Estabilidade dimensional em prótese óculo-palpebral confeccionada por meio de modelo reverso obtido pelo sistema CAD/CAM / Dimensional stability in orbital prosthesis produced by means of reverse prototype generated by CAD/CAM system

AUTOR(ES)
DATA DE PUBLICAÇÃO

2008

RESUMO

The CAD/CAM technology available in the biomedical area gave rise to the development of this study in order to evaluate the dimensional stability of orbital prosthesis. Face computerized tomography of 15 adults, men and women older than 25 years of age not bearing congenital or acquired craniofacial defect, were processed in CAD (computer-aided design) software to produce 30 reverse tridimensional models of the orbital region. These models were then processed in the CAM system (computer-aided manufacturing), by means of laser selective sintering, to generate surface prototypes of the orbital region. Two facial impressions of each subject provided 15 pairs of cast models and orbital defects were performed either in the right or left side of each stone model. The surface prototypes were adapted in the casts and then flasked to be processed in silicone. The demarcation of anthropometric landmarks within the prosthesis and in the face midline defined 31 linear measurements, used to evaluate the dimensional stability of the orbital prostheses and its location in the face. In conclusion, the comparative analyses of the measurements, observed in the prostheses and in the opposite sides that originated the surface prototypes, showed that silicone orbital prostheses presented similar vertical, transversal and oblique dimensions, as well as similar depth. There is no transverse or oblique displacement of the prostheses. Combined measurements in the prosthesesside are not stable regarding the opposite side. The dimensional stability of orbital prostheses suggests that the CAD/CAM system evaluated herein may be used with clinical purposes.

ASSUNTO(S)

linear mensurements pontos antropométricos sistema cad/cam prototype cad/cam system orbital prosthesis medidas lineares protótipo antropometric landmarks prótese facial

ACESSO AO ARTIGO

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