Spectrophotometric Analysis of Crown Discoloration Induced by Various MTA Based Materials

임유란; Namki Choi; Jaehwan Kim; Kim Seon Mi

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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* 2021년 이후 발행 논문의 참고문헌은 현재 구축 중입니다.

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