Title: Shear bond strength of adhesive to KrF excimer laser treated enamel

Authors: M. Sivakumar, Vitor Oliveira, Rui Vilar, Sofia S.A. Oliveira

Addresses: Departamento de Engenharia de Materiais, Instituto Superior Tecnico, Av. Rovisco Pais, 1049-001 Lisboa, Portugal. ' Departamento de Engenharia de Materiais, Instituto Superior Tecnico, Av. Rovisco Pais, 1049-001 Lisboa, Portugal. ' Departamento de Engenharia de Materiais, Instituto Superior Tecnico, Av. Rovisco Pais, 1049-001 Lisboa, Portugal. ' Faculdade de Medicina Dentaria, Universidade de Lisboa, Cidade Universitaria, 1649-003 Lisboa, Portugal

Abstract: The bond strength of resin composite bonded to enamel surfaces treated with KrF excimer laser radiation, acid-etched surfaces and laser treated surfaces subjected to acid-etching was studied using a single plane shear method. Enamel specimens were prepared from freshly extracted healthy incisors. The specimens were subjected to laser treatment with a KrF excimer laser (248 nm) using a fluence of 4 J/cm². The bond strength to acid-etched specimens was greater than laser treated specimens. In contrast, bond strength to laser treated specimens subjected to acid-etching was comparable to those obtained with acid-etched specimens. The analogous bond strength to these specimens as compared to acid etched specimens was probably due to a shift from adhesive to mixed rupture mechanism.

Keywords: lasers; dentistry; laser treated enamel; restorative composite resins; shear bond strength; adhesive strength; adhesives; acid etching; adhesive bonding; teeth.

DOI: 10.1504/IJAT.2010.032839

International Journal of Abrasive Technology, 2010 Vol.3 No.2, pp.133 - 140

Published online: 25 Apr 2010 *

Full-text access for editors Full-text access for subscribers Purchase this article Comment on this article