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Analysis of the color alteration and radiopacity promoted by bismuth oxide in calcium silicate cement
Brazilian Oral Research; Marciano, Marina Angelica; Estrela, Carlos; Mondelli, Rafael Francisco Lia; Ordinola-Zapata, Ronald; Duarte, Marco Antonio Hungaro.
Affiliation
  • Marciano, Marina Angelica; Universidade de Sao Paulo. Bauru School of Dentistry. Department of Operative Dentistry, Endodontics and Dental Materials. Bauru. BR
  • Estrela, Carlos; Universidade de Sao Paulo. Bauru School of Dentistry. Department of Operative Dentistry, Endodontics and Dental Materials. Bauru. BR
  • Mondelli, Rafael Francisco Lia; Universidade de Sao Paulo. Bauru School of Dentistry. Department of Operative Dentistry, Endodontics and Dental Materials. Bauru. BR
  • Ordinola-Zapata, Ronald; Universidade de Sao Paulo. Bauru School of Dentistry. Department of Operative Dentistry, Endodontics and Dental Materials. Bauru. BR
  • Duarte, Marco Antonio Hungaro; Universidade de Sao Paulo. Bauru School of Dentistry. Department of Operative Dentistry, Endodontics and Dental Materials. Bauru. BR
Braz. oral res ; 27(4): 318-323, Jul-Aug/2013. tab, graf
Article de En | LILACS | ID: lil-679218
Bibliothèque responsable: BR1.1
ABSTRACT
The aim of the study was to determine if the increase in radiopacity provided by bismuth oxide is related to the color alteration of calcium silicate-based cement. Calcium silicate cement (CSC) was mixed with 0%, 15%, 20%, 30% and 50% of bismuth oxide (BO), determined by weight. Mineral trioxide aggregate (MTA) was the control group. The radiopacity test was performed according to ISO 6876/2001. The color was evaluated using the CIE system. The assessments were performed after 24 hours, 7 and 30 days of setting time, using a spectrophotometer to obtain the ΔE, Δa, Δb and ΔL values. The statistical analyses were performed using the Kruskal-Wallis/Dunn and ANOVA/Tukey tests (p < 0.05). The cements in which bismuth oxide was added showed radiopacity corresponding to the ISO recommendations ( > 3 mm equivalent of Al). The MTA group was statistically similar to the CSC / 30% BO group (p > 0.05). In regard to color, the increase of bismuth oxide resulted in a decrease in the ΔE value of the calcium silicate cement. The CSC group presented statistically higher ΔE values than the CSC / 50% BO group (p < 0.05). The comparison between 24 hours and 7 days showed higher ΔE for the MTA group, with statistical differences for the CSC / 15% BO and CSC / 50% BO groups (p < 0.05). After 30 days, CSC showed statistically higher ΔE values than CSC / 30% BO and CSC / 50% BO (p < 0.05). In conclusion, the increase in radiopacity provided by bismuth oxide has no relation to the color alteration of calcium silicate-based cements.
Sujet(s)
Mots clés

Texte intégral: 1 Indice: LILACS Sujet Principal: Produits d'obturation des canaux radiculaires / Bismuth / Silicates / Coloration de prothèse / Composés du calcium / Ciments dentaires Limites du sujet: Humans langue: En Texte intégral: Braz. oral res Thème du journal: ODONTOLOGIA Année: 2013 Type: Article / Project document

Texte intégral: 1 Indice: LILACS Sujet Principal: Produits d'obturation des canaux radiculaires / Bismuth / Silicates / Coloration de prothèse / Composés du calcium / Ciments dentaires Limites du sujet: Humans langue: En Texte intégral: Braz. oral res Thème du journal: ODONTOLOGIA Année: 2013 Type: Article / Project document