Measurements of three-dimensional glenoid erosion when planning the prosthetic replacement of osteoarthritic shoulders

Terrier, Alexandre; Ston, J; Larrea, Xabier; Farron, Alain

doi:10.1302/0301-620x.96b4.32641

Cited by 49 publications

(48 citation statements)

References 36 publications

(48 reference statements)

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“…Measurements were performed on standardized sagittaloblique CT slices precisely reconstructed from original CT data sets using specific anatomical landmarks. This reconstruction plane is biomechanically relevant because it is perpendicular to the scapular axis, which can be seen as the major axis of the action line of rotator cuff muscles [11,12]. In addition, it corresponds to the widely-used plane with the typical Y-shape of the scapula, albeit with the advantage of not being subject to inter-and intra-observer variability when determined alternately by radiologists or surgeons.…”

Section: Discussionmentioning

confidence: 99%

“…The scapular axis was fitted along the supraspinatus groove and within the scapular plane. The scapular plane was fitted along the supraspinatus groove and the lateral border of the scapula [11,12]. On this CT slice, a musculoskeletal radiologist delineated the presumed crosssectional area (S) of the normal supraspinatus (SS), subscapularis (SC), infraspinatus (IS), and teres minor (TM) muscles.…”

Section: Methodsmentioning

confidence: 99%

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A semi-automated quantitative CT method for measuring rotator cuff muscle degeneration in shoulders with primary osteoarthritis

Terrier¹,

Ston²,

Dewarrat³

et al. 2017

Orthopaedics & Traumatology: Surgery & Research

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a b s t r a c tBackground: Rotator cuff muscle degeneration is an important parameter to consider when planning shoulder arthroplasty. Hypothesis: We hypothesized that rotator cuff muscle degeneration is correlated with scapulohumeral subluxation in patients planned for anatomical total shoulder arthroplasty (TSA). Materials and methods: We developed a semi-automated quantitative CT method to measure rotator cuff muscle degeneration, and retrospectively analyzed 107 preoperative shoulder CT scans of patients with primary osteoarthritis. On a standardized sagittal-oblique CT slice perpendicular to the scapular axis, two observers measured the cross-sectional areas of residual rotator cuff muscle tissues, normalized by the estimated area of healthy muscles. Muscle degeneration was quantified in a semi-automated manner, and divided into atrophy and fatty infiltration. Scapulohumeral subluxation was determined in 3D as the distance between the humeral head center and the glenoid surface center, projected on the same CT slice, and normalized by the humeral head radius. We tested all potential correlations between muscle degeneration and scapulohumeral subluxation. Results: Muscle degeneration, primarily due to atrophy, predominated in the supraspinatus; it varied from 0.8% to 88.8%. Scapulohumeral subluxation varied from 2.5% to 72.9%, and was mainly in a posterior and postero-superior orientation. There was a significant but weak correlation between the amount of subluxation and both supraspinatus (R = 0.207, P = 0.032) and infraspinatus (R = 0.225, P = 0.020) degeneration. Inter-and intra-observer reproducibility of muscle degeneration measurements were both excellent respectively). Conclusion: This new semi-automated CT method allows to quantitatively and reproducibly measure rotator cuff muscle degeneration in shoulders with primary osteoarthritis. Muscle degeneration is weakly correlated with scapulohumeral subluxation in patients planned for anatomical TSA. Level of evidence: Level IV. Type of study: Diagnostic retrospective study.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

A semi-automated quantitative CT method for measuring rotator cuff muscle degeneration in shoulders with primary osteoarthritis

Terrier¹,

Ston²,

Dewarrat³

et al. 2017

Orthopaedics & Traumatology: Surgery & Research

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“…These anatomic quantities were defined from bone landmarks that were placed on a 3D reconstruction of the scapula and the humerus. 14 The scapular plane was fitted on 5 points along the supraspinatus fossa and on 5 points along the axillary border. The scapular axis was fitted on the same 5 points of the supraspinatus fossa, projected onto the scapular plane.…”

Section: D Analysis and Bone Landmarksmentioning

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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“…The glenoid version after TSA was 5.5° with the STD, 4° with STD-OC, 4.8° with PAG, and 3.3° with PAG-OC. These angles were measured in 3D in the scapular coordinate system (Terrier et al 2014). …”

Section: Overcorrected Implant Designmentioning

confidence: 99%

Overcorrected glenoid implants to prevent recurrent glenohumeral subluxation after total shoulder arthroplasty: a patient-specific finite element analysis

Boulanaache

Bergamin

Becce

et al. 2017

Computer Methods in Biomechanics and Biomedical Engineering

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Measurements of three-dimensional glenoid erosion when planning the prosthetic replacement of osteoarthritic shoulders

Cited by 49 publications

References 36 publications

A semi-automated quantitative CT method for measuring rotator cuff muscle degeneration in shoulders with primary osteoarthritis

A semi-automated quantitative CT method for measuring rotator cuff muscle degeneration in shoulders with primary osteoarthritis

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

Overcorrected glenoid implants to prevent recurrent glenohumeral subluxation after total shoulder arthroplasty: a patient-specific finite element analysis

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