- Feel a pop, then pain in your knee? It could be an ACL tear- You're playing tag with your kids, hitting a fast tennis return shot, landing after a gymnastics vault, evading a football tackle or jumping off a rock onto the beach. Suddenly, you feel a pop in your knee, then immediate pain followed by swelling. You may have just injured or torn your anterior cruciate ligament, or ACL. 
- What to Know About Shoulder Sprains and Strains- Shoulder sprains and strains are both injuries that can happen due to overuse of or trauma to the shoulder. While the symptoms of the two are similar, they involve different types of tissue within your body. Damage to these tissues can make it hard to move and use your shoulder. 
- Optimizing Knee Positioning During Arthroscopic Knee Surgery- In this Technical Note, we propose an approach to improve the existing knee positions using a metal round stool as a foot support. The method aims to reduce reliance on human assistants during knee arthroscopy procedures and restore the natural positioning of leg muscles, potentially improving procedural outcomes. 
- Estimating elbow loading conditions through the motion behaviors of subchondral bone density during joint movements- Evaluating complicated stress across the elbow under joint motion remains difficult. Here, we aimed to evaluate the distribution of the subchondral bone density in the normal elbow bones and further characterize their spatial relationships during elbow motion to estimate the loading stress across the articular surface using three-dimensional computed tomography bone models. 
- Subacromial Balloon Spacer for Massive Irreparable Rotator Cuff Tear is Cost-Effective in Older, Low-Demand Patients With Massive Irreparable Rotator Cuff Tear and Severe Comorbidities- The InSpace subacromial balloon spacer (Stryker, USA) is indicated for the treatment of massive irreparable rotator cuff tears. The device is placed in the subacromial space with the aim of restoring shoulder function by limiting painful acromiohumeral contact and recentering the superiorly migrated humeral head. However, controversy exists because two randomized controlled trials have produced conflicting findings with regards to efficacy. 







