THE EFFECT OF OZONE TREATMENT ON SHEAR BOND STRENGTH
OF TWO DIFFERENT ADHESIVE SYSTEMS AT VARIOUS AGING
PERIODS TO TOOTH SUBSTRATES
Abdulghani I. Mira*, Mohamed T. Hamed**, Motaz Ghulman*** and Ghada H. Naguib****
ABSTRACT
The purpose of this study was to determine the effect of ozone application on the shear bond
strength of resin composite using two different adhesive systems to both enamel and dentine substrate
after different aging periods.
Three hundred and sixty sound teeth were used in this study. The teeth were divided into two
equal groups according to the tooth substrates. The teeth were received no ozone treatment, 20-
seconds and 40-seconds. Total etch and self-etching adhesive systems were used and a resin composite
cylinders were used to restore all teeth. The teeth were stored in 75 cthanol solution at different
ageing periods.
The results showed that a statistical significant difference was found between the ozone treated
groups and control groups at different aging periods in enamel and dentin for both total etch and
self-etching adhesive systems.
Ozone gas for 20 and 40 seconds is a favorable procedure to improve the shear bond strength
of resin composite to enamel and dentine. Ozone gas for 20 and 40 seconds is a favorable procedure
to reduce bond hydrolysis by aging.
* Assistant Professor, and Consultant Operative / Easthetic Dentistry Depart., Vice Dean for Academic Affairs.
Faculty of Dentistry King Abdulaziz University
** Lecturer of Fixed Prosthodontics Faculty of oral and Dental Medicine, Cairo University.
*** Assistant Professor and Consultant Operative / Easthetic Dentistry, Chairman, Conservative Dental Sciences
Depart.. Faculty of. Dcnti^liy King AbJuIaziz University.
**** Assistant Lecturer of Biomaterials, Faculty of Oral and Dental Medicine, Cairo University.

	Egyptian Dental Journal,53,1529:1545,April 2007