Clinical Performance of Light-cured Orthodontic Adhesives for Bonding Brackets – An In-vitro Study.
Description
This was an in-vitro study conducted on 80 extracted maxillary premolars. Teeth with the sound crown structure were acid etched and bonded with brackets on their buccal surfaces utilizing primer and light-cured adhesives into four equal groups, which are Transbond XT, Heliosit, Enlight, and Bracepaste. Shear Bond Strength (SBS) for de-bonding the brackets were evaluated with Instron- testing machine after 48 hours. The de-bonded samples’ Adhesive Remnant Index (ARI) scores were also measured.
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Steps to reproduce
Eighty intact maxillary premolars with a sound crown structure were collected and mounted onto a cold acrylic block. The teeth were acid etched and bonded with brackets on their buccal surfaces utilizing primer and light-cured adhesives into four equal groups, which are Transbond XT, Heliosit, Enlight, and Bracepaste. In this study, an Instron Universal Testing Machine was used to evaluate the shear force needed to detach the brackets fixed on the labial surface of the mounted teeth. Scaled digital pictures of each bracket base were photographed using Canon DSLR 1500 D camera with a 100mm macro lens to take high-resolution photos needed to score Adhesive Remanent Index. An automated count of the number of pixels was performed to compute the ARI percentages using Photoshop software (Adobe Systems inc, Mountain View, calif).