How does a metal plate heal broken bone?

Metal plates used in the treatment of broken bones serve several functions in facilitating the healing process:

Stabilization:

One of the primary purposes of a metal plate is to stabilize the broken bone fragments. By holding the bone fragments in place, the plate prevents movement and allows the bone to heal properly. Stable fixation minimizes micromotion, which can interfere with the formation of new bone tissue and lead to delayed healing or nonunion.

Alignment:

The metal plate helps align the bone fragments correctly, restoring the bone's normal anatomy. Proper alignment is crucial for the bone to heal straight and regain its full function.

Compression:

Some metal plates are designed to provide compression across the fracture site. This compression helps to close any gaps between the bone fragments, facilitating bone formation and healing.

Support:

The plate provides additional support to the injured area, especially in cases of complex fractures or when the bone is weakened. It bears a portion of the load applied to the bone, reducing stress on the healing bone and promoting stability.

Scaffold for Bone Growth:

Metal plates act as a scaffold for new bone growth. The bone cells, called osteoblasts, can adhere to the surface of the plate and lay down new bone tissue, leading to the formation of a bony union between the bone fragments.

Infection Prevention:

In cases of open fractures, where the bone has been exposed to the external environment, metal plates can help prevent infection. They create a barrier that shields the fracture site from potential contaminants, reducing the risk of infection and promoting a more efficient healing process.

While metal plates play a vital role in the treatment of broken bones, it's important to note that they are not always necessary. The decision to use a metal plate depends on the type and severity of the fracture, as well as the patient's overall health and condition.