Accuracy of the glenohumeral subluxation index in nonpathologic shoulders

Jacxsens, Matthijs; Tongel, Alexander Van; Willemot, Laurent; Müeller, Andreas; Valderrábano, Víctor; Wilde, Lieven De

doi:10.1016/j.jse.2014.07.021

Cited by 34 publications

(19 citation statements)

References 32 publications

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“…However, correlation coefficients were not high, as is often found during comparison of 2-dimensional and 3-dimensional measurements. 31 This discrepancy could be attributed to differences in orientation; the computed anatomical landmarks were not positioned in the exact same plane as 2-dimensional measurements, which are obtained 1 cm parallel to the tibiotalar joint.…”

Section: Discussionmentioning

confidence: 99%

Comparison of External Torque to Axial Loading in Detecting 3-Dimensional Displacement of Syndesmotic Ankle Injuries

et al. 2020

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Background: Current imaging techniques try to quantify 3-dimensional displacement of syndesmotic ankle injuries using 2-dimensional measurements, which may obscure an exact diagnosis. Therefore, our aim was to determine 3-dimensional displacement of syndesmotic ankle injuries under load and torque using a weightbearing computed tomography (WBCT) and to assess the relation with previously established 2-dimensional measurements. Methods: Seven paired cadaver specimens were mounted into a radiolucent frame. WBCT scans were obtained to generate 3-dimensional models after different patterns of axial load (0 kg, 85 kg) combined with external torque (0, 10 Nm). Sequential imaging was repeated in ankles containing intact syndesmotic ligaments, sectioning of the anterior inferior tibiofibular ligament (AITFL; condition 1A), deltoid ligament (DL; condition 1B), combined AITFL+DL (condition 2), and AITFl+DL+interosseous membrane (condition 3). Reference anatomical landmarks were established relative to the intact position of the fibula to quantify displacement. A subsequent correlation analysis was performed between the obtained 2- and 3-dimensional measurements. Results: Axial load increased lateral translation (mean = −0.9 mm, 95% confidence interval [CI]: 1.3, –0.1) significantly in condition 2 relative to the intact ankle ( P < .05) but did not demonstrate other significant displacements. External torque increased displacement significantly in all directions ( P < .05), except for dorsal translation of the fibula ( P > .05). The highest displacement could be detected when external torque was applied in condition 3 and consisted of posterior translation (mean = −3.1 mm; 95% CI: –4.8, –2.7) and external rotation (mean = −4.7 degrees; 95% CI: –5.6, –2.9). Pearson correlation coefficients between the 2-dimensional and 3-dimensional measurements were moderate and ranged from 0.31 to 0.56 ( P < .05). Conclusion: External torque demonstrated superiority over axial load in detecting syndesmotic ankle instability. Axial load increased lateral translation; however, differences were submillimeter in magnitude until torque was applied. A moderate correlation was found with previously established 2-dimensional measurements. Clinical Relevance: In clinical practice these findings substantiate application of external torque in current imaging modalities to improve detection of syndesmotic ankle injuries.

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Section: Discussionmentioning

confidence: 99%

Comparison of External Torque to Axial Loading in Detecting 3-Dimensional Displacement of Syndesmotic Ankle Injuries

et al. 2020

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“…During preprocessing, left scapulae were mirrored to a right and all 3D surfaces were aligned to a glenoid-based coordinate system (3-matic; Materialise, Leuven, Belgium) (Figure 1). 20 To focus the analysis on the periarticular anatomy of the scapula and concentrate placement of correspondence points on the region of interest, a cutting plane was defined through the scapular notch parallel to the best-fit circle of the inferior glenoid. A total of 2048 correspondence points were hierarchically placed on the region of interest and used to generate the mean shape of both groups.…”

Section: Statistical Shape Modelingmentioning

confidence: 99%

Coracoacromial morphology: a contributor to recurrent traumatic anterior glenohumeral instability?

Jacxsens

Elhabian

Brady

et al. 2019

Journal of Shoulder and Elbow Surgery

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Background: While scapular morphology contributes to glenohumeral osteoarthritis and rotator cuff disease, its role in traumatic glenohumeral instability remains unknown. We hypothesized that coracoacromial and glenoid morphology would differ between healthy subjects and those with recurrent traumatic anterior shoulder instability.Methods: Computed tomographic scans of 31 cadaveric control scapulae and 54 scapulae of patients with recurrent traumatic anterior shoulder instability and Hill-Sachs lesions were threedimensionally reconstructed. Statistical shape modelling identified the modes of variation between the scapulae of both groups. Corresponding measurements quantified these modes in relation to the glenoid center (linear offset measures), defined by the best-fit circle of the inferior glenoid, or glenoid center plane (angles), which bisects the glenoid longitudinally. Distances were normalized for glenoid size. Results:As compared to controls, the unstable coracoids were shorter (p=0.004), with a more superior and medial offset of the tip (mean difference [MD]: 7 and 3 mm, respectively; p<0.001), and an origin closer to the 12 o'clock position (MD: 6°; p<0.001). The unstable scapular spines

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“…Terrier et al reported that two-dimensional measures of retroversion underestimate three-dimensional measures by about 3° [47]. Jacxsens et al compared humeral subluxation on two-dimensional and three-dimensional imaging and determined that two-dimensional measurements underestimated posterior subluxation compared to three-dimensional measures by about 3 % [48]. Understanding these differences will be necessary when utilizing historical two-dimensional measurement data to guide planning using three-dimensional measurements.…”

Section: Computer Planning For Shoulder Arthroplastymentioning

confidence: 99%

Planning software and patient-specific instruments in shoulder arthroplasty

Wylie

Tashjian

2016

Curr Rev Musculoskelet Med

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Computer planning software and patient-specific instrumentation have been investigated in multiple subspecialties of orthopedics with mixed results. Shoulder arthroplasty has evolved over the last decade with improvements in implant design and surgical instrumentation. Despite these advances, glenoid positioning in shoulder arthroplasty continues to be a difficult problem. Recent advances in threedimensional imaging techniques and the use of computer planning software may potentially address some of the common difficulties encountered by surgeons. The addition of patient-specific instrumentation and guides provide an option for patients with significant glenoid deformity that may allow improved accuracy of glenoid component implantation compared to using standard instrumentation. Studies have reported improved positioning of the glenoid component in both anatomic and reverse total shoulder arthroplasty with patientspecific instrumentation and guides. More research is needed to determine whether these improvements lead to better patient-reported outcomes or implant survival. In addition, further studies will be needed to address whether this technology is cost effective for large-scale implementation in the orthopedic community.

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Accuracy of the glenohumeral subluxation index in nonpathologic shoulders

Cited by 34 publications

References 32 publications

Comparison of External Torque to Axial Loading in Detecting 3-Dimensional Displacement of Syndesmotic Ankle Injuries

Comparison of External Torque to Axial Loading in Detecting 3-Dimensional Displacement of Syndesmotic Ankle Injuries

Coracoacromial morphology: a contributor to recurrent traumatic anterior glenohumeral instability?

Planning software and patient-specific instruments in shoulder arthroplasty

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