Acromial fracture is a not common type of fracture, and acromial fracture combined with acromioclavicular joint dislocation is even more rare, which belongs to one of the superior shoulder suspensory complex (SSSC) lesions. Studies have shown that the clinical prognosis of this injury is often poor. At present, the studies of the injury are too few to determine the best treatment option.

To investigate the clinical efficacy of clavicular hook plate combined with hollow screw fixation in the treatment of acromial fracture accompanied with acromioclavicular joint dislocation.

From January 2008 to December 2018, a total of 15 patients (13 males and 2 females) with acromial fracture accompanied with acromioclavicular joint dislocation were analyzed retrospectively. Their ages ranged from 18 to 60 years old, and the average age was (34.67±15.53) years. There were 8 cases of traffic injuries, 2 cases of fall injuries, 3 cases of high falls, and 2 cases of sports injuries. According to the classification of acromial fractures, there were 5 cases of Ogawa type I and 10 cases of Ogawa typeⅡ, and according to the classification of acromioclavicular dislocation, 7 cases were Tossy typeⅡ, and 8 cases were TossyⅢ. All acromial fractures were treated with open reduction and hollow screw fixation, and all acromioclavicular joint dislocations were treated with open reduction and clavicular hook plate fixation. One year after the operation, the function of affected shoulders was evaluated according to the range of motion and Constant-Murely scores.

All patients were followed up for at least one year, with an average follow-up time of (21.60±9.83) months. After operation, the incisions of all the cases were healed by first intention. No complications such as wound infection, poor fracture healing, loss of fracture and dislocation reduction, subacromial impingement, plate and screw loosening occurred. One year after operation, the range of shoulder motions were 90°-145° (114.00±19.29) ° of abduction, 100°-180° (136.67±27.10) ° of up lifting, 30°-60° (42.00±10.66) ° of posterior extension, and 30°-45° (38.00±6.76) ° of external rotation. The Constant-Murely scores were 70-96 points with an average of (85.73±7.26) points. There were 5 cases of excellent cases, 7 good cases and 3 moderate cases, and the excellent and good rate was 80%.

The treatment of acromial fracture and acromioclavicular joint dislocation with clavicular hook plate combined with hollow screw fixation is safe, simple and effective, and the functional recovery is satisfactory.