Precision of 3dMD in Anthropometry of the Auricle and its Application in Microtia Reconstruction, SH Mao, ZC Chen.

Date: September 17, 2015.
Source: 16th Congress of International Society of Craniofacial Surgery (ISCFS) 2015.
Presenter: Shih-Hsuan Mao.
Method: A total of 20 normal adult ears were included in this study. Thirteen anthropometric measurements were taken, twice by two plastic surgeons using Direct Measurement (DM) and through images captured via 3dMD. The purpose was to compare the reliability of measurements involving the two instruments.
Results: The overall Mean Absolute Differences (MAD) of all ear anthropometries of DM and 3dMD were 0.52mm (range 0.28-0.72mm) and 0.27mm (range 0.15-0.53mm) respectively; and the grand mean Relative Error Magnitudes (REM) were 2.85% (range 1.01%-5.99%) and 1.57% (range 0.48%-3.62%) respectively, across observers. This the precisions of all ear anthropometries across observers were high in both methods, but the precision of the 3dMD was better than DM irrespective of observers. In addition, the MADs were less than a millimeter across all measurements.
Conclusion: The application of 3D surface imaging in microtia surgery for both template production and soft tissue analysis leads to improved planning and satisfactory results with fewer complications. We believe that with further refinement and enhancement, the use of this innovation will pave the way for prefabricated, individualized autologous or biocompatible alloplastic implantable frameworks based on an accurate mirror image of each patient’s normal ear in unilateral cases and in bilateral cases, appropriately sized.

Article: Precision of 3dMD in Anthropometry of the Auricle and its Application in Microtia Reconstruction.
Authors: SH Mao, ZC Chen, Department of Plastic and Reconstructive Surgery, Chang Gung Memorial Hospital at Linkou, Chang Gung University, College of Medicine, Taiwan.

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