Do Different Pretreatments of Dentine Surface Affect the Bond Strength with a Self-adhesive Resin Cement?

Autor(es)

Reis, Bruna de Oliveira ^[1] ; de Lima Godas, Andre Gustavo ^[1] ; Umeda Suzuki, Thais Yumi ^[1] ; Fagundes Tozzi, Ticiane Cestari ^[1] ; Fraga Briso, Andre Luiz ^[1] ; dos Santos, Paulo Henrique ^[2]

Afiliação do(s) autor(es)

^[1] Sao Paulo State Univ, UNESP, Aracatuba Sch Dent, Dept Restorat Dent, 1193 Jose Bonifacio St, BR-16015050 Aracatuba, SP - Brazil

^[2] Sao Paulo State Univ, UNESP, Aracatuba Sch Dent, Dept Dent Mat & Prosthodont, Aracatuba, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: ORAL HEALTH & PREVENTIVE DENTISTRY; v. 18, n. 2, p. 145-151, MAR-APR 2020.
• Citações Web of Science: 0

Resumo

Purpose: To evaluate the microtensile bond strength of dentine/self-adhesive resin cement interface after several treatments on a dentine surface. Materials and Methods: Twenty-eight human molars were selected and divided into four groups: no treatment (control (C)); 2% chlorhexidine digluconate (CHX); 25% polyacrylic acid (PA); and 23 ppm dispersive solution of silver nanoparticle (SN). Prepolymerised TPH resin composite (Dentsply) blocks were luted on the dentine surface using RelyX 0200 self-adhesive resin cement (3M ESPE). Microtensile bond strength was measured (MPa) in a universal testing machine 24 h and 6 months after the bonding process. The fractured specimens were examined in an optical microscope and classified according to the fracture pattern. A representative sample of each group was observed by scanning electronic microscope. Data were submitted to analysis of variance (ANOVA) and Tukey's test to compare the mean among the groups (p <0.05). Results: The highest microtensile bond strength values after 24 h were found for the PA group (13.34 +/- 6.36 MPa), with no statistically significant difference for the C group (9.76 +/- 3.11 Mpa). After 6 months, the highest microtensile bond strength values were found for the C group (9.09 +/- 3.27 Mpa), with statistically significant difference only for the CHX group (2.94 +/- 1.66 MPa). There was statistically significant difference only for the PA group when comparing the periods studied. Regardless of the surface treatment applied, there were more adhesive failures in both periods of time. Conclusion: Dentinal pretreatment with PA, as well as use of SN before the bonding procedure of self-adhesive resin cement to dentine, may be alternative bonding protocols. (AU)

• Processo FAPESP: 13/26397-4 - Influência de soluções irrigadoras na resistência de união de um cimento resinoso autoadesivo à dentina
• Beneficiário: Bruna de Oliveira Reis
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica