In vitro evaluation of the effect of hydrofluoric acid concentration and application time on adhesion to lithium disilicate

Authors

  • Carlos Caparroso-Pérez University of Antioquia
  • Federico Latorre-Correa University of Antioquia
  • Luz Janeth Arroyave-Hoyos University of Antioquia
  • Carlos Andrés Grajales-Gaviria University of Antioquia
  • Verónica María Medina-Piedrahita University of Antioquia

Keywords:

Ceramics, Dental porcelain, Lithium disilicate, Hydrofluoric acid

Abstract


Introduction: as a ceramic restorative material, lithium disilicate provides higher resistance to ceramic materials, excellent optical characteristics, and the ability to be bonded to tooth substrate by hydrofluoric acid etching. The purpose of this study was to perform in vitro assessment of the effect of 4.6 and 9.5% hydrofluoric acid at 20, 40 and 60 s on the surface of lithium disilicate during the processes of adherence to a resinous substrate. Methods: 6 IPS e-max® Press porcelain cubes and 6 Filtek Z250® resin cubes were made. The ceramic cubes were subjected to surface treatment obtaining 6 groups: control group and groups 2 and 3 were treated with 4.6% hydrofluoric acid during 20, 40 and 60 seconds respectively, and groups 4, 5 and 6 were treated with 9.5% hydrofluoric acid at 20, 40 and 60 s respectively. Porcelain cubes were cemented with the resin ones with self-adhesive resin cement and bars of 1 x 1 x 18 mm were produced, obtaining 20 samples in each group. Adhesive strength was measured. Results: adhesive strength values expressed in MPa (SD) were as follows: G1 = 26.69 (± 7.99), G2 = 23.93 (± 7.99), G3 = 20.90 (± 7.91), G4 = 17.56 (± 6.61), G5 = 16.30 (± 11.68), G6 = 18.78 (± 10.22), with significant differences between group 1 and groups 4-5. Conclusions: 4.6% hydrofluoric acid produced better adhesive averages compared with the 9.6% concentrations. The group with 4.6% concentration during 20 s offered the best results.

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Author Biographies

Carlos Caparroso-Pérez, University of Antioquia

Dentist, Specialist in Comprehensive Dentistry of Adults, Magister in Higher Education, Associate Professor, School of Dentistry, Universi-dad de Antioqui

Federico Latorre-Correa, University of Antioquia

Dentist, Specialist in Comprehensive Dentistry of Adults, Magister in Higher Education, Associate Professor, School of Dentistry, Universidad de Antioquia.

Luz Janeth Arroyave-Hoyos, University of Antioquia

Graduate students, Comprehensive Dentistry of Adults with a focus on Prosthodontics. School of Dentistry, Universidad de Antioquia

 

Carlos Andrés Grajales-Gaviria, University of Antioquia

Graduate students, Comprehensive Dentistry of Adults with a focus on Prosthodontics. School of Dentistry, Universidad de Antioquia

Verónica María Medina-Piedrahita, University of Antioquia

Graduate students, Comprehensive Dentistry of Adults with a focus on Prosthodontics. School of Dentistry, Universidad de Antioquia

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Published

2014-07-14

How to Cite

Caparroso-Pérez, C., Latorre-Correa, F., Arroyave-Hoyos, L. J., Grajales-Gaviria, C. A., & Medina-Piedrahita, V. M. (2014). In vitro evaluation of the effect of hydrofluoric acid concentration and application time on adhesion to lithium disilicate. Revista Facultad De Odontología Universidad De Antioquia, 26(1), 62–75. Retrieved from https://revistas.udea.edu.co/index.php/odont/article/view/14272

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