2.Osteoarthritis
It is most classic type of Arthritis which is a degenerative joint disease caused because of wear and tear of the shoulder due to age or trauma. Older people, over the age of 50, are generally susceptible to develop osteoarthritis. Shoulder osteoarthritis involve two primary processes:
The cartilage in the joints break down and
Bony growths called osteophytes develop in the joint which causes friction
Osteoarthritis is more commonly found in the Acromioclavicular (AC) joint.
3.Post-traumatic Arthritis
This type of arthritis is caused post an injury. Shoulder fractures and shoulder dislocations may often lead to post-traumatic arthritis. Injuries due to sports and other accidents may also lead to this type of arthritis. Car accidents are reported to be the most common ways of getting post-traumatic arthritis.
After certain injuries, the bones may not heal the way they are normally supposed to heal. This then affects how the joint works and moves which puts additional pressure on the cartilage. Overall, it will cause wear and tear of the shoulder joints.
4.Avascular Necrosis
Avascular Necrosis is a condition where a portion of the bone of humeral head looses its blood supply and dies. Various terms are used for Avascular Necrosis as follows:
Osteonecrosis
Ischemic Necrosis
Aseptic Necrosis
Bone infarction
In the shoulder joint, there is continuous process of remodeling of bones. Old bone dies and new bones are formed. However, due to loss of blood supply in the bone of the humeral head, the cells that produce new bone die. Without the formation of new bone, the old structure looses strength and collapses thus affecting the normal functioning of the shoulder joint. This is called Avascular Necrosis.
5.Rotator Cuff Tear Arthropathy
Rotator Cuff is made up of four muscles that surround the humeral head of the shoulder. These muscles are attached to the bone by tendons. Due to age or injury, the rotator cuff develops tear. If tears are left untreated, they enlarge and involve a larger portion of the rotator cuff. The muscles will be no longer attached to the bone and this affects the shoulder strength and stability which leads to Rotator Cuff Tear Arthropathy. Not all cuff tears leads to cuff tear arthropathy. The factors that causes certain patients to develop arthritis is not fully understood.
For questions related to Shoulder Arthritis, write to http://bangaloreshoulderinstitute.com/contact/