Chen, Xintong (2023). Detailed anatomy of the ventral and lateral part of the elbow joint capsule and its influence on the elbow stability. PhD thesis, Universität zu Köln.
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Abstract
Introduction: The stability of the elbow joint is maintained by the bones, joints, ligaments, and joint capsule that make up the articulation. As the joint between the shoulder and the wrist, maintaining stability in the elbow joint is important for the accomplishment of upper extremity functions. The role of bones, joints, and ligaments on the stability of the elbow joint is self-evident, but the influence of the joint capsule on the stability of the elbow joint is less well understood. In this thesis, based on the morphological and structural characteristics of the elbow joint capsule in applied anatomy, the role of the various parts of the elbow joint capsule in maintaining the stability of the elbow joint is studied from a biomechanical perspective. the aim is to provide an anatomical basis for the clinical understanding and treatment of acute and chronic elbow instability. Methods: Seven intact elbow cadavers with only capsular ligamentous coverings (no evidence of previous surgery or injury to these specimens) were recorded and biomechanically tested as follows. The changes in the surface of the elbow capsule during motion were recorded for each perspective in a specific angular range using a DIC device: -10 to 30° in the ventral part, 50 to 140° in the medial and lateral part. After we obtained all the displacement field maps, we found that the presence of special v shape is consistent with the hypothesis of previous scholars on the structure of the ventral joint capsule. We accordingly do a comparison of the displacement of the special v structure with that of the surrounding tissue in different axial dimensions. The resulting data were statistically analyzed using Wilson Signed Rank Test. Results and Conclusion: No significant difference was found in the contribution of the dorsal joint capsule to the stability of the elbow joint during flexion and extension. There were differences in the mechanical effects of various components of the ventral joint capsule during elbow flexion and extension, and we further investigated the contribution of a specific V-zone to elbow joint stability. Two bands within the ventral joint capsule comprising the V-zone could provide more stability in the vertical direction. We can perform further experimental verification in fresh frozen cadaveric specimen to demonstrate whether these two bands can be named as ligaments.
Item Type: | Thesis (PhD thesis) | ||||||||
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URN: | urn:nbn:de:hbz:38-711978 | ||||||||
Date: | 10 October 2023 | ||||||||
Language: | English | ||||||||
Faculty: | Faculty of Medicine | ||||||||
Divisions: | Faculty of Medicine > Orthopädie > Klinik und Poliklinik für Orthopädie und Unfallchirurgie | ||||||||
Subjects: | Medical sciences Medicine | ||||||||
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Date of oral exam: | 3 August 2023 | ||||||||
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Refereed: | Yes | ||||||||
URI: | http://kups.ub.uni-koeln.de/id/eprint/71197 |
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