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In vitro evaluation of microleakage under orthodontic brackets bonded with different adhesive systems

par Atash, Ramin ;Fneiche, Ali ;Cetik, Sibel ;Bahrami, Babak ;Balon-Perin, Alain ;Valvekens, Maria Orellana ;Glineur, Régine
Référence European Journal of Dentistry, 11, 2, page (180-185)
Publication Publié, 2017

Article révisé par les pairs

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Résumé :

Objective: Adhesives systems have a drawback when utilized for bonding orthodontic brackets: they shrink during photopolymerization creating microleakage. The aim of this study was to assess the stability of different orthodontic adhesives around brackets and enamel. Materials and Methods: Sixty noncarious mandibular premolars extracted for orthodontic reasons were randomly divided into six groups of adhesives used for bonding brackets to dental enamel: NeoBond® Light Cure Adhesive Kit, Transbond™ Plus Self-Etching, Victory V-Slot APC PLUS® + Transbond™ MIP, Rely-A-Bond® Kit, Light Cure Orthodontic Adhesive Kit (OptiBond®), and Transbond™ MIP. Following bonding, all teeth underwent 2500 cycles of thermal cycling in baths ranging from 5°C to 55°C before being immersed in 2% methylene blue for 24 h. All samples were examined under a binocular microscope to assess the degree of microleakage at the "bracket-adhesive" and "adhesive-enamel" interfaces in the gingival and occlusal regions of the bracket. Results: A significant difference was found at the "occlusal bracket-adhesive" interface. The highest microleakage values were found in the occlusal region, although no significant. Microleakage was observed in all groups. Conclusion: Group 2 had the highest microleakage values whereas Group 6 had the lowest values.