What is unusual about the ossification of the clavicle?
In these species, the forelimb is attached to the rest of the body only by muscles. In man the ossification of the clavicle is unusual: it begins in membrane (see Chapter 3: Introduction to the Skeleton: Bone, Cartilage and Joints), and then develops a pair of cartilaginous centres that ossify.
What is clavicle ossification?
The collarbone is the first bone to begin the process of ossification (laying down of minerals onto a preformed matrix) during development of the embryo, during the fifth and sixth weeks of gestation. Its lateral end is formed by intramembranous ossification while medially it is formed by endochondral ossification.
What happens if clavicle healed wrong?
The patient will need to see your doctor until the fracture heals. The fracture can move out of place before it heals. If the bone heals in the wrong position, called a “malunion”, it can affect the patient’s shoulder function..
How many Centres of ossification does clavicle have?
two
We confirmed that the clavicle is formed by two membranous primary ossification centers appearing by 6 weeks and fusing approximately 1 week later. Cartilage at both ends of the clavicle then develops.
At what age is ossification complete?
Ossification
| Time period | Bones affected |
|---|---|
| 18 to 23 years | Bone of the lower limbs and os coxae become completely ossified |
| 23 to 26 years | Bone of the sternum, clavicles, and vertebrae become completely ossified |
| By 25 years | Nearly all bones are completely ossified |
What bones are made from Intramembranous ossification?
Intramembranous ossification is the process of bone development from fibrous membranes. It is involved in the formation of the flat bones of the skull, the mandible, and the clavicles.
What muscles are affected by a broken clavicle?
The muscles involved in clavicle fractures include the deltoid, trapezius, subclavius, sternocleidomastoid, and sternohyoid.
How do you know if a broken collarbone needs surgery?
Specifically, surgery should be strongly considered if the fracture is shortened by 2 centimeters or more, displaced more than 100% (the fractured ends aren’t touching at all), when there are specific fracture patterns (such as Z-type fractures), or when the fractures are highly comminuted (shattered).
How is the ossification of the clavicle unusual?
In man the ossification of the clavicle is unusual: it begins in membrane (see Chapter 3: Introduction to the Skeleton: Bone, Cartilage and Joints), and then develops a pair of cartilaginous centres that ossify. The clavicle contains bone marrow, but lacks a medullary cavity: at least this is the condition of the bone in man.
What causes pain and swelling in a clavicle fracture?
People sustain clavicle fractures from a variety of injuries ranging from falls, automobile accidents, sports injuries, and other traumatic injuries. When a clavicle fracture occurs, it is common to have pain and swelling at the site of the injury.
How long does it take for a clavicle fracture to heal?
However, fractures in adults or teenagers who have stopped growing take 10 to 12 weeks to heal and may take longer. Most clavicle fractures will heal completely by four months in an adult.
What are the risks of a nonunion clavicle fracture?
Specific risks for nonunion of a fracture include: 1 Female patient 3 2 Older patient 3 Displacement of the fracture (broken ends not touching) 4 Comminution (multiple, small fragments of bone) 5 Patient smokes 3 More