Collagenous microstructure of the glenoid labrum and biceps anchor
| Autor: | C D Smith, K J Brook, T Ryder, Adam M. Hill, Jill Moss, Anthony M. J. Bull, Andrew L. Wallace, E J Hoerning |
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| Rok vydání: | 2008 |
| Předmět: |
Cartilage
Articular musculoskeletal diseases Histology Materials science Glenoid labrum Context (language use) Biceps Microscopy Electron Transmission Microscopy medicine Freeze Fracturing Humans GeneralLiterature_REFERENCE(e.g. dictionaries encyclopedias glossaries) Molecular Biology Ecology Evolution Behavior and Systematics Aged Aged 80 and over Labrum Microscopy Confocal Shoulder Joint Dissection Original Articles Cell Biology Anatomy Middle Aged Microstructure medicine.anatomical_structure Transmission electron microscopy Microscopy Electron Scanning Shoulder joint Collagen Joint Capsule Developmental Biology |
| Zdroj: | Journal of Anatomy. 212:853-862 |
| ISSN: | 1469-7580 0021-8782 |
| DOI: | 10.1111/j.1469-7580.2008.00904.x |
| Popis: | The glenoid labrum is a significant passive stabilizer of the shoulder joint. However, its microstructural form remains largely unappreciated, particularly in the context of its variety of functions. The focus of labral microscopy has often been histology and, as such, there is very little appreciation of collagen composition and arrangement of the labrum, and hence the micromechanics of the structure. On transmission electron microscopy, significant differences in diameter, area and perimeter were noted in the two gross histological groups of collagen fibril visualized; this suggests a heterogeneous collagenous composition with potentially distinct mechanical function. Scanning electron microscopy demonstrated three distinct zones of interest: a superficial mesh, a dense circumferential braided core potentially able to accommodate hoop stresses, and a loosely packed peri-core zone. Confocal microscopy revealed an articular surface fine fibrillar mesh potentially able to reduce surface friction, bundles of circumferential encapsulated fibres in the bulk of the tissue, and bone anchoring fibres at the osseous interface. Varying microstructure throughout the depth of the labrum suggests a role in accommodating different types of loading. An understanding of the labral microstructure can lead to development of hypotheses based upon an appreciation of this component of material property. This may aid an educated approach to surgical timing and repair. |
| Databáze: | OpenAIRE |
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