| Background:To analyze and discuss the related factors with the occurrence of subacromial impingement syndrome after the clinical application of clavicular hook plate in acromioclavicular joint dislocation.Methods and Patients:From Jan2010to Jan2012,25open reduction and internal fixations with clavicular hook plate were performed for acromioclavicular joint dislocation (9of them were performed another reconstruction of the coracoclavicular ligament). There were16males and9females with an average age of42.0years(range:20-59years) and all of these patients were diagnosed with type III (Rockwood) acromioclavicular joint dislocation. It was an average4.9days from the injury to the surgery (range:3-9days). The function and effect of treatment of shoulder was evaluated by the Karlsson’s criterion and also measured the acromio-humeral interval (AHI) and morphologic condition of acromion for each patient.Result: Regarding to the morphology of acromion, there were14type I (56%),8type II (32%),3type III (12%).All the patients have got follow-up with an average of10.0months (range:3-20months).4patients were documented of subacromial impingement syndrome during the follow-up,2male and2female with an average age of50.5years (range:45-53years);3type Ⅱ acromion and1type III acromion. The average acromio-humeral interval was (9.0±0.8)mm and(10.7±1.5)mm in the group of subacromial impingement syndrome and the group without subacromial impingement syndrome respectively. The difference between the two groups was statistically significant.3of the4patients have got the hook plate removed and the clinical sign of subacromial impingement syndrome disappeared. According the Karlsson’s scoring system, the excellent and good rate of the shoulder function was96%.Conclusion:The treatment of acromioclavicular joint dislocation with the hook plate has been proved to be effective. But there is great necessity to evaluate the morphology of acromion and measure the acromio-humeral interval before the surgery. |
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