SciELO - Scientific Electronic Library Online

vol.13 issue4Study of surface alterations of composite and ionomeric materials submitted to simulation of a high cariogenic challengeMorphology of dentin treated with desensitizing substances: scanning electron microscopy study author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand




Related links


Revista de Odontologia da Universidade de São Paulo

Print version ISSN 0103-0663


FRANCO, Eduardo Batista  and  BOTELHO, Adriana Maria. Tensile strength of metal crowns cemented on dental and buildup surfaces. Rev Odontol Univ São Paulo [online]. 1999, vol.13, n.4, pp.329-335. ISSN 0103-0663.

The purpose of this study was to evaluate the tensile strength of metal crowns cemented with Ketac-Cem (ESPE) glass ionomer cement, on teeth properly prepared with and without previous treatment of 40% polyacrylic acid, as well as on built-up teeth reconstructed with Vitremer (3M) ionomer cement. For comparison purposes, zinc phosphate cement (SS White) was also employed. Fifty upper pre-molar human teeth were selected, embedded in epoxy resin, and divided into 5 groups of 10 elements each. After cementing, the specimens were submitted to thermocycling at 5°C, 37°C and 55°C, and later subjected to tensile tests in a Universal Kratos testing machine. The results obtained were submitted to ANOVA, showing statistically significant differences (5%) between the distinct conditions studied. Regarding the teeth without reconstruction, we verified improved results of Ketac-Cem when using polyacrylic acid. The teeth reconstructed with Vitremer did not show significant statistical difference between the two cementing agents. The reconstruction of teeth buildup surfaces did not hinder the retentiveness of the metal crowns.

Keywords : Glass ionomer cements; Dental cements; Metallic crowns.

        · abstract in Portuguese     · text in Portuguese     · Portuguese ( pdf epdf )


Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License