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Radiological evaluation of the acromioclavicular joint
U Väätäinen1, A Pirinen, A Mäkelä
1Department of Surgery, Kuopio University Central Hospital, Finland.
Skeletal Radiology
|January 1, 1991
Summary
Accurate X-ray measurements of the acromioclavicular (AC) joint are challenging. The distance between the coracoid process and clavicle offers the most reliable method for assessing AC joint laxity, with normal range up to 3 mm.
Area of Science:
- Orthopedics
- Radiology
- Anatomy
Background:
- Acromioclavicular (AC) joint X-ray measurements present challenges due to variable projections and lack of reproducibility.
- Standardized and reliable methods are needed for accurate assessment of the AC joint's condition.
Purpose of the Study:
- To identify the most reliable X-ray measurement for evaluating the acromioclavicular (AC) joint.
- To determine the normal range of AC joint laxity under stress.
Main Methods:
- 28 healthy adult volunteers underwent X-ray imaging.
- Evaluated various measurement techniques for reproducibility and vulnerability to projection errors.
- Assessed the effect of stress to determine normal joint laxity.
Main Results:
- The distance between the coracoid process and the superior aspect of the clavicle proved to be the least projection-dependent measurement.
- The normal range of acromioclavicular joint laxity was established as 3 mm.
Conclusions:
- Measuring the distance between the coracoid process and clavicle is recommended for reproducible AC joint assessment.
- A normal AC joint laxity of up to 3 mm was determined, providing a benchmark for clinical evaluation.