Evaluation of different mechanical surface treatments in tensile strength of direct<br /> composite resin repairs
Journal Title: RSBO - Year 2005, Vol 2, Issue 1
Abstract
The aim of this study was to compare the effect of different mechanical surface treatments in the tensile strength of direct composite resin repairs. 12 specimens were obtained in halter form, for the control group, and 24 in hemi-halter form for the other experimental groups. The specimens were stored for 30 days in artificial saliva before being repaired. The experimental groups were repaired after the mechanical surface treatment,through the mechanical retentions in the repairing surface, and also after the surface roughening with an air abrasion system. After mechanical treatment, the surface was etched with phosphoric acid and the adhesive system was used without a previous photo polymerizing to the repair material addition. After the tensile strength test it was observed that the group treated by macro-mechanical retentions presented significantly inferior strength values compared to the control group. Moreover, there were not observed significant differences among repaired groups,regardless mechanical surface treatment. Based on the results it was possible to conclude that air abrasion provided strength values in composite resin repairs similar to cohesive strength.
Authors and Affiliations
Daniela MINATTI, Celso YAMASHITA, Luciano MADEIRA
Keywords
Related Articles
- EP ID EP134295
- DOI -
- Views 174
- Downloads 0
Evaluation of cleaning efficacy of a nickel-titanium rotary system, with or without 17% EDTA passive ultrasonic activation: a scanning electron microscopic study
Introduction: The goal of endodontic instrumentation is to promote root canal cleaning and shaping to prepare it for the subsequent three-dimensional filling. Objective: The aim of this study was to evaluate, ex vivo, ro...
líquen plano oral
Introduction: Lichen Planus is a mucosal disorder of established munemediated pathogenesis, that affects skin and/or mucosa. In general, studies disclose that the prevalence varies of 0,02 to 1,2.% of the populatio...
Evaluation of the cytotoxicity of three root canal sealers used in obturation of radicular canals system
Introduction and objective: To determine in vitro the cytotoxicity of a zinc oxide-eugenol based sealer (Endofill) and two others epoxy resin based sealers (Sealers 26 and AH Plus) under the VERO C1008 cells line.Materia...
Staining susceptibility of methacrylate and silorane-based materials: influence of resin type and storage time
Introduction: The color stability of composite resins is a fundamental factor in their clinical behavior. Objective: To evaluate the color stability of composite resins of different colors exposed to a cola-based...
Prevalence of salivary glands lesions from histopathologic diagnosis of Experimental Pathology Laboratory of PUCPR in the period of 1999-2008
Introduction: Lesions that affect salivary glands are a group of clinic entities ranging from local pathological alterations to the manifestation of systemic diseases. Objective: The aim of this study was to observe the...