16 months old children have O-legs!

The most common causes of O-leg formation can be divided into three categories: 1, developmental factors, such as malnutrition or intestinal diseases leading to calcium and phosphorus deficiency, skeletal dysplasia, skeletal deformation or articular cartilage dysplasia, and genu varum changes; 2. Unbalanced factors Due to long-term bad posture or incorrect exertion habits, the muscles that dominate the joints are out of balance, which can lead to joint displacement and genu varus. This kind of joint displacement is completely different from the well-known joint dislocation. Joint dislocation is characterized by the relative displacement of the corresponding two articular surfaces and the loss of normal correspondence. Joint displacement is mainly manifested in joint rotation and abnormal joint space. When the knees stand parallel and close together, the patella rotates inward, which is caused by the whole rotation of the knee joint, not the subluxation of the patella. As long as the joint is corrected, the patella will return to the front. On the X-ray film, the medial space of the knee joint is not wide, and the medial space is obviously narrowed. 3. O-legs caused by trauma or other diseases.

The medial and lateral collateral ligament of knee joint is a stable structure of medial and lateral angle of knee joint, which can be adjusted adaptively with the change of joint. Under normal circumstances, the medial and lateral collateral ligaments of knee joint are not the key factors to form O-leg, but in some cases, such as trauma leading to injury of lateral collateral ligament, the stability of knee joint will also lead to O-leg, which is more common among athletes. Surgery is usually needed to repair the injured ligament during the treatment.

People with O-legs usually use the muscles on the outside of their legs to exert force when standing and walking, not on the inside. Therefore, the development of leg muscles is asymmetric, often with more lateral muscles and less medial muscles. In this way, the contour lines of leg muscles are curved, giving people the impression that bones are curved. In fact, not all bones are bent, only a few are really bent. If you want to judge whether the bone is bent, the most direct method is to take a positive X-ray.

Moreover, some unbalanced O-shaped legs are accompanied by abduction and displacement of the hip joint, which will lead to a large gap between the legs.