Computer algorithms for three-dimensional measurement of humeral anatomy: analysis of 140 paired humeri
| Autor: | Gábor Székely, Orcun Goksel, Matthias Graf, Celestine Dünner, Lazaros Vlachopoulos, Christian Gerber, Philipp Fürnstahl, Tobias Gass |
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| Rok vydání: | 2016 |
| Předmět: |
Adult
Male Reconstructive surgery medicine.medical_specialty 3d model Computed tomographic Young Adult 03 medical and health sciences Imaging Three-Dimensional 0302 clinical medicine Cadaver Inclination angle medicine Humans Orthopedics and Sports Medicine Humerus Aged Aged 80 and over 030222 orthopedics Preoperative planning business.industry 030229 sport sciences General Medicine Anatomy Middle Aged Three dimensional measurement medicine.anatomical_structure Female Surgery Tomography X-Ray Computed business Algorithm Algorithms |
| Zdroj: | Journal of Shoulder and Elbow Surgery. 25:e38-e48 |
| ISSN: | 1058-2746 |
| Popis: | Background In the presence of severe osteoarthritis, osteonecrosis, or proximal humeral fracture, the contralateral humerus may serve as a template for the 3-dimensional (3D) preoperative planning of reconstructive surgery. The purpose of this study was to develop algorithms for performing 3D measurements of the humeral anatomy and further to assess side-to-side (bilateral) differences in humeral head retrotorsion, humeral head inclination, humeral length, and humeral head radius and height. Methods The 3D models of 140 paired humeri (70 cadavers) were extracted from computed tomographic data. Geometric characteristics quantifying the humeral anatomy in 3D were determined in a semiautomatic fashion using the developed computer algorithms. The results between the sides were compared for evaluating bilateral differences. Results The mean bilateral difference of the humeral retrotorsion angle was 6.7° (standard deviation [SD], 5.7°; range, −15.1° to 24.0°; P = .063); the mean side difference of the humeral head inclination angle was 2.3° (SD, 1.8°; range, −5.1° to 8.4°; P = .12). The side difference in humeral length (mean, 2.9 mm; SD, 2.5 mm; range, −8.7 mm to 10.1 mm; P = .04) was significant. The mean side difference in the head sphere radius was 0.5 mm (SD, 0.6 mm; range, −3.2 mm to 2.2 mm; P = .76), and the mean side difference in humeral head height was 0.8 mm (SD, 0.6 mm; range, −2.4 mm to 2.4 mm; P = .44). Conclusions The contralateral anatomy may serve as a reliable reconstruction template for humeral length, humeral head radius, and humeral head height if it is analyzed with 3D algorithms. In contrast, determining humeral head retrotorsion and humeral head inclination from the contralateral anatomy may be more prone to error. |
| Databáze: | OpenAIRE |
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