Three-dimensional scapular kinematics during commonly used rehabilitation exercises in patients 12 weeks after Reversed Shoulder Arthroplasty.

Background: Reversed shoulder arthroplasty (rTSA) is often used to restore functionality in patients with joint arthropathy and dysfunctional rotator cuff. As rTSA changes the biomechanical properties of the shoulder, an altered movement pattern of arm and scapula is to be expected. Previous studies focused on changes of the scapulohumeral rhythm during functional elevation tasks.

The lesser tuberosity C-block osteotomy for anatomical total shoulder arthroplasty has no negative impact on the volumetric ratio of the transversal force couple.

Background: Mobilization of the subscapularis muscle (SSC) is crucial for optimal access to the glenohumeral joint during anatomical total shoulder arthroplasty (ATSA). However, the ideal mobilization technique remains controversial. This study aimed to assess the impact of the lesser tuberosity C-block osteotomy, a modified lesser tuberosity osteotomy, on the postoperative subscapularis (SSC) volume following anatomical shoulder arthroplasty and compare it to the volume of the infraspinatus/teres minor.

3D quantitative CT study to assess rotator cuff muscle fatty infiltration.

Fatty infiltration is a degenerative condition of the tendon-muscle unit of rotator cuff muscles, characterized by fatty accumulation within and around the muscles. This study compares a 3D method to the Goutallier classification for evaluating fatty infiltration of the rotator cuff muscles. Employing a retrospective study design, four researchers performed 3D segmentation of the rotator cuff muscles on 65 CT scans of patients with rotator cuff arthropathy.

Electromyographic analysis of selected shoulder muscles during shoulder rehabilitation exercises in patients after reverse total shoulder arthroplasty.

Background: Reverse shoulder arthroplasty (RSA) aims to restore function in patients with rotator cuff failure and joint arthropathy. After surgery, patients are routinely referred to a rehabilitation specialist to regain range of motion, strength, and function. A key element in these programs is active exercises.

Three-dimensional glenohumeral relationship in cuff tear arthropathy and its correlation with the type of cuff tear.

Objective: The main purpose of this study is to evaluate 1) the three-dimensional (3D) glenohumeral relationship in cuff tear arthropathy (CTA) and 2) the correlation between different types of rotator cuff tears (RCTs) and the 3D glenohumeral relationship.

Method: A total of 124 patients with CTA and 60 control patients were included in this study. 3D models of computed tomography images of the shoulder were reconstructed to evaluate the position of the humerus in relation to the scapula using a Cartesian coordinate system.