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Influence of core-finishing intervals on tensile strength of cast posts-and-cores luted with zinc phosphate cement
Iglesias, Michele Andrea Lopes; Mesquita, Gabriela Campos; Pereira, Analice Giovani; Dantas, Lucas Costa de Medeiros; Raposo, Luís Henrique Araújo; Soares, Carlos José; Mota, Adérito Soares da.
Afiliação
  • Iglesias, Michele Andrea Lopes; Federal University of Uberlândia. School of Dentistry. Department of Occlusion, Fixed Prosthodontics and Dental Materials. Uberlândia. BR
  • Mesquita, Gabriela Campos; Federal University of Uberlândia. School of Dentistry. Department of Occlusion, Fixed Prosthodontics and Dental Materials. Uberlândia. BR
  • Pereira, Analice Giovani; Federal University of Uberlândia. School of Dentistry. Department of Operative Dentistry and Dental Materials. Uberlândia. BR
  • Dantas, Lucas Costa de Medeiros; Federal University of Uberlândia. School of Dentistry. Department of Occlusion, Fixed Prosthodontics and Dental Materials. Uberlândia. BR
  • Raposo, Luís Henrique Araújo; Federal University of Uberlândia. School of Dentistry. Department of Operative Dentistry and Dental Materials. Uberlândia. BR
  • Soares, Carlos José; Federal University of Uberlândia. School of Dentistry. Department of Operative Dentistry and Dental Materials. Uberlândia. BR
  • Mota, Adérito Soares da; Federal University of Uberlândia. School of Dentistry. Department of Occlusion, Fixed Prosthodontics and Dental Materials. Uberlândia. BR
Braz. oral res ; 26(4): 378-383, July-Aug. 2012. ilus, tab
Artigo em Inglês | LILACS | ID: lil-640712
Biblioteca responsável: BR1.1
ABSTRACT
The core finishing of cast posts-and-cores after luting is routine in dental practice. However, the effects of the vibrations produced by the rotary cutting instruments over the luting cements are not well-documented. This study evaluated the influence of the time intervals that elapsed between the cementation and the core-finishing procedures on the tensile strength of cast posts-and-cores luted with zinc phosphate cement. Forty-eight bovine incisor roots were selected, endodontically treated, and divided into four groups (n = 12) GA, control (without finishing); GB, GC, and GD, subjected to finishing at 20 minutes, 60 minutes, and 24 hours after cementation, respectively. Root canals were molded, and the resin patterns were cast in copper-aluminum alloy. Cast posts-and-cores were luted with zinc phosphate cement, and the core-finishing procedures were applied according to the groups. The tensile tests were performed at a crosshead speed of 0.5 mm/min for all groups, 24 hours after the core-finishing procedures. The data were subjected to one-way analysis of variance (ANOVA) and Tukey's test (α = 0.05). No significant differences were observed in the tensile strengths between the control and experimental groups, regardless of the time interval that elapsed between the luting and finishing steps. Within the limitations of the present study, it was demonstrated that the core-finishing procedures and time intervals that elapsed after luting did not appear to affect the retention of cast posts-and-cores when zinc phosphate cement was used.
Assuntos


Texto completo: Disponível Coleções: Bases de dados internacionais Base de dados: LILACS Assunto principal: Cimento de Fosfato de Zinco / Técnica para Retentor Intrarradicular / Polimento Dentário Limite: Animais Idioma: Inglês Revista: Braz. oral res Assunto da revista: Odontologia Ano de publicação: 2012 Tipo de documento: Artigo País de afiliação: Brasil Instituição/País de afiliação: Federal University of Uberlândia/BR

Texto completo: Disponível Coleções: Bases de dados internacionais Base de dados: LILACS Assunto principal: Cimento de Fosfato de Zinco / Técnica para Retentor Intrarradicular / Polimento Dentário Limite: Animais Idioma: Inglês Revista: Braz. oral res Assunto da revista: Odontologia Ano de publicação: 2012 Tipo de documento: Artigo País de afiliação: Brasil Instituição/País de afiliação: Federal University of Uberlândia/BR
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