Serviços Personalizados
Journal
Artigo
Indicadores
Citado por SciELO
Acessos
Links relacionados
Citado por Google
Similares em SciELO
Similares em Google
Compartilhar
Revista Facultad de Odontología Universidad de Antioquia
versão impressa ISSN 0121-246X
Resumo
PIEDRA-SARMIENTO, Liliana Andrea; ARIZA-SALAS, María Claudia; GUZMAN-BAEZ, Humberto José e ZARATE-CADENA, Fernando. COMPARISON OF DEBONDING RESISTANCE AND FAILURE TYPE OF THREE ORTHODONTIC BAND CEMENTS. Rev Fac Odontol Univ Antioq [online]. 2016, vol.28, n.1, pp.95-111. ISSN 0121-246X. https://doi.org/10.17533/udea.rfo.v28n1a5.
Introduction:
the objective of this study was to compare the debonding resistance and failure type observed in three materials used for band cementation by means of the universal testing machine and a stereomicroscope.
Methods:
72 third lower molars were collected from patients who needed extractions; metal bands were cemented on them with a pre-soldered tube and internal etching (Bracket USED, OrthoUSA, USA). The samples were randomly sorted out in three groups, forming a control group (zinc phosphate) and two pilot groups (resin-modified glass ionomer and polyacid-modified composite resin). All samples were subjected to a process of 2000 thermal cycles, and later to a debonding resistance test in the universal testing machine (Instron 3367 class 0.5, with 0-30 Kn load cell, USA) at a speed of 2 mm/min. The data were calculated in megapascals, taking into account the surface area of bands (mm2). Finally, to determine failure type, a visual inspection was conducted using a stereomicroscope (Stemi 2000C, Carl Zeiss, Göttingen, Germany AXIOCAM Carl Zeiss Microimaging, Göttingen, Germany).
Results:
no statistically significant differences were found among the three study groups in terms of debonding resistance (p value = 0.119). The most predominant failure type in the three cements occurred at the cemento-enamel interphase, with 61.1%, showing a statistically significant difference.
Conclusion:
zinc phosphate, resin-modified glass ionomer and polyacid-modified composite resin showed similar debonding resistance values and the most predominant failure type in the three band cementing materials occurred at the cemento-enamel interface; however, the resin-modified glass ionomer showed a lower percentage.
Palavras-chave : dental cement; orthodontic bands; debonding.