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http://dx.doi.org/10.5933/JKAPD.2017.44.1.28

Spectrophotometric Analysis of Crown Discoloration Induced by Various MTA Based Materials  

Lim, Yuran (Department of Pediatric Dentistry, College of Dentisty, Chonnam National University)
Choi, Namki (Department of Pediatric Dentistry, College of Dentisty, Chonnam National University)
Kim, Jaehwan (Department of Pediatric Dentistry, College of Dentisty, Chonnam National University)
Kim, Seonmi (Department of Pediatric Dentistry, College of Dentisty, Chonnam National University)
Publication Information
Journal of the korean academy of Pediatric Dentistry / v.44, no.1, 2017 , pp. 28-37 More about this Journal
Abstract
Mineral trioxide aggregate have been used for many years as a pulp therapy material. The most widely used product, Proroot white $MTA^{(R)}$ 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 $Biodentine^{(R)}$, Proroot $wMTA^{(R)}$, $Endocem^{(R)}$, $RetroMTA^{(R)}$ 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 $wMTA^{(R)}$ induced significant decreases in $L^*$ values during experiment period. Tooth samples from the $Endocem^{(R)}$ group presented indistinct grayish color changes. The $Biodentine^{(R)}$ and $RetroMTA^{(R)}$ showed color stability. Consequently, while Proroot $wMTA^{(R)}$ and $Endocem^{(R)}$ that contain bismuth oxide as a radiopacifier showed tooth discoloration, displayed no sign of discoloration $Biodentine^{(R)}$ and $RetroMTA^{(R)}$ that contain zirconium oxide as a radiopacifier.
Keywords
Crown discoloration; Spectrophotometer; Mineral trioxide aggregate; Bismuth oxide; Zirconium oxide; Radiopacifier;
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Times Cited By KSCI : 2  (Citation Analysis)
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