Efficacy of Polyacrylic Acid as a Conditioning Agent on the Bond Strength of Self-adhesive Resin Cements to Dental Enamel

Autor(es)

Chrisostomo, Daniela Alvim ^[1] ; Strazzi-Sahyon, Henrico Badaoui ^[1] ; Fraga Briso, Andre Luiz ^[2] ; dos Santos, Paulo Henrique ^[1]

Afiliação do(s) autor(es)

^[1] Sao Paulo State Univ UNESP, Dept Dent Mat & Prosthodont, Aracatuba Sch Dent, Aracatuba, SP - Brazil

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

• Tipo de documento: Artigo Científico
• Fonte: ORAL HEALTH & PREVENTIVE DENTISTRY; v. 18, n. 4, p. 747-756, JUL-AUG 2020.
• Citações Web of Science: 0

Resumo

Purpose: This in vitro study evaluated the effectiveness of polyacrylic acid as an acid etchant similar to phosphoric acid and its effect on the microtensile bond strength of self-adhesive resin cement to enamel. Materials and Methods: Ninety Te-Econom Plus resin blocks (11 x 4 mm) were cemented onto bovine enamel and distributed into 10 groups according to the surface treatments (no surface treatment; etching with 37% phosphoric acid; etching with 20% polyacrylic acid; etching with 37% phosphoric acid + dental adhesive, and etching with 20% polyacrylic acid + dental adhesive) and the self-adhesive resin cements used (RelyX U200 and MaxCem Elite) (n = 9). After bonding, the specimens were sectioned into sticks, subjected to thermocycling (5760 cycles, 5 degrees C and 55 degrees C) and microtensile bond strength testing (n = 6). Images of representative specimens were obtained using a scanning electron microscope. Enamel penetration evaluation of different surface treatments was analysed by confocal laser scanning microscopy (n = 3). Data on bond strength were subjected to 2-way ANOVA and Tukey's least significant difference test (alpha = 0.05). Results: Both 37% phosphoric acid and 20% polyacrylic acid yielded the same microtensile bond strength between self-adhesive resin cement and enamel, independent of the application of dental adhesives (p > 0.05). MaxCem Elite showed higher bond strength values than RelyX U200 just for the 20% polyacrylic acid group (p = 0.001). Conclusion: Acid pre-conditioning of dental enamel may influence the bond strength of self-adhesive resin cement to enamel, and 20% polyacrylic acid showed efficacy similar to that of 37% phosphoric acid. (AU)

• Processo FAPESP: 16/04395-8 - Resistência de união de cimentos resinosos autoadesivos ao esmalte dentário com diferentes tratamentos de superfície
• Beneficiário: Daniela Alvim Chrisostomo
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica