AC Joint pain not be well localised to the AC joint. Pain is worse when lifting the arm overhead. There is often a tender bony lump over the top of the shoulder where the AC joint lies if it is arthritic.
Traumatic Anterior Dislocation is most commonly seen in young males, however, it can affect anyone that suffers a high energy traumatic injury to the shoulder. Typically, the shoulder dislocates forwardly due to an injury.
Calcific Tendonitis is a relatively common shoulder condition. It has a peak onset age of 40 years of age. It affects women more commonly than men. The most commonly affected of the rotator cuff tendons is the supraspinatus tendon.
Frozen shoulder is also called adhesive capsulitis. It typically affects patients between the ages of 40 to 60 years old. It occurs in approximately 2% of the population; however, it is more common in patients with other medical conditions such as diabetes, thyroid disease and cardiac problems.
Rotator cuff tears may be partial or full thickness tears. They may occur as part of a degenerative process where the tendon progressively becomes weaker and wears out or they may be precipitated by impingement.
Impingement occurs when the supraspinatus tendon or the region where the supraspinatus tendon is attached to the humerus, contacts the under surface of the acromion and the coraco-acromial ligament.
There are two major categories of shoulder instability; Traumatic & Multidirectional. The commonest instability pattern is Traumatic Anterior Dislocation. It is seen in patients who suffer an injury to their shoulder and dislocate out the front of the shoulder.
Tendonitis means inflammation of the tendon. The rotator cuff tendons are particularly prone to tendonitis and of the rotator cuff tendons, the one that is most commonly involved is the supraspinatus tendon.
The subacromial bursa is a structure that lies between the upper surface of the rotator cuff and the under surface of the acromion. The bursa in fact, is a potential space that lies between two surfaces that move.