A comparative study of shear bond strength of orthodontic bracket after acid-etched and Er:YAG treatment on enamel surface

摘要

This study aimed to evaluate the shear bond strength (SBS) of teeth prepared for orthodontic bracket bonding with 37% phosphoric acid and Er:YAG laser. Forty bovine incisors were divided into two groups. In Group Ⅰ, the teeth were conditioned with 37% phosphoric acid and brackets were bonded with Transbond XT; in Group Ⅱ, the teeth were irradiated with Er:YAG and bonding with Transbond XT. After SBS test, the adhesive remnant index was determined. Adhesion to dental hard tissues after Er:YAG laser etching was inferior to that obtained after acid etching but exceeded what is believed to be clinically sufficient strength, and therefore can be used in patients.