Abstract
In the modern anthropometry of complex structures, such as the face, different technical
approaches for acquisition of three-dimensional data have become increasingly more
common. Results of meticulous evaluations have shown high degrees of precision and
accuracy under both ideal and clinical circumstances. However, the question remains
as to which level of accuracy is adequate to meet clinical needs. Apart from the measuring
technique itself, potential sources of error must be identified and dealt with. Subjects’
involuntary facial movements can potentially influence clinical reliability. The 3dMDface™
system was used clinically to investigate the influence of involuntary facial movements.
Other factors of influence were systematically excluded. The mean technical error
of the system (0.09 mm) was investigated in a previous study and taken into account for interpretation
of the data. The handling of the system was straightforward for both acquisition and
analysis of data. Including technical error and the influence of involuntary facial
movements, the mean global error was 0.41 mm (range 0–3.3). Taking into account the technical error of the system known from
the previous study, involuntary facial movements account for a mean error of 0.32 mm. This range of involuntary facial movements clearly exceeds the known technical
error of the three-dimensional photographic system used. Given this finding, future
research should shift its focus from the analysis of the technical aspects of such
systems to other influential factors.
Keywords
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Article info
Publication history
Published online: January 18, 2011
Accepted:
December 10,
2010
Identification
Copyright
© 2010 The British Association of Oral and Maxillofacial Surgeons. Published by Elsevier Inc. All rights reserved.
