Three dimensional evaluation of facial asymmetry after mandibular reconstruction: validation of a new method using stereophotogrammetry

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Title:	Three dimensional evaluation of facial asymmetry after mandibular reconstruction: validation of a new method using stereophotogrammetry
Author(s):	Verhoeven, T.J. ; Coppen, C. ; Barkhuysen, R. ; Bronkhorst, E.M. ; Merkx, M.A.W. ; Berge, S.J. ; Maal, T.J.J.
Publication year:	2013
Source:	International Journal of Oral and Maxillofacial Surgery, vol. 42, iss. 1, (2013), pp. 19-25
ISSN:	0901-5027
DOI:	https://doi.org/10.1016/j.ijom.2012.05.036
Publication type:	Article / Letter to editor
Please use this identifier to cite or link to this item : http://hdl.handle.net/2066/117863
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Subject:	NCEBP 2: Evaluation of complex medical interventions NCEBP 2: Evaluation of complex medical interventions ONCOL 3: Translational research NCEBP 7: Effective primary care and public health
Organization:	Oral and Maxillofacial Surgery Dentistry
Journal title:	International Journal of Oral and Maxillofacial Surgery
Volume:	vol. 42
Issue:	iss. 1
Page start:	p. 19
Page end:	p. 25
Abstract:	The scientific literature is sparse on reports that evaluate facial asymmetry after mandibular reconstructive surgery objectively. The aim of this study is to introduce and validate a new method, using three dimensional (3D) stereophotogrammetry, that quantifies soft-tissue facial asymmetry in patients who have undergone mandibular reconstruction. To validate the new method, two observers applied the method on 3D photographs of five patients and five controls. An inter-observer difference of 0.04 mm (-0.08 to 0.17) was found with a measurement error of 0.13 mm. 15 3D photographs of the mandibular reconstructed patients were compared with 24 3D photographs of healthy controls. A significant difference (1.19 mm) in asymmetry was found between patients and controls. It is concluded that this new measuring method is a valid, fast and clinically applicable technique to quantify soft-tissue facial asymmetry. It is concluded that facial symmetry in patients is not restored to the level of the control group with the mandibular reconstruction method applied.