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Analysis of the color change promoted by repair materials and calcium silicate-based endodontic cements with different radiopacifiers

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Rafaela Nanami Handa Inada
Total Authors: 1
Document type: Master's Dissertation
Press: Araraquara. 2018-05-03.
Institution: Universidade Estadual Paulista (Unesp). Faculdade de Odontologia. Araraquara
Defense date:
Advisor: Mário Tanomaru Filho

Repair materials and endodontic sealers should not promote tooth staining. This study was divided into 3 publications. Publication 1 - evaluation of dental discoloration of tricalcium silicate (TSC) cements associated with bismuth oxide (TC-Bi), zirconium oxide (TC-Zr), niobium oxide (TC-Nb) and Biodentine (BD). Publication 2 - comparison of the color effects induced by TSC-Bi cements and tricalcium silicate with calcium tungstate (TSC-TC), MTA Angelus (MTA) and MTA HP Repair (MTAHP). Publication 3 - evaluation of color changes by endodontic cements, AH Plus (AHP), MTA Fillapex (MTAF), Total Fill BC Sealer (TF) and NeoMTA Plus (NMTAP). Bovine teeth were sectioned to obtain vestibular and palatine sections. In the internal vestibular face, two cavities were performed, one in the coronary portion and the other one in the root, which were filled with the materials, and triantibiotic paste as the positive control (CP) and cavities with no filling as the negative control (CN). The measurement of the color change (ΔE) was performed with a spectrophotometer, before insertion of the materials (T0), immediately after insertion (T1) and after 7 (T7), 15 (T15), 30 (T30), 60 (T60), 120 (T120) and 180 (T180) days. The data were evaluated by Variance Analysis of repeated measurements at two criteria and Post Hoc LSD-Fisher test, both with a significance level of 5%. Publication 1 - in the coronary portion TSC and CP presented higher ΔE in T180 compared to T1 (p <0,05). Only TSC-Zr and TSC-Nb presented mean values of L * (luminosity) higher than CN and CP lower values (p <0,05). In the root portion, CN and CP presented higher ΔE in T180 compared to T1. TSC-Nb presented values of L * higher than CN and CP lower values (p <0,05). Publication 2 - TSC-Bi and TSC-TC did not show different ΔE in the periods T1 and T180 (p≥0,05), as the average values of L * were similar to the CN (p≥0,05), in the portion coronary artery. In the root portion besides TSC-Bi and TSC-TC, MTA had no different ΔE in T180 (p≥0,05), but mean values of L * less than CN was observed for MTA and CP. Publication 3 - just NMTAP had a ΔE statistically similar in T180 compared to T1 in both regions (p≥0,05). In the coronary portion just, CP and MTAF presented lower values of L * than CN (p<0,05). In the root portion only, CP presented lower mean L * values. (p<0,05). We conclude that Publication 1 - at the end of 180 days TSC, TSC-Bi, TSC-Zr, TSC-NB, and BD did not show dark color change. Publication 2 - MTAHP TSC-Bi and TSC-TC did not promote dental discoloration after 180 days, which occurs with MTA. Publication 3 - AHP, TF, and NMTAP did not promote dental discoloration. MTAF promoted dark discoloration in the coronary portion. (AU)

FAPESP's process: 16/05980-1 - Analysis of dental discoloration promoted by different biomaterials and sealers based on calcium silicate
Grantee:Rafaela Nanami Handa Inada
Support type: Scholarships in Brazil - Master