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Coronal tooth discoloration and white mineral trioxide aggregate
Daniel Felman1, Peter Parashos
1Melbourne Dental School, University of Melbourne, Melbourne, Victoria, Australia.
Journal of Endodontics
|March 26, 2013
Summary
White mineral trioxide aggregate (wMTA) causes tooth discoloration, particularly when exposed to blood. This study found that blood significantly worsens the graying effect of wMTA in root canal treated teeth.
Area of Science:
- Endodontics
- Dental Materials Science
- Biomaterials
Background:
- Tooth discoloration is a concern following root canal therapy.
- White mineral trioxide aggregate (wMTA) is used in endodontic procedures.
- The potential for wMTA to cause discoloration requires thorough investigation.
Purpose of the Study:
- To assess and characterize tooth discoloration caused by white MTA (wMTA).
- To evaluate the influence of red blood cells on wMTA-induced discoloration.
- To determine the extent and location of discoloration in the coronal aspect of root canal treated teeth.
Main Methods:
- Ex vivo assessment of root canal treated teeth.
- Restoration of root canals with wMTA, wMTA + saline, or wMTA + blood.
- Color assessment using CIE L*a*b* color space and digital photography at baseline, day 1, and day 35.
- Statistical analysis using ANOVA and t-tests.
Main Results:
- All teeth restored with wMTA exhibited discoloration.
- Discoloration was most pronounced in the cervical third of the crown.
- The presence of blood adjacent to setting wMTA significantly exacerbated tooth discoloration (P = .03).
Conclusions:
- White MTA (wMTA) is an inducer of gray tooth discoloration.
- The presence of blood compounds the discoloring effect of wMTA.
- Clinical management should consider the potential for blood contamination during wMTA placement.
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