Journal of Dental Rehabilitation and Applied Science (구강회복응용과학지)

Korean Academy of Stomatognathic Function and Occlusion (대한턱관절교합학회)
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Color evaluation of low viscosity bulk-fill resin with composite resin capping layer

저점도 벌크필레진과 복합레진 적층수복물의 색조 평가

  • Yun, Jonghyeon (Department of Dental Science, School of Dentistry, Chonnam National University) ;
  • Jung, Ji-Hye (Department of Prosthodontics, College of Dentistry, Wonkwang University) ;
  • Chang, Hoon-Sang (Department of Conservative Dentistry, School of Dentistry, Chonnam National University)
  • 윤종현 (전남대학교 치의학전문대학원 치의학과) ;
  • 정지혜 (원광대학교 치과대학 치과보철학교실) ;
  • 장훈상 (전남대학교 치의학전문대학원 치과보존학교실)
  • Received : 2015.07.13
  • Accepted : 2015.12.05
  • Published : 2015.12.31
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Abstract

Purpose: The purpose of this study was to measure the color of low viscosity bulk-fill resin with a capping layer and to compare it with the color of microhybrid composite resin. Materials and Methods: A low viscosity bulk-fill resin (SDR) and microhybrid composite resin of shade A2 (A2) or A3 (A3) were fabricated to 4 mm thickness and light cured for 20 seconds. CIE $L^*a^*b^*$ values of the resin specimens were measured with a colorimeter. Then shade A2 and A3 microhybrid composite resin was capped over low viscosity bulk-fill resins in 2 mm thickness (SA2, SA3). The resin specimens were light cured for 20 seconds and the color was measured and analyzed (n = 10). Color differences (${\Delta}E$) between SA2 and A2, SA3 and A3 were also calculated. Results: $L^*$ value was highest in SDR followed by SA2 and SA3. $L^*$ value of A2 and A3 was the lowest. $a^*$ value was lowest in SDR followed by SA2 and SA3, and A2 and A3 was the highest. $b^*$ value was lowest in SDR followed by A2 and SA2, and A3 and SA3 was the highest. ${\Delta}E$ between A2 and SA2 (${\Delta}E=3.4$), and that between A3 and SA3 (${\Delta}E=3.1$) was lower than the perceptible color difference threshold of ${\Delta}E=3.7$. Conclusion: ${\Delta}E$ between low viscosity bulk-fill resin with a capping layer and microhybrid resin was lower than the perceptible color difference threshold.

목적: 저점도 벌크필레진과 복합레진을 적층한 수복물의 색조를 평가하기 위함이다. 연구 재료 및 방법: 저점도 벌크필레진(SDR)과 A2, A3 색조의 미세혼합형 복합레진(A2, A3)을 4 mm 두께로 제작하여 광중합한 후 색차계를 이용하여 레진 시편의 CIE $L^*a^*b^*$ 값을 측정하였다. 이후 저점도 벌크필레진 상방에 2 mm 두께로 A2, A3 색조의 미세혼합형 복합레진을 적층하여(SA2, SA3) 광중합한 후 색측정을 하고(n = 10), 저점도 벌크필레진과 미세혼합형 복합레진, 그리고 이들을 적층한 시편의 색차(${\Delta}E$)를 계산하였다. 결과: $L^*$ 값은 SDR이 가장 컸고 SA2, SA3 그리고 A2, A3 순으로 감소했다. $a^*$ 값은 SDR이 가장 작았고 SA2, SA3 그리고 A2, A3 순으로 증가했다. $b^*$ 값은 SDR이 가장 작았으며 A2, SA2 그리고 A3, SA3 순으로 증가했다. 적층한 시편과 미세복합형 복합레진 시편의 ${\Delta}E$ 값은 A2와 SA2 사이에 ${\Delta}E=3.4$, A3와 SA3 사이에 ${\Delta}E=3.1$로 계산되었다. 결론: 저점도 벌크필레진과 미세혼합형 복합레진을 적층한 시편과 미세혼합형 복합레진만으로 제작한 시편의 색조의 차이는 일반적으로 인지하지 못할 정도로 작았다.

Keywords

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