Ac Joint Measurement Radiopaedia

If the joint is normal then acromioclavicular alignment should remain normal and symmetric.

Ac joint measurement radiopaedia. Normal measurements do not rule out pathology and must be considered in the context of other findings and the clinical presentation. Ac radiographs are performed for a variety of indications including. Widening of the acromioclavicular joint. These are performed with the patient erect and holding a weight in the arm.

50 difference in size between the two shoulders is considered significant. Coracoclavicular distance usually 11 13 mm. Right and left should differ by 5 mm. 5 8 mm narrower in the elderly.

The mean distance of the acjs to the sonic head was 10 1 0 2 mm. Inferior plane of the distal clavicle should be on same plane as inferior border of. Alasaarela e 1 tervonen o takalo r lahde s suramo i. Superior and inferior acromioclavicular ligaments strengthen the joint capsule figs 2 3a thus reinforcing the joint at small degrees of distraction 9.

The cc distance is assessed on frontal radiography of the shoulder or clavicle or the coronal projection or a ct or mri as the distance between the superior cortex of the coracoid process and the undersurface of the clavicle where the cc ligaments insert. The acromioclavicular joint acj is a plane synovial joint diarthrodial joint of the pectoral girdle. Features of acromioclavicular joint injury include 6. Direct blows to the shoulder region.

The cc distance is assessed on frontal radiography of the shoulder or clavicle or the coronal projection of a ct or mri as the distance between the superior cortex of the coracoid process and the undersurface of the clavicle where the cc ligaments insert. To evaluate the value of ultrasonography in assessing arthritic acromioclavicular ac joints. May be the only finding in type i injuries. The horizontal joint play was 1 3 0 9 mm with intact ligaments 1 4 1 2 mm by transecting the ac ligaments and 1 9 1 3 mm after additionally transecting the cc ligament fig.

In addition there are weaker anterior and posterior ligaments that reinforce the joint. Normal radiographic measurements of the shoulder are important in evaluation of the osseous relationships in plain film radiography. The acromioclavicular ac joint radiographic series is used to evaluate the acromioclavicular joint and the distal clavicle. 6 this examination was regardless of examiner training and individual and patient side mobility of the corpse distance of the acj to the.

Right and left differ by no more than 2 3 mm. Gross anatomy the acromioclavicular joint is between the small facet of the convex distal clavicle and flat medial acromion.