Skeletal Trauma

Skeletal trauma occurs when there is an injury to the bones or joints. Common conditions include fracture which is a complete or incomplete break in the bone subluxation.

When there is partial separation of a bone from a joint and dislocation. When there's a complete separation of a bone from the joint within the skeletal system, bones and joints work together with other tissues to provide structure, support protection for internal organs and to facilitate body movement.

Bones also serve as a reservoir for calcium and phosphate and play a key role in calcium homeostasis. Lastly, bones are continually involved in remodeling which involves bone resorption, formation of new bone and bone repair.

This is accomplished through cells called osteoclasts which break down old bone for reabsorption and osteoblasts which lay down new bone to replace the bone that was resorbed.

This continual remodeling helps maintain the health and functionality of bones. The basic types of bone are cortical or compact bone which is found in the outer layer of bones and cancellous or spongy bone which is found in the interior of bones.

The structure of cortical bone helps it to tolerate compression and shearing forces while cancellous bone is better equipped to absorb and distribute stress throughout the bone.

Now, joints are the place for two or more bones come together and they provide varying degrees of range of motion. For example, fibrous joints like those between the bones of the skull barely move at all.

Whereas synovial joints like those of the shoulders and hips move more freely. Joints are supported by cartilage ligaments and tendons which help stabilize them and facilitate movement.

Ok. Skeletal trauma typically occurs due to external forces being exerted on the body like falls or direct blows.

A fracture is a break in the continuity of a bone and occurs when the force exceeds the strength of the bone. Risk for fractures, increases due to factors that weaken the bone like smoking, alcohol use Vitamin D deficiency and long term use of glucocorticoid medications also advanced age and underlying conditions like osteoporosis, increase the risk of fractures.

On the other hand, dislocations and subluxations can occur due to sudden impact or twisting. Both occur most often in younger adults in the joints of the shoulders, wrists, fingers and knees.

Additionally, having a congenital condition like developmental dysplasia of the hip or connective tissue disorder like Marfan syndrome can make joints less stable, increasing the risk of injury.

Lastly, having a history of joint dislocation or subluxation makes it more likely that it'll happen again in the future.

All right, fractures are categorized in a few ways. First, they can be complete.

Meaning the bone is fully broken or incomplete, meaning there's partial breakage but the bone is still in one piece. Some examples of complete fractures are comminuted fractures where the bone breaks into multiple fragments and impacted fractures.

When a piece of one bone gets wedged into another. Bone, examples of incomplete fractures include green stick fractures which occur when one side of the bone breaks while the other side of the bone bends and bowing fractures or the bone bends but doesn't break completely.

Next, fractures are further classified as closed where the skin remains intact or open, also called compound when the bone pushes through the skin.

Other categories of fractures include pathologic fractures that occur from normal weight bearing or activity due to any disease that weakens the bone such as osteoporosis or hypoparathyroidism and stress fractures, which can occur with healthy or diseased bone due to the a cumulative effects of repeated stress.

So immediately following a fracture, a hematoma or a mass of clotted blood forms at the site of the fracture which temporarily provides stabilization.

Inflammation occurs at the site as white blood cells arrive and start to clean up debris and release inflammatory mediators.

Next, a soft callus is formed as the hematoma is gradually replaced by fibrous material and collagen which serves as a connecting bridge between the injured ends as healing continues.

Osteoblasts begin laying down new bone at the fracture site and eventually a hard bony callus forms. Finally, remodeling occurs as osteoclasts resorb excess bone.

While osteoblasts continue laying down new bone over time, the bone starts to resemble its normal shape and structure again and becomes strong enough for regular use.

Now, dislocations and subluxations commonly occur alongside fractures as the bone breaks and separates from the joint or they can occur on their own.

When this happens, support structures around the joint like ligaments, tendons and muscles are stretched, torn or damaged and sometimes nearby nerves are also damaged.

Now, skeletal trauma typically causes localized tenderness, edema, bruising and limited mobility. In some cases, movement can be completely restricted.

Typically, there's pain that worsens with movement and is associated with the injury itself or from inflammation or pressure from edema.

In certain injuries, the affected part of the body can look misaligned, shortened or even deformed. For example, with an open fracture, the bone can be visualized through a break in the skin.

Whereas with a dislocation, the joint in attached extremity may appear out of place or limp. All right.

As a quick recap, skeletal trauma involves injuries to bones or joints such as fractures, subluxations and dislocations fracture is a complete or incomplete break in the bone.

Subluxation refers to a partial separation of a bone from a joint and dislocation is a complete separation of a bone from the joint.

These injuries typically result from external forces but can also be related to underlying conditions leading to symptoms like pain, swelling and limited mobility