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Original Articles

Bond strength of orthodontic lingual buttons bonded with different adhesive systems

2009, Volumen 39, Número 1
Rogelio José Scougall Vilchis, Chrisel Zárate Díaz, Wakamatsu Nobukazu, Nakagawa Takeharu
DDS, MDSc & Orthod, PhD. Departamento de Ortodoncia. Centro de Investigación y Estudios Avanzados en Odontología (CIEAO). Facultad de Odontología. Universidad Autónoma del Estado de México

To evaluate the bond strength of orthodontic lingual buttons adhered to etched and self-etched dental enamel by using two different composite resins. Methods: A total of 80 extracted bicuspid were randomly divided into four groups (n = 20). Groups I (control), the enamel was conditioned with 37% phosphoric acid and lingual buttons were bonded with Transbond XT. In the experimental groups the lingual buttons were bonded with BeautyOrtho Bond and the enamel was conditioned with: 37% phosphoric acid (group II); Transbond Plus SEP (group III); Primers A & B (group IV). In all groups the lingual buttons were light-cured for 20 s. The samples were stored (37 °C, 24 h), the bond strength was tested (0.5 mm/min) and statistically analyzed (mean, standard deviation, range, Scheffè and Weibull). The adhesive remnant index (ARI) was also recorded and statistically analyzed with χ2. Results: All groups showed mean values of bond strength higher than the force suggested as necessary for orthodontic movement. Group I (14.3 ± 2.9 MPa), was significantly higher than groups II (11.2 ± 2.1 MPa) and IV (11.4 ± 1.8 MPa), however it was not significantly higher than group III (12.4 ± 2.7 Mpa). Concerning ARI, there were not significant differences; nevertheless, the groups in where the enamel was conditioned with self-etching primers the amount was slightly lesser. Conclusions: The bond strength yielded by all groups might be clinically acceptable. Although the value obtained in group I was the highest, the use of self-etching primers for bonding orthodontic lingual buttons can be beneficial because these conditioners present lower sensitivity to humidity.  (Rev Esp Ortod. 2009;39(1):033-038)

Key words:
Lingual buttons. Bond strength. Adhesive remnant.
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