1. ConclusionThis method using clavicula hook plate is easy and convenient and the effect is reliable.

2. Conclusions Four methods are advantages and disadvantages. clavicula hook plate is a good internal fixation for treatments of acromioclavicular dislocation.

3. Objective To explore the clinical effect of clavicula hook plate in the treatment of acromion-clavicular joint dislocation.

4. Objective To evaluate the clinical effects of AO clavicula hook plate in treatment of acromioclavicular dislocation.

5. Objective:To conclude the experiences of using steinmann pins to treat fracture of clavicula.