The joint has been dislocated.
It is called dislocation
A bone out of joint, which is also known as a dislocation can be caused from trauma. When a bone is out of joint, it is not advisable to hand the dislocation yourself. Trying to realign the bone could cause further damage and possible a fracture. It would be best to seek medical attention as soon as possible to minimize damage.
The tibia, or shin bone, is not a joint.
The hip bone and the shoulder bone its the knee bone joint
synovial joint
Partial displacement of a bone from its joint is a medical subluxation. Complete displacement of a bone from its joint is a dislocation.
The knee itself is made of ligaments cartilage and bone, and the kneecap is made of bone.
The major joints of the lower limb include the hip joint (ball and socket joint connecting the thigh bone to the pelvis), the knee joint (hinge joint connecting the thigh bone to the shin bone), and the ankle joint (hinge joint connecting the shin bone to the foot).
a bone moves when a joint doesn't.Bones are stiff, joints are bendy.
The three functional articulations are synarthrosis which is an immovable join and example would be a suture, amphiarthrosis a slightly immovable joint an example is the symphysis, and last the diarthrosis a freely movable joint such as the elbow or knee joint.
Ligaments hold bone to bone, normally in a complex working together to keep the joint stable. Also tendons tether muscle to bone around the joint to increase stability as well.
The joint between the sacrum and the hip bone is the sacroiliac joint. It is also known as the SI joint. They form the articular surfaces.