Polyphenol-enriched extract of Arrabidaea chica used as a dentin pretreatment or incorporated into a total-etching adhesive system: Effects on bonding stability and physical characterization

• Published in: Materials Science & Engineering C Vol. 116; p. 111235
• Main Authors: Mendes, Bruna Novaes, Bridi, Enrico Coser, França, Fabiana Mantovani Gomes, Turssi, Cecilia Pedroso, do Amaral, Flávia Lucisano Botelho, Basting, Rosanna Tarkany, de Oliveira Sousa, Ilza Maria, da Silva, Tânia Mara, Gonçalves, Sérgio Eduardo de Paiva, Foglio, Mary Ann, Basting, Roberta Tarkany
• Format: Journal Article
• Language: English
• Published: Netherlands Elsevier B.V 01.11.2020; Elsevier BV
• Subjects: Acid Etching, Dental; Adhesive system; Adhesives; Aqueous solutions; Arrabidaea chica; Bond strength; Bonding strength; Composite Resins; Conversion; Degradation; Degree of conversion; Dental Bonding; Dentin; Dentin-Bonding Agents; Distilled water; Etching; Evaluation; Light scattering; Materials science; Materials Testing; Microscopy, Electron, Scanning; Microtensile bond strength; Particle size; Phosphoric acid; Photon correlation spectroscopy; Physical properties; Plant Extracts; Polydispersity; Polyphenol; Polyphenols; Pretreatment; Pretreatment of water; Resin Cements; Scanning electron microscopy; Stability analysis; Surface Properties; Tensile Strength; Zeta potential; Degradation; Adhesive system; Degree of conversion; Polyphenol; Microtensile bond strength
• ISSN: 0928-4931; 1873-0191
• DOI: 10.1016/j.msec.2020.111235

The aim of this paper was to evaluate the physical properties and the long-term bond strength of a 2.5% polyphenol-enriched extract of Arrabidaea chica (AC) incorporated into both the phosphoric acid and the primer of a three-step total-etch adhesive, or into an aqueous solution as a dentin pretreatment. Fifty dentin surfaces received the treatments (n = 10): CON (control) – application of the three-step adhesive system (Adper Scotchbond Multipurpose, 3M ESPE); WAT – distilled water used as a pretreatment after dentin etching and before application of the adhesive system; ACPA - AC incorporated into the phosphoric acid; ACW - dentin pre-treatment with AC incorporated into an aqueous solution after etching; ACP - AC incorporated into the primer. Microtensile bond strength tests were performed after 24 h, 6 and 12 months of storage. Slices from the resin-dentin interface were obtained for scanning electron microscopy analysis of the hybrid layer. Degree of conversion of AC incorporated into the primer was evaluated. The particle size, polydispersity index and zeta potential of all the solutions prepared by incorporating AC (phosphoric acid, primer and distilled water) were measured by dynamic light scattering, which brought about changes after incorporation. Degree of conversion of the primer was not affected after incorporating AC. ACP showed lower microtensile bond strength values than the other groups. Bond strength decreased after 6 months of storage, stabilizing at the 12-month evaluation. Therefore, use of AC incorporated into the primer led to lower bond strength values, since AC modified the physical properties (particle size, polydispersity index and zeta potential) of the primer, but did not change the degree of conversion. Application of AC as a dentin pretreatment did not affect bond strength or the micromorphological characteristics of the hybrid layer. •Arrabidaea chica changed the physical properties of phosphoric acid and primer.•Arrabidaea chica into phosphoric acid did not influence the bond strength to dentin.•Arrabidaea chica into the phosphoric acid did not dark dentin interface.•There was a decrease of bond strength values to dentin after 6 months•Bond strength values stabilized at 12-month evaluation time.