TOLEDO, Fabiane Lopes et al. Cimentation of crowns with fosfat of zinc on abutments of titanium alloy, radiated or not for laser. Innov. Implant. J., Biomater. Esthet. (Online) []. 2010, 5, 2, pp. 35-39. ISSN 1984-5960.

By means of tensile strength, NiCr total crowns were removed from machine-made conical abutments composed by an Ti-6Al-4V alloy. In a total of 20 abutments, 10 were used with it surface presenting high smoothness and 10 abutments had its surfaces modified by laser both cemented with zinc phosphate. The mechanical test was performed at a MTS 810 universal machine adjusted to a speed of 0.5 mm/m. The statistical analysis was done by Levene's test, which showed homogeneity of variances among groups (F =2.21; p < 0.1). "Student t test" showed that significant differences were found between groups. The modification of the abutment surface through laser caused an increase in pull-out resistance of crowns cemented with zinc phosphate from 430.66 N to 1.514,87 N.

: Dental implants; Cementation; Tensile strength.