Knee varus
Introduction
Introduction to knee varus Knee varus, commonly known as "O-legs", "Road legs", "Bow legs", " basket legs" and so on. When the two lower limbs are naturally straightened or standing, the two legs can touch each other and the two knees cannot be close together as the main manifestation of the deformed disease. It means that at the knee joint, the calf's tibia is rotated inward by an angle. Calcium deficiency and heredity are the two foundations for the formation of O-legs, but the more direct reasons are the walking, standing, sitting and some movements. Walking outside the splayed feet, standing in a short position, wearing high heels, sitting, squatting, squatting, etc., will give the knee an outward force, and this force will pull the lateral collateral ligament of the knee. Will cause the knee collateral ligament to relax. When the lateral collateral ligament is slack, the excessive force of the medial collateral ligament will pull the calf tibia to the inside to form a knee varus. O-leg correction methods include: surgery, positive O instruments, splints, leggings, exercise, orthopedic insoles. basic knowledge The proportion of illness: 0.003% Susceptible people: more common in early childhood Mode of infection: non-infectious Complications: knee osteoarthritis
Cause
Cause of knee varus
Calcium deficiency (25%):
Normal people's blood calcium is maintained at 2.18-2.63 mmol/L (9-11 mg/dl), and if it is below this range, it is considered to be calcium deficiency. Calcium deficiency can cause diseases such as X-shaped legs, "O" legs, and chicken breasts.
Bad walking habits (30%):
Walking outside the splayed feet, standing in a short position, wearing high heels, sitting, squatting, squatting, etc., will give the knee an outward force, and this force will pull the lateral collateral ligament of the knee. Will cause the knee collateral ligament to relax. When the lateral collateral ligament is slack, the excessive force of the medial collateral ligament will pull the calf tibia to the inside to form a knee varus.
Rickets (20%):
When a child with a ricket disease grows to about 1 year old, when the student learns to walk, the leg is difficult to load the weight of the body, which causes the lower limb to bend outward to form an O-leg.
Prevention
Knee varus prevention
1. Eight-step correction method. Step backwards, pay attention to the heel first, the route straight. Take eight steps at a time.
2. The method of exercising the inner muscles of the legs: the feet are separated from the shoulders, the feet are slightly buckled, and the knee joints are buckled and erected. 20 groups, 2 to 4 groups per day. You don't need to squat completely.
3. Correct the direction of the femur. Lying flat, the feet are bent, the calves and the thighs are at 45 degrees, and the buttocks are raised to make the upper body and the thighs flat.
Complication
Knee varus complications Complications knee osteoarthritis
In normal knee joints, the pressure is evenly distributed across the articular surface. For people with O-legs, the body weight is too concentrated on the medial articular surface of the knee joint due to knee inversion. Excessive pressure and friction can cause the cartilage surface of the knee joint to wear, the tibial plateau collapses, and secondary osteoarthritis. When you are older, you will easily develop joint pain and affect normal walking activities.
Symptom
Knee varus symptoms Common symptoms Knee varus in vivo asymmetrical joint pain gait gait
The main symptom of knee varus is knee inversion and the leg is "O" shaped.
Examine
Knee varus check
1. Generally, according to the two indexes of normal knee distance and active knee distance, the degree of severity of knee varus is judged. The so-called normal knee distance refers to the distance inside the knee joint when the two legs are close together and the legs and knees are relaxed.
2. Active knee distance refers to the distance between the two legs and the knees and the knee joints in the upright position, and the distance inside the knee joints.
3. According to the normal knee distance and the active knee distance, "knee varus" is divided into I degree, II degree, III degree and IV degree.
4. The normal knee distance is below 3 cm, the active knee distance is 0, the normal knee distance is below 3 cm, the active knee distance is greater than 0, and the normal knee distance is between 3-5 cm. At III degrees, the normal knee distance is greater than 5 cm, which is IV degree.
Diagnosis
Knee varus diagnosis
Diagnostic points:
When the lower limbs are naturally straight or standing, the two internal heels can touch each other and the two knees cannot be close together, which can be directly clarified, and the full length sacral line of the lower limb can determine the angle of the deformity.
In the double heel, the two feet together, relax the legs upright, such as the distance between the knees, it means there is knee varus.
Generally, the severity of knee varus is determined according to two indexes of normal knee distance and active knee distance.
The so-called normal knee distance refers to the distance inside the knee joint when the two legs are close together and the legs and knees are relaxed.
The active knee distance refers to the distance between the two legs and the knees and the knee joints in the upright position, and the distance inside the knee joints.
