In vitro biological and adhesive properties of universal adhesive systems on sound and caries-affected dentine: 18 months

Gutiérrez, Mário Felipe; Alegría-Acevedo, L F; Nuñez, Alejandra; Méndez-Bauer, Luján; Ñaupari-Villasante, Romina; Souza, Jullian Josnei de; Buvinic, Sonja; Dávila-Sánchez, Andrés; Fernández, Eduardo; Loguércio, Alessandro Dourado

doi:10.1016/j.ijadhadh.2022.103107

Cited by 1 publication

(1 citation statement)

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“…Poor performance in terms of microtensile bond strength and nanoleakage was observed when the adhesives were applied in caries-affected dentin, mainly after 18 months. Additionally, not all universal adhesives behaved the same in terms of antimicrobial activity and cytotoxicity [5].…”

Section: Introductionmentioning

confidence: 95%

Comparative Study on Interface Fracture of 4th Generation 3-Steps Adhesive and 7th Generation Universal Adhesive

Călinoiu,

Bîcleșanu,

Florescu

et al. 2023

Materials

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The purpose of this paper is to compare the fracture behavior of interfaces obtained using fourth-generation and universal dental adhesives. The study relies on optic and SEM to evaluate the dentin–adhesive–restoration material interface of the samples and also on FEA simulation of fracture behavior. Specimen fabrication relied on 20 extracted teeth, in which class I cavities were created according to a protocol established based on the rules of minimally invasive therapy. For the direct adhesive technique, the adhesives used were: three-step All Bond, three-batch A and one-step Clearfil Universal Bond Quick-batch B. The restoration was performed with the same composite for both adhesives: Gradia direct posterior. The simulation used a 3D reconstructed molar on which geometric operations were performed to obtain an assembly that replicated a physical specimen. Material properties were applied to each component based on the information found in the literature. A simplified model for crack propagation was constructed, and using the fracture mechanics tool in Ansys 2019, the stress intensity factors that act at the crack tip of the adhesive interface were obtained. Mechanical simulation and microscopic investigation showed us how the interface of the dentine–adhesive–filling material performed in cases of both dental adhesives and for a certain loading condition. Important differences were identified among the adhesives, the fourth generation being superior to the fourth generation especially due to the separate steps in which the tooth surface was prepared for adhesion.

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Section: Introductionmentioning

confidence: 95%