Introduction: The aim of the study was to compare the early treatment results of acromioclavicular dislocations addressed by surgical hook plates and tension wire band in the period of six months from the surgery. Material and method: Two cohorts of patients treated surgically for acromioclavicular dislocation were evaluated. In the HOOK group, 24 patients (23 men, 1 woman, average age 41.7 years) were stabilized with the hook plate (Synthes, USA). In the CERC group, the method of tension wire band was used to treat 29 patients (men only, average age 38.8 years). Rockwood injury rates: HOOK - 6 times grade II, 16 times grade III and two times grade V; CERC - 6 times grade II, 20 times grade III and 3 times grade V. Clinical and X-ray findings were evaluated. Results: The mean follow-up was 7.1 months in the HOOK group and 6.3 months in the CERC group. In the HOOK group, full arm mobility was restored in 23 patients (95.8 %) and in one case (4.2 %) abduction above 80° was reduced. The range of motility in the CERC group was limited in five patients (17.2 %). This was a limitation above 110°, 115°, 125° and twice above 135°. The spacing of the acromioclavicular articulation prior to implant extraction occurred in the HOOK group in three cases (12.5 %), in the CERC group in one case (3.4 %). In the HOOK group, four cases (16.7 %) showed proximalization of the collarbone after extraction of the implant. In the CERC group after extraction of the osteosynthetic material, there was 1 case of reluxation (3.4 %) to Rockwood II type and only one case of a slight displacement (3.4 %). In the CERC group, the collarbone was proxima­lized twice during healing prior to extraction (6.9 %), with one case (3.4 %) of redislocation at the tearing the bond off the acromion. Implant loose­ning occurred in the CERC group in a total of 14 cases (48.3 %), we haven‘t observed it in the HOOK group. The constant score in the HOOK group was 0.96, in the CERC group 0.89. Discussion: Current literature often mentions the possibility of a successful conservative therapy for degree II and III of acromioclavicular dislocation. The disadvantage of stabilization using tension wire band and hook plate is the necessity of two surgical interventions. Reconstruction using tendon grafts and stabilization using special fibres are also used, as well as the arthroscopic methods. Conclusion: Clinical results after surgical treatment of acromioclavicular dislocations using hook plate and tension wire band bring about good results. In the period of six months after the surgery, there is more frequent limitation of motility when using tension wire band, especially in connection with the migration of Kirschner wires. Stabilization with a hook plate is affected by fewer complications.

Department of Orthopedics of the 1st Faculty of Medicine Charles University Prague and University Hospital Motol

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