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분광분석법을 이용한 수종 MTA의 치관변색 평가

Spectrophotometric Analysis of Crown Discoloration Induced by Various MTA Based Materials

김재환|김선미|최남기|임유란
대한소아치과학회 (The Korean Academy Of Pediatric Dentistry)|2017.02|대한소아치과학회지 (Journal of the Korean academy of pediatric dentistry)|제44권 제1호|pp. 28-37

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참고문헌

키워드

Zirconium oxideSpectrophotometer방사선 불투과성Mineral trioxide aggregate치관 변색분광광도계MTA산화 비스무스산화 지르코늄Crown discolorationBismuth oxideRadiopacifier
주제분류치의학

초록

Mineral trioxide aggreagate는 치수 치료제로서 많이 사용되고 있는 재료중 하나이다. 그 중 가장 널리 쓰이고 있는Proroot white MTA􀋓는 치아 변색을 일으킨다는 단점이 있다. 이번 연구에서는 MTA 기반 재료들인 Proroot wMTA􀋓, Biodentine􀋓, Endocem􀋓, RetroMTA􀋓를 치수강에 각각 채워넣어 시간에 따른 치경부의 변색을 비교하고자 하였다. 교정적인 이유로 발치된 75개의 소구치를 사용하여 무작위로 4개의 실험군(n = 60)과 한 개의 대조군(n = 15)으로 나누었다. 치아는 CEJ 하방 2 mm로 수평절단 하였다. 각각의 재료들을 제조사의 지시에 따라 준비한 후 치수강에 채워넣고입구를 레진을 이용하여 봉인하였다. 치아 색조 측정은 국제조명위원회(Commission International de I’Eclairage, CIE) 의 CIE L*a*b* system을 사용하였다. 색조는 분광 광도계를 사용하여 재료를 넣기 전, 재료를 넣고 1일, 1주, 2주, 4주, 8 주, 12주, 16주 후로 총 8번 측정하였다. 이원 변량 분산분석(Two way repeated ANOVA)을 사용하여 시간에 따른 CIE L*, a*, b*와 ΔE값을 비교 평가하였고 실험군과 대조군과의 통계적 유의성과 상호관계는 본페로니 검정으로 사후 검정하여p 값이 0.05이하일 때 통계학적으로 유의하다고 간주하였다. Proroot wMTA􀋓는 시간에 따라 계속적인 L*값의 감소를 보였고, Endocem􀋓은 재료를 넣은 직 후 육안으로 인지 불가능한 약간의 회색조 변색을 보였으며, Biodentine􀋓과 RetroMTA􀋓는 상대적으로 다른 재료보다 색 안정성을 보였다. 결론적으로, 방사선 불투과성 물질로서 산화 비스무스가 포함된 Proroot wMTA􀋓와 Endocem􀋓은 치관 변색을 보인 반면, 방사선 불투과성 물질로서 산화 지르코늄이 포함된 Biodentine􀋓과 RetroMTA􀋓는 시간에 따른 유의한 색 변화를 보이지 않았다.

Abstract

Mineral trioxide aggregate have been used for many years as a pulp therapy material. The most widely used product, Proroot white MTA􀋓 has a major drawback that it causes tooth discoloration. This study assessed discoloration of crown when various MTA-based materials were placed in the coronal aspect of the root canal. Seventy-five single-rooted, unrestored premolar teeth were selected. The teeth were randomly assigned to four experimental groups, each of Biodentine􀋓, Proroot wMTA􀋓, Endocem􀋓, RetroMTA􀋓 and one negative control groups. Color measurements were utilized by the Commission International de I’Eclairage’s L*a*b* system with spectrophotometer. The color was assessed eight times : initial, 1 day, 1 week, 2 weeks, 4 weeks, 8 weeks, 12 weeks, and 16 weeks after the placement. Statistical analysis was performed using the 2-way repeated analysis of variance and Bonferroni’s method with p < 0.05. Proroot wMTA􀋓 induced significant decreases in L* values during experiment period. Tooth samples from the Endocem􀋓 group presented indistinct grayish color changes. The Biodentine􀋓 and RetroMTA􀋓 showed color stability. Consequently, while Proroot wMTA􀋓 and Endocem􀋓 that contain bismuth oxide as a radiopacifier showed tooth discoloration, displayed no sign of discoloration Biodentine􀋓 and RetroMTA􀋓 that contain zirconium oxide as a radiopacifier.

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