Final answer:
The most common type of pelvic fractures are stable fractures, with impacted and avulsion fractures being the most frequently seen. Healing of pelvic fractures involves formation of a hematoma and calli, with eventual bone remodeling for complete recovery.
Step-by-step explanation:
The most common type of pelvic fracture varies according to the population and circumstances; however, when considering the general public, the most frequently seen pelvic fractures are stable fractures, which include impacted fractures and avulsion fractures.
An impacted fracture happens when the bone is driven into itself, which often occurs in the pelvis due to falls or other compression forces. Avulsion fractures in the pelvis are typically the result of a sudden, forceful pull of the muscle where it is attached to the bone, often seen in athletes. Pelvic fractures can also be life-threatening if they involve the ring of bones around the lower torso, which can result in damage to internal organs, nerves, and blood vessels.
Healing of fractures typically begins with a hematoma, succeeded by the development of internal and external calli. Osteoclasts resorb the dead bone while osteoblasts form new bone that eventually replaces the cartilage in the calli, culminating in bone remodeling and complete healing.