الفهرس 
Aim of the studyOnly 14 pages are availabe for public view
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Abstract
Research over the last few years has continued to focus on the shape of the acromion in the coronal plane, including proposed radiological parameters to describe the lateral extension of the acromion. A widely cited study by Moor et al. proposed the concept of the critical shoulder angle (CSA) (5) .
The CSA combines the measurement of glenoid inclination and lateral extension of the acromion and provides a quantitative measurement of the acromion. It is easy to measure on a standard radiograph and studies of reproducibility have underscored its reliability (7) .
The CSA is defined as the angle between the plane of the glenoid fossa and a line connecting the inferolateral point of the acromion with the inferior glenoid margin on standardized anterior-posterior (AP) radiographs of the shoulder (upright position) with a visible joint space, normal CSA ranges from 30 – 35° (6) .
Our study was a prospective study of thirty shoulders that had arthroscopic acromioplasty at Menoufia University Hospital from march 2021 till the end of April 2022.
The main results of the study revealed that:
Our results reveal a significant decrease in the CSA by 2.9° after arthroscopic anterolateral acromioplasty, this decrease was highly significant.
There is a significant increase in CSA two months post-operatively with the maintenance of CSA at a level below the preoperative level, this result was significant
Summary
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No significant differences were found in the decrease of CSA in both groups, preoperative CSA > 35° and CSA 30–35°, both groups decreased with the same amount with an average of 2.9°.
There was an insignificant correlation between CSA and All socio-demographic, preoperative, and intraoperative parameters as regards age, sex, manual working, diabetes millets, smoking, affected side, dominance, history of trauma, rotator cuff tear size, number of anchors, frozen shoulder, preoperative conservative period, and history of subacromial injection.