Alterações cromáticas de silicones utilizados na confecção de próteses faciais após envelhecimento / Chromatic alterations in silicons used for facial prosthesis after aging

AUTOR(ES)

Ricardo Henrique Cardim

DATA DE PUBLICAÇÃO

2007

RESUMO

Owing to the fact that pigmented silicons used in the making of facial prosthesis or the rehabilitation of patients with facial flaws present , in clinical experience, chromatic alteration as time passes by, and due to the shortage of experimental papers in the specific literature, specially in relation to industrial silicon of acetic cure, the present paper targets to verify the behavior of three types of different silicons colored with a determined pigment (facial make up powder), used as routine in facial prosthesis. The used silicons were: one of cure by heat (HTV) with medical purposes , one of acetic cure (RTV) for industrial purposes with specific nutritious rules and another one of acetic cure (RTV) with industrial rules only. To perform the experiment thirty bodies of proof were made , ten to each silicon type, which were analyzed through spectrophotometer. After analyzing, each group was divided into two sub groups, five units each, one group exposed (E) and one group control (C). The three groups (E) passed through accelerated environmental exposure aging, while the three groups (C) stayed in a totally dark place at normal temperature. The initial reading was considered pattern, while the following readings were within 45 and 90 days. The data from the three measurements were used for evaluating the chromatic alterations. With the statistic results at hand, we came to the conclusion that all silicons exposed showed unacceptable clinical color alteration, and in the control groups only the industrial acetic cure silicon (RTV) with specific nutritious rules, showed acceptable clinical chromatic changes while the other two remained stable.

ASSUNTO(S)

silicone espectrofotometria color change spectrophotometry silicone material maxillo facial prosthesis alteração cromática prótese facial

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