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연마 방법에 따른 3D 프린팅 레진의 색조 안정성과 표면 조도 의 비교

Comparison of Color Stability and Surface Roughness of 3D Printing Resin by Polishing Methods

김유진|김종수|김종빈|신지선|이준행|한미란|김희주
대한소아치과학회 (The Korean Academy Of Pediatric Dentistry)|2023.05|대한소아치과학회지 (Journal of the Korean academy of pediatric dentistry)|제50권 제2호|pp. 205-216

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참고문헌

키워드

3D printingSurface roughnessColor stabilityResinPolishing method
주제분류치의학

초록

이 연구의 목적은 3D 프린팅 레진의 연마 방법에 따른 색조 안정성과 표면 조도를 시간에 따라 비교하는 것이다. 3D 프린터와 TC-80DP 레진을 이용하여 3D 프린팅 레진 시편을제작하였고, 각 시편은 연마하지 않은 군, Enhance®군, Sof-LexTM군으로 분류되었다. 각군은 연마 직후 기준점을 측정하고, 다시 인공 타액과 오렌지 주스에 나누어 침전시킨 뒤, 침전 1, 7, 30, 60일에 CIE L*a*b* 값의 색차(ΔE*)와 각 시점의 표면 조도가 측정되었다. 연구 결과, 60일 침전 후 인공 타액에서는 육안으로 확인 가능한 정도의 색조 변화는 일어나지 않았으나 오렌지 주스에서는 육안으로 확인 가능한 색조 변화가 나타났고, 용액에 따른 차이는 유의미했다. 표면 조도는 Sof-LexTM군에서만 오렌지 주스가 인공 타액보다 유의하게 높았다. 연마 방법에 따른 색조 변화의 차이는 없었으나 표면 조도는 Sof-LexTM군이 연마하지 않은 군과 Enhance®군보다 유의하게 낮았으며, 모든 군에서 치태 침착 임계 조도보다는 높았지만, 임상적으로 허용 가능한 정도였다. 이번 연구 결과, 유전치 전장관 수복을 위해 영구 수복용 3D 프린팅 레진 사용 시 착색제 섭취에 유의해야 하며, Sof- LexTM를 이용하여 연마하는 것이 권장된다.

Abstract

This study aimed to compare the color stability and surface roughness of three-dimensional (3D) printing resin according to polishing methods. 3D-printed resin specimens were fabricated at TC-80DP (Graphy, Seoul, Korea) with a stereolithography 3D printer, and the specimens were divided into three groups, each of which was not polished, was polished using Enhance®, and was polished using a Sof-LexTM disc. The CIE L*a*b* value and the surface roughness of each group were measured and immersed in artificial saliva and orange juice after 0, 1, 7, 30, and 60 days, and the color difference (ΔE*) was calculated. As a result of the study, no noticeable color change was observed in artificial saliva, but a noticeable color change was demonstrated in orange juice after 60 days of immersion, and the difference was significant. In the Sof-LexTM group, surface roughness according to the solution was found to be significantly higher in the orange juice than that in artificial saliva. No significant difference in color change was found according to the polishing method, but surface roughness was significantly lower in the Sof-LexTM group than both that of the unpolished group and that of the Enhance® group. Nevertheless, all groups exhibited clinically acceptable properties regardless of their higher surface roughness than the threshold for plaque accumulation. Overall, this study recommends utilizing Sof-LexTM for polishing 3D printing resin when used in primary anterior tooth coverage.

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