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.
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