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Dimensional accuracy of computer-aided design/computer-assisted manufactured orbital prostheses.
Int J Prosthodont. 2010 May-Jun; 23(3):271-6.IJ

Abstract

PURPOSE

The aim of this research was to assess the dimensional accuracy of orbital prostheses based on reversed images generated by computer-aided design/computer-assisted manufacturing (CAD/CAM) using computed tomography (CT) scans.

MATERIALS AND METHODS

CT scans of the faces of 15 adults, men and women older than 25 years of age not bearing any congenital or acquired craniofacial defects, were processed using CAD software to produce 30 reversed three-dimensional models of the orbital region. These models were then processed using the CAM system by means of selective laser sintering to generate surface prototypes of the volunteers' orbital regions. Two moulage impressions of the faces of each volunteer were taken to manufacture 15 pairs of casts. Orbital defects were created on the right or left side of each cast. The surface prototypes were adapted to the casts and then flasked to fabricate silicone prostheses. The establishment of anthropometric landmarks on the orbital region and facial midline allowed for the data collection of 31 linear measurements, used to assess the dimensional accuracy of the orbital prostheses and their location on the face.

RESULTS

The comparative analyses of the linear measurements taken from the orbital prostheses and the opposite sides that originated the surface prototypes demonstrated that the orbital prostheses presented similar vertical, transversal, and oblique dimensions, as well as similar depth. There was no transverse or oblique displacement of the prostheses.

CONCLUSION

From a clinical perspective, the small differences observed after analyzing all 31 linear measurements did not indicate facial asymmetry. The dimensional accuracy of the orbital prostheses suggested that the CAD/CAM system assessed herein may be applicable for clinical purposes.

Authors+Show Affiliations

Department of Maxillofacial Surgery, Prosthesis and Traumatology, School of Dentistry, University of São Paulo, Brazil.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article

Language

eng

PubMed ID

20552095

Citation

Marafon, Priscila Galzo, et al. "Dimensional Accuracy of Computer-aided Design/computer-assisted Manufactured Orbital Prostheses." The International Journal of Prosthodontics, vol. 23, no. 3, 2010, pp. 271-6.
Marafon PG, Mattos BS, Sabóia AC, et al. Dimensional accuracy of computer-aided design/computer-assisted manufactured orbital prostheses. Int J Prosthodont. 2010;23(3):271-6.
Marafon, P. G., Mattos, B. S., Sabóia, A. C., & Noritomi, P. Y. (2010). Dimensional accuracy of computer-aided design/computer-assisted manufactured orbital prostheses. The International Journal of Prosthodontics, 23(3), 271-6.
Marafon PG, et al. Dimensional Accuracy of Computer-aided Design/computer-assisted Manufactured Orbital Prostheses. Int J Prosthodont. 2010 May-Jun;23(3):271-6. PubMed PMID: 20552095.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Dimensional accuracy of computer-aided design/computer-assisted manufactured orbital prostheses. AU - Marafon,Priscila Galzo, AU - Mattos,Beatriz Silva Câmara, AU - Sabóia,Antonio Carlos Lorenz, AU - Noritomi,Pedro Yoshito, PY - 2010/6/17/entrez PY - 2010/6/17/pubmed PY - 2010/8/19/medline SP - 271 EP - 6 JF - The International journal of prosthodontics JO - Int J Prosthodont VL - 23 IS - 3 N2 - PURPOSE: The aim of this research was to assess the dimensional accuracy of orbital prostheses based on reversed images generated by computer-aided design/computer-assisted manufacturing (CAD/CAM) using computed tomography (CT) scans. MATERIALS AND METHODS: CT scans of the faces of 15 adults, men and women older than 25 years of age not bearing any congenital or acquired craniofacial defects, were processed using CAD software to produce 30 reversed three-dimensional models of the orbital region. These models were then processed using the CAM system by means of selective laser sintering to generate surface prototypes of the volunteers' orbital regions. Two moulage impressions of the faces of each volunteer were taken to manufacture 15 pairs of casts. Orbital defects were created on the right or left side of each cast. The surface prototypes were adapted to the casts and then flasked to fabricate silicone prostheses. The establishment of anthropometric landmarks on the orbital region and facial midline allowed for the data collection of 31 linear measurements, used to assess the dimensional accuracy of the orbital prostheses and their location on the face. RESULTS: The comparative analyses of the linear measurements taken from the orbital prostheses and the opposite sides that originated the surface prototypes demonstrated that the orbital prostheses presented similar vertical, transversal, and oblique dimensions, as well as similar depth. There was no transverse or oblique displacement of the prostheses. CONCLUSION: From a clinical perspective, the small differences observed after analyzing all 31 linear measurements did not indicate facial asymmetry. The dimensional accuracy of the orbital prostheses suggested that the CAD/CAM system assessed herein may be applicable for clinical purposes. SN - 0893-2174 UR - https://www.unboundmedicine.com/medline/citation/20552095/Dimensional_accuracy_of_computer_aided_design/computer_assisted_manufactured_orbital_prostheses_ DB - PRIME DP - Unbound Medicine ER -