When you break a bone how does it mend?

Answer 1

A broken bone is a bone that has suffered stress. Such stress could lead to several types of fractures.

Answer 2

Yes they do. It takes a while, depending on the bone, and it's important to make sure the fracture is "set" -- re-alligned to the bone heals in the correct way. I don't completely understand what you're asking. Hope I got it right.

Answer 3

There are 3 phases shown below.

1. Reactive Phase

After fracture, the first change seen by light and electron microscopy is the presence of blood cells within the tissues which are adjacent to the injury site. Soon after fracture, the blood vessels constrict, stopping any further bleeding. Within a few hours after fracture, the extravascular blood cells form a blood clot, known as a hematoma. All of the cells within the blood clot degenerate and die. Some of the cells outside of the blood clot, but adjacent to the injury site, also degenerate and die. Within this same area, the fibroblasts survive and replicate. They form a loose aggregate of cells, interspersed with small blood vessels, known as granulation tissue.

2. Reparative Phase

Days after fracture, the cells of the periosteum replicate and transform. The periosteal cells proximal to the fracture gap develop into chondroblasts which form hyaline cartilage. The periosteal cells distal to the fracture gap develop into osteoblasts which form woven bone. The fibroblasts within the granulation tissue develop into chondroblasts which also form hyaline cartilage. These two new tissues grow in size until they unite with their counterparts from other parts of the fracture. These processes culminate in a new mass of heterogenous tissue which is known as the fracture callus. Eventually, the fracture gap is bridged by the hyaline cartilage and woven bone, restoring some of its original strength.

The next phase is the replacement of the hyaline cartilage and woven bone with lamellar bone. The replacement process is known as endochondral ossification with respect to the hyaline cartilage and bony substitution with respect to the woven bone. Substitution of the woven bone with lamellar bone precedes the substitution of the hyaline cartilage with lamellar bone. The lamellar bone begins forming soon after the collagen matrix of either tissue becomes mineralized. At this point, the mineralized matrix is penetrated by channels, each containing a microvessel and numerous osteoblasts. The osteoblasts form new lamellar bone upon the recently exposed surface of the mineralized matrix. This new lamellar bone is in the form of trabecular bone. Eventually, all of the woven bone and cartilage of the original fracture callus is replaced by trabecular bone, restoring most of the bone's original strength.

3. Remodeling Phase

The remodeling process substitutes the trabecular bone with compact bone. The trabecular bone is first resorbed by osteoclasts, creating a shallow resorption pit known as a "Howship's lacuna". Then osteoblasts deposit compact bone within the resorption pit. Eventually, the fracture callus is remodelled into a new shape which closely duplicates the bone's original shape and strength.

Answer 4

Bone stem cells. They undergo mitosis and form new bone cells to bridge the gap.

add Bone is a piezoelectric material- if it is stressed, a small voltage develops at the stress point. This voltage encourages new bone cells to place themselves properly. In some countries, they actually apply a small voltage across a bone break to speed healing.

Answer 5

time and no accual movement..

the bone cartilage over grows itself and wala you gota healed bone.

BUT i dont suggest breaking your bones seems like it hurts?

Answer 6

They mend by having a plaster cast to keep the bones in place and then they fix themselves back into place

Answer 7

relax dont move dont play softball etc.... go to the doctor ask questions dont do much with the arm get your mom to masah ittt