Static posterior subluxation of the humeral head: An unrecognized entity responsible for glenohumeral osteoarthritis in the young adult

Walch, Gilles; Ascani, Claudio; Boulahia, Aziz; Nové-Josserand, Laurent; Edwards, T. Bradley

doi:10.1067/mse.2002.124547

Cited by 128 publications

(85 citation statements)

References 20 publications

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“…10,14,17,18,21,[29][30][31] However, to the best of our knowledge, no data have been reported of a large cohort of nonpathologic shoulders. In our results of a cohort of 151 nonpathologic shoulders, the mean HSI measured on a 2D axial CT scan slice was 48.7%.…”

Section: Figurementioning

confidence: 63%

Accuracy of the glenohumeral subluxation index in nonpathologic shoulders

Jacxsens¹,

Tongel²,

Willemot³

et al. 2015

Journal of Shoulder and Elbow Surgery

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Section: Figurementioning

confidence: 63%

Accuracy of the glenohumeral subluxation index in nonpathologic shoulders

Jacxsens¹,

Tongel²,

Willemot³

et al. 2015

Journal of Shoulder and Elbow Surgery

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“…This is a typical case in which the subluxation is underevaluated by the usual 2D glenohumeral measure. The scapulohumeral subluxation measured in 2D was 7% posterior, and the version measured in 2D was 15 posterior. However, the version measured in 3D was 22 and was oriented in the posteriorsuperior sector (50 ).…”

Section: Resultsmentioning

confidence: 99%

“…9,15 It is usually assumed that posterior subluxation of the humeral head can lead to posterior erosion of the glenoid. 10 Furthermore, there is a risk of recurrence of the subluxation after TSA that may be responsible for wear and early loosening of the glenoid component.…”

mentioning

confidence: 99%

Importance of a three-dimensional measure of humeral head subluxation in osteoarthritic shoulders

Terrier

Ston

Farron

2015

Journal of Shoulder and Elbow Surgery

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Hypothesis: During total shoulder arthroplasty (TSA), humeral head subluxation may be difficult to manage. Furthermore, there is a risk for postoperative recurrence of subluxation, affecting the outcome of TSA. An accurate evaluation of the subluxation is necessary to evaluate this risk. Currently, subluxation is measured in 2 dimensions (2D), usually relative to the glenoid face. The goal of this study was to extend this measure to 3 dimensions (3D) to compare glenohumeral and scapulohumeral subluxation and to evaluate the association of subluxation with the glenoid version. Materials and methods: The study analyzed 112 computed tomography scans of osteoarthritic shoulders. We extended the usual 2D definition of glenohumeral subluxation, scapulohumeral subluxation, and glenoid version by measuring their orientation in 3D relative to the scapular plane and the scapular axis. We evaluated statistical associations between subluxation and version in 2D and 3D. Results: Orientation of subluxation and version covered all sectors of the glenoid surface. Scapulohumeral subluxation and glenoid version were highly correlated in amplitude (R 2 ¼ 0.71; P < .01) and in orientation (R 2 ¼ 0.86; P < .01). Approximately every degree of glenoid version induced 1% of scapulohumeral subluxation in the same orientation of the version. Conversely, glenohumeral subluxation was not correlated to glenoid version in 2D or in 3D. Conclusions: Orientation of the humeral subluxation is rarely within the arbitrary computed tomography plane and should therefore be measured in 3D to detect out-of-plane subluxation. Scapulohumeral subluxation and glenoid version measured in 3D could bring valuable information for decision making during TSA.

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“…In recent years, primary glenoid dysplasia, associated with increased glenoid retroversion and sometimes with a static posterior subluxation, has also been evoked as a cause of shoulder osteoarthritis. 24,25 Among the other possible causes, the effects of muscular imbalance (eg, in association with neurologic problems) and the influence of the humeral side of the joint (especially retroversion of the humeral head) are less frequently reported.…”

mentioning

confidence: 99%