Compare the clinical and radiological outcome between the arthroscopic and open surgical repair using suture button device method in cases with acute AC joint disruption
Age of 16 to 60 years
Definite radiographic diagnosis of isolated Rockwood type IIIb(unstable), IV and type v acromioclavicular joint dislocation
Time from injury to operation < 3 weeks
Patient with complete at least 12-month follow-up assessments
. Age outside the range
Open injury, old injury (≥ 3 weeks since injury)
Injury caused by other diseases (tendinitis, metabolic, et al.), concurrent shoulder osteoarthritis, arthropathy or any fracture
Any previous operation of the injured limb
Patients meeting the inclusion criteria and willing to take part in the study will be included investigators conducted an a priori test for sample size calculation using the G\*Power 3.1.9.2 software. investigators assumed a CMS mean difference between the 2 groups of 16 points, a standard deviation of 20 points, an alpha of 0.05, and power (1 - b) of 80%; 21 subjects had to be included in each group. Our goal was to include 27 cases in each group to compensate for any lost subjects during the follow-up phase
Case-control
Prospective
Not listed
Radiological evaluation using the true anteroposterior view of the shoulder
Radiological evaluation using the true anteroposterior view of the shoulder and AC projection (10 cephalic tilt with the beam centered over the AC joint)
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