Carta
Evaluation of the Shore A Hardness of Silicone for Facial Prosthesis as to the Effect of Storage Period and Chemical Disinfection
Fecha
2010-03-01Registro en:
Journal of Craniofacial Surgery. Philadelphia: Lippincott Williams & Wilkins, v. 21, n. 2, p. 323-327, 2010.
1049-2275
10.1097/SCS.0b013e3181cf5fa4
WOS:000276073200008
9719883814872582
0000-0002-3800-3050
Autor
Fac Integradas Santa Fe do Sul
Universidade Estadual Paulista (Unesp)
Resumen
The failure of facial prostheses is caused by limitations in the properties of existing materials, especially flexibility and durability. Therefore, this study evaluated the Shore A hardness of silicone used for fabrication of facial prostheses, Silastic MDX4-4210, according to the influence of storage period, daily disinfection, and 2 types of pigmentation. Thirty specimens were fabricated and divided in 3 groups: colorless, pigmented with makeup, and pigmented with iron oxide. Analysis of results was assessed on a Shore A hardness meter immediately, 6 months, and 1 year after fabrication of specimens, following the guidelines of the American Society for Testing and Materials. The hardness values were statistically analyzed by the Tukey test. The silicone exhibited an increase in hardness with time. However, the hardness was stable from 6 months to 1 year. It was concluded that the silicone is within the values of Shore A hardness reported in the literature, regardless of the storage period, pigmentation, and chemical disinfection.