Impact of Reverse Shoulder Arthroplasty Design and Patient Shoulder Size on Moment Arms and Muscle Fiber Lengths in Shoulder Abductors
Reverse shoulder arthroplasty (RSA) increases the moment arm of the deltoid, however there is limited knowledge on the accompanying changes in muscle architecture that play a role in muscle force production. The purpose of our study is to use a geometric shoulder model to evaluate the anterior deltoid, middle deltoid, and supraspinatus regarding 1) differences in moment arms and muscle-tendon lengths in small, medium, and large native shoulders, and 2) impact of three RSA designs on moment arms, muscle fiber lengths, and force-length (F-L) curves.
Osteochondritis dissecans of the knee may not cause any symptoms, but some people may experience pain and swelling. Engaging in competitive sports may contribute to its development.
Your shoulder is a ball and socket joint and very mobile. It may hurt for many reasons, from injury and overuse to chronic conditions or diseases. You need to know the cause to get effective treatment.
After an injury to your shoulder, elbow, arm, or wrist, you might need to wear a sling to protect it while you’re healing. A shoulder sling keeps your arm against your body and prevents you from moving it too much. However, if you wear a shoulder sling the wrong way, you might slow healing or injure your arm more.
Young contact athletes who underwent Latarjet for shoulder instability reported a 4% complication rate and 3% reoperation rate. Overall, 93% of patients reported improved quality of life postoperatively.