Clayton fracture is a common fracture in life, which is more common in middle-aged and elderly women, with more women than men. After the fracture, there will be typical deformity, obvious swelling at the joints, which is very painful. When you fall, your palms touch the ground, your wrists extend backward, your forearms rotate inward, and violence is transmitted upward. The distal radius is the junction of cancellous bone and dense bone, which is a weak anatomical place. Once subjected to external force, it is easy to break.

Pouteaul783 talked about this kind of fracture in 783. Abraham Colles is described in detail in 18 14. Since then, this kind of fracture has been commonly called Colles fracture, which has been used ever since. Colles fracture refers to the cancellous bone fracture of the distal radius, which is displaced backward. Colles fracture is one of the most common fractures in human body, accounting for about 6.7 ~ 1 1% of all fractures, mostly occurring in middle-aged and elderly people, with more women than men.

Injury mechanism:

Colles fractures are mostly caused by indirect violence, which are common in falling, elbow extension, forearm pronation, wrist extension and palm landing. Stress acts on the distal radius, causing this fragile part to fracture.

Frykman carried out static and dynamic tests on fresh corpses to clarify the mechanism of fracture. Among 48 limb specimens, 32 cases had experimental distal radius fractures. In the static test, it is confirmed that the wrist flexion is between 40 and 90, which can produce cancellous bone fracture at the distal radius. For men, the external load of fracture is greater than that of women.

The wrist dorsiflexion angle is related to the required load force. The smaller the dorsiflexion angle, the smaller the load force required for fracture, and vice versa. When the wrist dorsal extension is less than 40, the experiment produces a proximal forearm fracture; However, when the wrist dorsal extension is greater than 90, carpal fractures often occur. It is also confirmed in the dynamic test that the occurrence of cancellous bone fracture at the distal radius is closely related to the direction of force.