Distinct Proximal Humeral Geometry in Chinese Population and Clinical Relevance
| Autor: | Jianhua Wang, Krishna C. Ravella, Shaobai Wang, Lewis L. Shi, Qiang Zhang, Cailong Liu, Jason L. Koh, Guoan Li |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Adult
Models Anatomic China Adolescent medicine.medical_treatment Population Geometry Radius of curvature (optics) Young Adult 03 medical and health sciences Imaging Three-Dimensional 0302 clinical medicine Asian People medicine Humans Orthopedics and Sports Medicine Humerus Arthrography education 030222 orthopedics education.field_of_study Shoulder Joint business.industry 030229 sport sciences General Medicine Radius Middle Aged Arthroplasty Transverse plane medicine.anatomical_structure Coronal plane Surgery Tomography Tomography X-Ray Computed business |
| Zdroj: | Journal of Bone and Joint Surgery. 98:2071-2081 |
| ISSN: | 1535-1386 0021-9355 |
| DOI: | 10.2106/jbjs.15.01232 |
| Popis: | Background: Replicating humeral anatomy during shoulder arthroplasty is important for good patient outcomes. The proximal humeral geometry of the Chinese population has been rarely reported. We analyzed the geometry of the proximal part of the humerus in Chinese subjects and compared it with that of Western populations and the dimensions of available prostheses. Methods: Eighty healthy Chinese subjects underwent computed tomography (CT)-arthrography. Three-dimensional (3D) digital humeral and glenoid models were reconstructed, and geometric parameters were measured. Humeral measurements included the radius of curvature, articular surface diameter and thickness, anterior-posterior/superior-inferior (AP/SI) articular surface diameter ratio, articular surface thickness/radius of curvature ratio, surface arc, inclination angle, retroversion angle, and medial and posterior offsets. Glenoid measurements included SI length, AP length, SI radius, and AP radius. Results: The average radius of curvature (and standard deviation) of the humeral head was 22.1 ± 1.9 mm, the articular surface diameter averaged 42.9 ± 3.6 mm, and the articular surface thickness averaged 16.9 ± 1.5 mm. There was strong linear correlation between the articular surface diameter and thickness (r2 = 0.696, p = 0.001), with a linear regression relationship of thickness = 0.357 × diameter + 1.615. The AP/SI articular surface diameter ratio averaged 0.93 ± 0.03; the articular surface thickness/radius of curvature ratio, 0.77 ± 0.05; the surface arc, 153° ± 5.6°; the inclination angle, 133° ± 3.1°; and the retroversion angle, 22.6° ± 10.2°. The medial and posterior offsets averaged 6.3 ± 0.9 mm and 0.4 ± 0.78 mm, respectively; the SI and AP lengths, 30.15 ± 3.70 mm and 20.35 ± 2.56 mm; and the SI and AP radii, 23.49 ± 2.48 mm and 25.54 ± 3.07 mm. Compared with the Western population, the Chinese cohort had a smaller radius of curvature (p < 0.001), smaller articular surface diameter (p = 0.009), larger articular surface thickness/radius of curvature ratio (p < 0.001), larger surface arc (p < 0.001), smaller inclination angle (p < 0.001), and smaller posterior offset (p < 0.001). Unlike the Western population, the Chinese population had higher glenohumeral conformity in the coronal plane than in the axial plane. Many manufacturers’ shoulder prostheses do not adequately cover the range of humeral head dimensions in our Chinese cohort. Conclusions: The geometric parameters of the humeri in the Chinese population differ from those in other populations. These differences have clinical relevance with regard to implant design and arthroplasty technique and likely affect clinical outcomes. |
| Databáze: | OpenAIRE |
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