Assessment of initial and the permanent deformation of two silicones (Silved Selant and Brascoved) for facial prostheses under the pigmentation and chemical disinfection influence
Keywords:
Maxillofacial prosthesis, initial deformation, permanent deformationAbstract
The purpose of present study was to analyze the effect of pigmentation andchemical disinfection on the initial and the permanent deformation of two silicones
(Silved Selant and Brascoved) for facial prosthesis. Initial and permanent
deformation tests samples (20 mm × 12.5 mm) were made following the
manufacturer's instructions. For each silicone (n= 40), ten samples were used for
pigmentation with make up power, ten with iron oxide, ten with ceramics power
and tem were tested without pigmentation. Five samples of each group were
submitted to chemical disinfection using a 2 % Chlorhexidine spray. All samples
were immersed in physiological saline and stored in an oven at 35 º ± 1 ºC. After
90 days, the samples were submitted to initial and permanent deformation tests
using a dial indicator. For both properties, data were analyzed by Tukey's test (α=
0.05). The results showed that all the materials had initial and permanent
deformation regardless of pigmentation and chemical disinfection. The groups were
used for pigmentation with iron oxide showed less initial and permanent
deformation when were submitted to the chemical disinfection regardless the
silicone used.
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