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Knee Surgery, Sports Traumatology, Arthroscopy

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01.02.2016 | Shoulder

Effect of glenohumeral position on contact pressure between the capsulolabral complex and the glenoid in free ALPSA and Bankart lesions

verfasst von: DooSup Kim, HoeJeong Chung, Chang-Ho Yi, Yeo-Seung Yoon, Jongsang Son, Youngho Kim, Myoung-Gi On, JaeHyung Yang

Erschienen in: Knee Surgery, Sports Traumatology, Arthroscopy | Ausgabe 2/2016

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Abstract

Purpose

Anterior shoulder dislocation is a common injury, but the optimal management of dislocation remains controversial. We hypothesized that reducing the shoulder in externally rotated position would aid the reduction in capsulolabral lesions. Thus, in this study, contact pressure between the capsulolabral lesion and the glenoid in free ALPSA and Bankart lesions was measured using a cadaver model.

Methods

In 10 specimens, the humerus was externally rotated by abduction on the coronal plane to measure the contact pressure between the capsulolabral complex and glenoid in free ALPSA and Bankart lesions using a Tekscan pressure system. Stability of the joint was confirmed using the Vicon motion analysis system.

Results

In the normal shoulder joint, the peak pressure between the subscapularis muscle and the anterior capsule according to the location of the glenohumeral joint decreased to 83.4 ± 21.2 kPa in the 0° abduction and −30° external rotation positions and showed a 300.7 ± 42.9 kPa peak value in the 60° abduction and 60° external rotation positions. In both free ALPSA and Bankart lesions, the lowest pressure between the labral lesion and the glenoid was measured at 0° abduction and −30° external rotation, and the highest pressure was recorded at 60° external rotation and 60° abduction.

Conclusion

The contact pressure between the capsulolabral complex and the glenoid significantly increased when the abduction and external rotation angles were increased. Based on our results, the conservative management in free ALPSA lesions would respond better than Bankart lesions.

IRB or ethical committee approval

YWMR-12-0-038.

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Titel: Effect of glenohumeral position on contact pressure between the capsulolabral complex and the glenoid in free ALPSA and Bankart lesions
verfasst von: DooSup Kim
HoeJeong Chung
Chang-Ho Yi
Yeo-Seung Yoon
Jongsang Son
Youngho Kim
Myoung-Gi On
JaeHyung Yang
Publikationsdatum: 01.02.2016
Verlag: Springer Berlin Heidelberg
Erschienen in: Knee Surgery, Sports Traumatology, Arthroscopy / Ausgabe 2/2016
Print ISSN: 0942-2056
Elektronische ISSN: 1433-7347
DOI: https://doi.org/10.1007/s00167-015-3962-4

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Abstract

Purpose

Methods

Results

Conclusion

IRB or ethical committee approval

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