Date: February 2020 (Online).
Source: International Journal of Oral and Maxillofacial Surgery.
Abstract: Three-dimensional stereophotogrammetry is commonly used to assess volumetric changes after facial procedures. A lack of clear landmarks in aesthetic regions complicates the reproduction of selected areas in sequential images. A three-dimensional volumetric analysis was developed based on a personalized aesthetic template. The accuracy and reproducibility of this method were assessed. Six female volunteers were photographed using the 3dMDtrio system according to a clinical protocol, twice at baseline (T1) and twice after 1 year (T2). A styrofoam head was used as control. A standardized aesthetic template was morphed over the baseline images of the volunteers using a coherent point drift algorithm. The resulting personalized template was projected over all sequential images to assess surface area differences, volume differences, and root mean square errors. In 12 well-defined aesthetic areas, mean average surface area and volume differences between the two T1 images ranged from −7.6 mm2 to 10.1 mm2 and −0.11 cm3 to 0.13 cm3, respectively. T1 root mean square errors ranged between 0.24 mm and 0.62 mm (standard deviation 0.18–0.73 mm). Comparable differences were found between the T2 images. An increase in volume between T1 and T2 was only observed for volunteers who gained in body weight. Personalized aesthetic templates are an accurate and reproducible method to assess changes in aesthetic areas.
Article: Three-dimensional facial volume analysis using algorithm-based personalized aesthetic templates.
Authors: A Jorien Tuin, Jene W Meulstee, Tom GJ Loonen, Joep Kraeima, Fred KL Spijkervet, Arjan Vissink, Johan Jansma, Rutger H Schepers. Department of Oral and Maxillofacial Surgery, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands.