Osteoarthritis is the most common type of shoulder arthritis. This is also known as degenerative joint disease. Less common types of shoulder arthritis are rheumatoid arthritis (inflammatory) and traumatic arthritis.
The Shoulder
Shoulder Fracture
A shoulder fracture can result from a fall on the shoulder, a motor vehicle accident, contact sports, etc. The type of shoulder fracture varies by age. Most fractures in children occur in the clavicle bone (collarbone). In adults, the most common fracture is of the top part of the humerus (upper arm bone).
Shoulder Pain
The shoulder is a ball and socket joint that allows a wide range of movement. Injury or degradation of the joint structures, from the muscles and soft tissues to the bones, can result in shoulder pain.