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Can the presence of SLAP-5 lesions be predicted by using the critical shoulder angle in traumatic anterior shoulder instability?
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Can the presence of SLAP-5 lesions be predicted by using the critical shoulder angle in traumatic anterior shoulder instability?
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Journal Article
Can the presence of SLAP-5 lesions be predicted by using the critical shoulder angle in traumatic anterior shoulder instability?
2025
Overview
Objective
Although SLAP-5 lesions are associated with recurrent dislocations, their causes and pathomechanisms have not been fully elucidated. This study aimed to investigate the association between SLAP-5 lesions and scapular morphology in traumatic anterior shoulder instability (ASI). We hypothesized that there may be a relationship between SLAP-5 lesions and scapular morphology in traumatic ASI patients.
Materials and methods
The study included 74 patients with isolated Bankart lesions and 69 with SLAP-5 lesions who underwent arthroscopic labral repair for ASI. Critical shoulder angle (CSA) was measured on the roentgenograms, while glenoid inclination (GI) and glenoid version (GV) were measured on magnetic resonance imaging (MRI) by two observers in two separate sessions blinded to each other. Both groups were compared in terms of CSA, GI, and GV.
Results
The mean ages of Bankart and SLAP-5 patients were 28.4±9.1 and 27.9±7.7 (
P
=0.89), respectively; their mean CSA values were 33.1°±2.6° and 28.2°±2.4°, respectively (
P
<0.001). The ROC analysis’s cut-off value was 30.5°, with 75.0% sensitivity and 76.7% specificity (AUC = 0.830). SLAP-5 lesions were more common on the dominant side than isolated Bankart lesions (
P
=0.021), but no difference was found between the groups in terms of GI and GV (
P
=0.334,
P
=0.081, respectively).
Conclusions
In ASI, low CSA values appeared to be related to SLAP-5 lesions, and the cut-off value of CSA for SLAP lesion formation was 30.5° with 75.0% sensitivity and 76.7% specificity. Scapula morphology may be related to the SLAP-5 lesions, and CSA can be used as an additional parameter in provocative diagnostic tests and medical imaging techniques for the detection of SLAP lesions accompanying Bankart lesions.
Level of Evidence
III retrospective case-control study
Publisher
Springer Berlin Heidelberg,Springer,Springer Nature B.V
Subject
/ Bankart Lesions - diagnostic imaging
/ Female
/ Humans
/ Imaging
/ Joint Instability - diagnostic imaging
/ Lesions
/ Magnetic Resonance Imaging - methods
/ Male
/ Medicine
/ Scapula
/ Scapula - diagnostic imaging
/ Shoulder
/ Shoulder Dislocation - diagnostic imaging
