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Knee Surgery, Sports Traumatology, Arthroscopy

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01.10.2011 | Shoulder

MRI assessment of the structural labrum integrity after Bankart repair using knotless bio-anchors

verfasst von: T. Stein, A. P. Mehling, C. Reck, J. Buckup, T. Efe, R. Hoffmann, A. Jäger, F. Welsch

Erschienen in: Knee Surgery, Sports Traumatology, Arthroscopy | Ausgabe 10/2011

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Abstract

Purpose

Adequate labral restorations after Bankart repair have been demonstrated in cadaver models for knot-tying and knotless anchors and in vivo by magnetic resonance imaging for knot tying. The influence of glenoidal bio-degradation on clinical outcome, and conclusions regarding drill hole enlargement and foreign body reactions remain controversial.

Methods

The labrum was analyzed in magnetic resonance images for 37 consecutive patients with Bankart repair using knotless PLLA anchors and for 31 volunteers as radiologic controls. The labrum was assessed regarding slope, height index (quotient between labral height to the glenoid height), and labrum morphology in axial and coronal T2 images. Glenoidal bio-degradation was graded in terms of the drill hole configuration in T1 images and the corresponding osseous reaction in T2 images. Constant-Murley, Walch-Duplay, and Rowe scoring were carried out preoperatively and at follow-up.

Results

At 15 months after arthroscopy, the anterior slope (24.8°), height index (3.0), inferior slope (25.4°), and height index (2.5) were not significantly different from control values. Morphologic analysis revealed significant changes in the Bankart group (P < 0.05) that were influenced by the number of preoperative dislocations. Bio-degradation proceeded slowly with no evidence of drill hole enlargement. Osseous reactions were significantly greater in inferior compared to superior implants. The clinical scores were excellent and were not influenced by bio-degradation.

Conclusions

Knotless anchors facilitate labral restoration that is comparable to the knot-tying approach. Bio-degradation proceeds slowly without clinical or radiologic evidence of foreign body reactions.

Level of evidence

III.

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Titel: MRI assessment of the structural labrum integrity after Bankart repair using knotless bio-anchors
verfasst von: T. Stein
A. P. Mehling
C. Reck
J. Buckup
T. Efe
R. Hoffmann
A. Jäger
F. Welsch
Publikationsdatum: 01.10.2011
Verlag: Springer-Verlag
Erschienen in: Knee Surgery, Sports Traumatology, Arthroscopy / Ausgabe 10/2011
Print ISSN: 0942-2056
Elektronische ISSN: 1433-7347
DOI: https://doi.org/10.1007/s00167-011-1407-2

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MRI assessment of the structural labrum integrity after Bankart repair using knotless bio-anchors

Abstract

Purpose

Methods

Results

Conclusions

Level of evidence

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Springer Medizin

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Purpose

Methods

Results

Conclusions

Level of evidence

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