 1 in Heliomolar and group 3 < 4 < 2, 1 in Pyramid (p < 0.05). Pyramid demonstrated greater cuspal deflection than Heliomolar. The cuspal deflection in Heliomolar was group 4 < 3 < 2, 1 and group 4, 3 < 2, 1 in Pyramid (p < 0.05). It was concluded that the reduced rate of polymerization shrinkage by intermittent polymerization can help to decrease the cuspal deflection.

참고문헌 (40)

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관련 논문AI추천

Correlation between Linear polymerization shrinkage & tooth cuspal deflection박성호, 이순영대한치과보존학회 · Restorative Dentistry and Endodontics2005 · 제30권 제6호광중합형 구치부 수복재료의 중합 수축력과 교두 변위의 상관관계박성호, 이순영대한치과보존학회 · Restorative Dentistry and Endodontics2004 · 제29권 제4호5급 와동의 복합레진 수복 시 발생되는 교두굴곡에 관한 연구박준규, 이인복, 임범순대한치과보존학회 · Restorative Dentistry and Endodontics2008 · 제33권 제2호광조사 방법에 따른 복합레진의 중합수축에 관한 연구권순원, 권오진, 김종수대한소아치과학회 · 대한소아치과학회지2003 · 제30권 제1호Comparison of polymerization shrinkage of dual-cure core build-up resin according to shade and curing mode장훈상, 최유리나, Karl Lee치의학연구원 · Oral Biology Research2019 · 제43권 제4호광중합형 구치부 수복재료의 중합수축량과 중합수축력김수선, 김영주, 노병덕, 박성호, 이광성, 이봉희, 이순영, 이창재, 조용식대한치과보존학회 · Restorative Dentistry and Endodontics2003 · 제28권 제4호

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