Interfacial Ultramorphology Evaluation of Resin Luting Cements to Dentin: A Correlative Scanning Electron Microscopy and Transmission Electron Microscopy Analysis

Autor(es)

Aguiar, Thaiane Rodrigues ^[1] ; Vermelho, Paulo Moreira ^[1] ; Andre, Carolina Bosso ^[1] ; Giannini, Marcelo ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, Piracicaba Dent Sch, Dept Restorat Dent, BR-13414900 Piracicaba, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: MICROSCOPY RESEARCH AND TECHNIQUE; v. 76, n. 12, p. 1234-1239, DEC 2013.
• Citações Web of Science: 6

Resumo

The objective of this study was to analyze the dentin-resin cements interfacial ultramorphologies using two different methods: scanning (SEM) and transmission electron microscopy (TEM). Four commercial products were evaluated: two conventional cementing system (RelyX ARC/Adper Scotchbond Multi-Purpose Plus, 3M ESPE and Clearfil Esthetic Cement/DC Bond, Kuraray) and two self-adhesive resin cements (RelyX Unicem, 3M ESPE and Clearfil SA Cement, Kuraray). Prepolymerized resin disks (Sinfony, 3M ESPE) were cemented on oclusal dentin surfaces of 24 third human molars, simulating the indirect restorations. After 24 h, teeth were sectioned into 0.9-mm thick slabs and processed for microscopy analyses (SEM or TEM/ n = 3). Qualitative characterization of dentin-resin cement interface was performed. Hybrid layer formation with long and dense resin tags was observed only for RelyX ARC cementing system. Clearfil Esthetic Cement/DC Bond system revealed few and short resin tags formation, whereas no hybridization and resin tags were detected for self-adhesive resin cements. Some interfacial regions exhibited that the self-adhesive resin cements were not bonded to dentin, presenting bubbles or voids at the interfaces. In conclusion, TEM and SEM bonding interface analyses showed ultramorphological variations among resin cements, which are directly related to dental bonding strategies used for each resin cement tested. Microsc. Res. Tech. 76:1234-1239, 2013. (c) 2013 Wiley Periodicals, Inc. (AU)

• Processo FAPESP: 09/51674-6 - Estudo dos cimentos resinosos convencionais e autoadesivos: ultramorfologia e resistência de união à dentina imediata e a longo prazo, análise do grau de conversão e caracterização das partículas de carga
• Beneficiário: Marcelo Giannini
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 09/51281-4 - Estudo dos cimentos resinosos convencionais e autoadesivos: ultramorfologia e resistência de união à dentina imediata e a longo prazo, análise do grau de conversão e caracterização das partículas de carga
• Beneficiário: Thaiane Rodrigues Aguiar
• Modalidade de apoio: Bolsas no Brasil - Doutorado