universidade de são paulo - Faculdade de Odontologia - Unesp

68
adherent yeast cells (crystal violet staining assay) among the experimental
conditions were evaluated by two-way measure analysis of variance. Data of yeast
counts (cells per mm 2 ) were transformed by log. A significance level of 0.01 was
used for all statistical tests.
Results
Roughness values of all groups evaluated are presented in Table 1. For all
groups, the mean roughness values of the specimens processed against glass were
lower than those of the specimens processed against stone. There were no
significant differences among the groups in each investing technique.
Table 2 shows the means and standard deviations of contact angle and the
results of Tukey post hoc tests. It can be observed that there was significant
change in the mean contact angle after 48 hours of immersion in water for all
groups, with the exception of the control group, in which no significant difference
was found. In ArO 2 /70 W and ArSF 6 /70 W groups, there was significant
difference between the mean contact angle of smooth and roughened surfaces, in
the 48-hour period. XPS analysis demonstrated the incorporation of fluorine into
the surface of the specimens of the ArSF 6 /70 group (Fig. 1).
Candida albicans adherence, as determined by crystal violet staining assay
is shown in Fig. 2. Experimental and control groups did not differ from each other
(p