Effect of acidic solutions present in the diet on the surface roughness of microhybrid composite resins

Abstract

The objective of this study was to evaluate in vitro the roughness and surface morphology of composite resins (CRs) stored for 180 days in acidic solutions present in the diet. Three micro-hybrid composite resins were used in this study (Charisma, Opallis, and Esthet-X). Fifty-one specimens were made of each material with 4 mm in diameter and 2 mm thick with the aid of an elastomer matrix. After photoactivation for 40 seconds (Elipar Free-Light / 3M ESPE), the specimens were stored in distilled water for 24 hours at 37ºC for subsequent surface polishing with Soft Lex / 3M ESPE discs in fine and extra-fine granulation. Then, the specimens were dried with absorbent paper and the surface roughness was measured using a rugosimeter. The specimens were then randomly divided into five groups (n=10) according to the tested solutions: DW - Distilled water (pH 5.30); RW - Red Wine / Trapiche Syha Ind. Argentina red wine (pH 3.68); CK – Coke / Coca Cola Co. (pH 2.73), OJ - Orange juice / Purity Cocamar (pH 3.58) and LBS - lactate buffer solution (pH 2.74). The tested solutions were changed daily. The surface roughness test was repeated after 15, 90 and 180 days of immersion. The average values of surface roughness were submitted to LSmeans analysis and Tukey-Kramer test, at a significance level of 5%. The results of surface roughness revealed that all CRs showed a significant increase in the roughness values over time for all tested solutions.

Rational durability of optical properties of chameleon effect of Omnichroma and Essentia composite thermocycled in black dark drinks (in vitro study)

“…The explanation was assured from FTIR results as the intensities of both types of composites were decreased after 5000 cycles. In addition to the acidic pH nature of both cola and coffee might be promoted the release of unreacted monomers and inorganic fillers, in agreement with (Camilotti et al 2022).…”

The Effect of Aging by Acidic Solutions, that Simulate the Oral Conditions of Patients with Nervous Bulimia, on the Bond Strength of Repairs Influenced Using Different Bulk Fill and Nanoparticulate Composites

“…Thus, the findings of the present study appear to be justified by the ability of modern composites to resist the action of acid solutions. Further, 30-day storage in water can provide an aged composite surface [24] with reduced radical activity of monomer functional groups. In this sense, the aging protocol for composites used in the present experimental design may have yielded conditions resulting in similar adhesive resistance between the DW and NA groups.…”

“…Therefore, the repair of composite restorations is a conservative alternative for partial replacement of the infiltrated restorative material and allows the preservation of part of the restoration and the healthy dental tissue [2]. Optimal bonding in the interface between the surfaces of the old restoration and the repair layer is a critical factor in such repair procedures, and the development of such bonding is reflected in the magnitude of the interfacial bond strength [3].…”

Avaliação do estado de conservação dos aparelhos fotoativadores da universidade estadual da paraíba – Campus VIII

“…Dentre os materiais adesivos disponíveis no mercado odontológico, as resinas compostas têm se destacado bastante por serem frequentemente utilizadas em procedimentos reabilitadores nos dias atuais em virtude de atenderem às expectativas estéticas e funcionais (Gonçalves, et al, 2013;Camilotti, et al, 2022;Rodrigues, et al, 2021). As fontes de luz, também chamadas de unidades de fotoativação, são os equipamentos odontológicos responsáveis pela fotopolimerização, isto é, pela emissão de energia luminosa que consequentemente origina as cadeias poliméricas dos materiais à base de resina composta (Barata, et al, 2021;Sousa et al, 2020).…”