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Surface roughness and wear of resin cements after toothbrush abrasion
ISHIKIRIAMA, Sérgio Kiyoshi; ORDOÑÉZ-AGUILERA, Juan Fernando; MAENOSONO, Rafael Massunari; VOLÚ, Fernanda Lessa Amaral; MONDELLI, Rafael Francisco Lia.
  • ISHIKIRIAMA, Sérgio Kiyoshi; Universidade de São Paulo. Bauru School of Dentistry. Department of Operative Dentistry. Endodontics and Dental Materials. Bauru. BR
  • ORDOÑÉZ-AGUILERA, Juan Fernando; Universidade de São Paulo. Bauru School of Dentistry. Department of Operative Dentistry. Endodontics and Dental Materials. Bauru. BR
  • MAENOSONO, Rafael Massunari; Universidade de São Paulo. Bauru School of Dentistry. Department of Operative Dentistry. Endodontics and Dental Materials. Bauru. BR
  • VOLÚ, Fernanda Lessa Amaral; Universidade de São Paulo. Bauru School of Dentistry. Department of Operative Dentistry. Endodontics and Dental Materials. Bauru. BR
  • MONDELLI, Rafael Francisco Lia; Universidade de São Paulo. Bauru School of Dentistry. Department of Operative Dentistry. Endodontics and Dental Materials. Bauru. BR
Braz. oral res. (Online) ; 29(1): 1-5, 2015. tab, ilus
Artigo em Inglês | LILACS | ID: lil-777244
ABSTRACT
Increased surface roughness and wear of resin cements may cause failure of indirect restorations. The aim of this study was to evaluate quantitatively the surface roughness change and the vertical wear of four resin cements subjected to mechanical toothbrushing abrasion. Ten rectangular specimens (15 × 5 × 4 mm) were fabricated according to manufacturer instructions for each group (n = 10) Nexus 3, Kerr (NX3); RelyX ARC, 3M ESPE (ARC); RelyX U100, 3M ESPE (U100); and Variolink II, Ivoclar/Vivadent (VL2). Initial roughness (Ra, µm) was obtained through 5 readings with a roughness meter. Specimens were then subjected to toothbrushing abrasion (100,000 cycles), and further evaluation was conducted for final roughness. Vertical wear (µm) was quantified by 3 readings of the real profile between control and brushed surfaces. Data were subjected to analysis of variance, followed by Tukey’s test (p < 0.05). The Pearson correlation test was performed between the surface roughness change and wear (p < 0.05). The mean values of initial/final roughness (Ra, µm)/wear (µm) were as follows NX3 (0.078/0.127/23.175); ARC (0.086/0.246/20.263); U100 (0.296/0.589/16.952); and VL2 (0.313/0.512/22.876). Toothbrushing abrasion increased surface roughness and wear of all resin cements tested, although no correlation was found between those variables. Vertical wear was similar among groups; however, it was considered high and may lead to gap formation in indirect restorations.
Assuntos


Texto completo: DisponíveL Índice: LILACS (Américas) Assunto principal: Abrasão Dentária / Escovação Dentária / Cimentos de Resina / Desgaste de Restauração Dentária Idioma: Inglês Revista: Braz. oral res. (Online) Assunto da revista: Odontologia Ano de publicação: 2015 Tipo de documento: Artigo / Documento de projeto País de afiliação: Brasil Instituição/País de afiliação: Universidade de São Paulo/BR

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Texto completo: DisponíveL Índice: LILACS (Américas) Assunto principal: Abrasão Dentária / Escovação Dentária / Cimentos de Resina / Desgaste de Restauração Dentária Idioma: Inglês Revista: Braz. oral res. (Online) Assunto da revista: Odontologia Ano de publicação: 2015 Tipo de documento: Artigo / Documento de projeto País de afiliação: Brasil Instituição/País de afiliação: Universidade de São Paulo/BR