We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Spectrophotometric analysis of coronal discolouration induced by grey and white MTA.
- Authors
Ioannidis, K.; Mistakidis, I.; Beltes, P.; Karagiannis, V.
- Abstract
Aim To evaluate the specific alterations in tooth colour with white and grey MTA when used to fill pulp chambers. Methodology Forty-five fully developed, intact, mandibular third molars were sectioned 1 mm below their cemento-enamel junction ( CEJ). Their pulp chambers were chemo-mechanically debrided, and the specimens were randomly assigned into three groups: Group 1-white MTA (Angelus™), Group 2-grey MTA (Angelus™) and Group 3-negative control (unfilled). During the experimental period, specimens were immersed in vials containing distilled water up to the CEJ (37±1 °C). Spectral reflectance lines were recorded by utilizing a UV-vis spectrophotometer equipped with an integration sphere in the visual spectrum, at baseline, 1 week and 1, 2 and 3 months after placement of the materials. Data were transformed into values of the CIE L* a* b* colour system, and the corresponding Δ Ε values were calculated. The results were analysed using two-way mixed anova models, whilst pairwise comparisons were conducted with Bonferroni's method at P < 0.05 level of significance. Results Both types of MTA induced significant decreases in L*, a* and b* values. The colour change was greater with grey MTA. Grey MTA led to clinically perceptible crown discolouration after 1 month, whilst the total colour change caused by white MTA exceeded the perceptible threshold for the human eye after 3 months. Conclusions The application of both grey and white MTA formulations induced a decrease in lightness and reduction in redness and yellowness in teeth. The present findings suggest that application of grey MTA in the aesthetic zone should be avoided, whilst white MTA should be used with caution when filling pulp chambers with the materials.
- Subjects
SPECTROPHOTOMETRY; DENTAL discoloration; TOOTH cervix; THIRD molars; ANALYSIS of variance; SPECTRAL reflectance; THERAPEUTICS
- Publication
International Endodontic Journal, 2013, Vol 46, Issue 2, p137
- ISSN
0143-2885
- Publication type
Article
- DOI
10.1111/j.1365-2591.2012.02098.x