Critical Shoulder Angle and Acromial Index on 3D Models

Study Overview
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Brief Summary
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Objective: The relationship between rotator cuff tears and morphological features of the shoulder joint has not been fully explained. The earlier studies are usually done with two-dimensional radiography images, but joint positions and bone formations could not be fully evaluated in two-dimensional images. This study aims to evaluate the relationship between rotator cuff tears and critical shoulder angle (CSA) and acromial index (AI) values in three dimensions. Methods: This study examined computerized tomography of 24 rotator cuff tears (rotator cuff tear group) and 20 Bankart lesions, and no rotator cuff tears (control group). CSA and AI were measured on three-dimensional glenohumeral joint models obtained by three-dimensional reconstructions of computed tomography examinations. The investigators anticipate results of this study will guide clinicians in revealing the etiology of rotator cuff degeneration and determining the surgical method to be used for treatment.

Official Title
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Evaluation of the Relationship Between Critical Shoulder Angle and Acromial Index Measurements With Rotator Cuff Rupture on 3D Models

Conditions
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Shoulder Injuries, Rotator Cuff Tears, Rotator Cuff Injuries

Intervention / Treatment
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* Other: Computed Tomography


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: A total of 44 patients, including 24 patients with proven rotator cuff tear by arthroscopic surgery (rotator cuff tear group) and 20 patients with proven Bankart lesion and no rotator cuff tear by arthroscopic surgery (control group), were included in the study. Exclusion Criteria: Those with an inflammatory disease and trauma history were not included in the study.

Ages Eligible for Study
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Minimum Age: 17 Years
Maximum Age: 80 Years

Sexes Eligible for Study
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All

Study Plan
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How is the study designed?
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Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| The rotator cuff tear group<br> | Other: Computed Tomography<br>* In our study, computerized tomography of 24 rotator cuff tears (rotator cuff tear group) and 20 Bankart lesions, and no rotator cuff tears (control group) were examined. CSA and AI were measured on three-dimensional glenohumeral joint models obtained by three-dimensional reconstructions of computed tomography examinations.<br>|
| Control group<br> | Other: Computed Tomography<br>* In our study, computerized tomography of 24 rotator cuff tears (rotator cuff tear group) and 20 Bankart lesions, and no rotator cuff tears (control group) were examined. CSA and AI were measured on three-dimensional glenohumeral joint models obtained by three-dimensional reconstructions of computed tomography examinations.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Critical Shoulder Angle | The critical shoulder angle is defined as the angle formed between the plane of the glenoid and the line connecting the most lateral border of the acromion process, as seen on the true anteroposterior radiograph of the shoulder. | 2 hours | 
| Acromial Index | The acromial index is the distance between the glenoid plane and the lateral border of the acromion divided by the distance between the glenoid plane and the lateral aspect of the humeral head. | 2 hours |