Posterior shoulder instability is usually caused by traumatic posterior dislocation or repetitive minimally invasive injury during exercise or other activities, with an annual incidence rate of 4.64 cases per 100000 people per year. Several surgical techniques for the treatment of posterior shoulder

Metacarpophalangeal fracture is a common fracture in hand trauma, accounting for about 1/4 of the patients with hand trauma. because of the delicate and complex structure of the hand and the fine motor function, the management of hand fractures is far more important and technically complex than the treatment of other long tubular fractures.

Humeral stem fractures (HSF) are relatively common, accounting for approximately 1% to 5% of all fractures. The annual incidence is 13 to 20 per 100,000 people and has been found to increase with age.HSF has a bimodal age distribution, with the first peak occurring in men between 21 and 30 years of

Patellofemoral instability (PFI) is common in children's knee joint injuries. PFI is caused by the imbalance of patellar dynamic relationship in femoral trochlear groove. External dislocation of the patella is the extreme of PFI, which is caused by the injury of the medial stabilizer, resulting in the patella hitting the lateral femoral condyle.

Fractures are usually accompanied by injuries to other parts of the body. In the whole process of treatment, patients must be treated as a whole.