Ac Joint Normal Xray

Right and left differ by no more than 2 3 mm.

Ac joint normal xray. 50 difference in size between the two shoulders is considered significant. 5 8 mm narrower in the elderly. The acromioclavicular joint can be assessed with standard shoulder x rays. Widening of the acromioclavicular joint normal.

The acromioclavicular joint acj is a plane synovial joint diarthrodial joint of the pectoral girdle. Normal radiographic measurements of the shoulder are important in evaluation of the osseous relationships in plain film radiography. If the joint is normal then acromioclavicular alignment should remain normal and symmetric. 3 article feature images from this case.

Minor ligamentous disruption may not be detectable on a plain radiograph as alignment is not lost. May be the only finding in type i injuries. Frontal normal acromioclavicular joint. Coracoclavicular distance usually 11 13 mm.

Grade ii is a partial dislocation of the ac joint with a complete disruption tear of the ac joint. 5 8 mm narrower in the elderly. Normal measurements do not rule out pathology and must be considered in the context of other findings and the clinical presentation. Loss of alignment of the inferior surfaces of the clavicle and acromion indicates disruption of the acromioclavicular ligaments at the acromioclavicular joint acj.

Rockwood classification of acromioclavicular joint injury. Right and left should differ by 5 mm. It has the normal separation of 4 mm. And a badly stretched or partially torn ac ligament.

Case contributed by assoc prof frank gaillard diagnosis not applicable diagnosis not applicable. An x ray study of 100 shoulders in us soldiers found considerable variation in the. Gross anatomy the acromioclavicular joint is between the small facet of the convex distal clavicle and flat medial acromion. The acromioclavicular joint or ac joint is a joint at the top.