Comparison of Locking Plate Fixation and Coracoclavicular Ligament Reconstruction for Neer Type 2B Distal Clavicle
Dong Jin Kim1, Yoon Min Lee1, Eun Ji Yoon1
1Department of Orthopedic Surgery, Yeouido St Mary's Hospital, The Catholic University of Korea, Seoul, Republic of Korea.
Background:
There remains no consensus regarding which repair technique provides the most optimal results for unstable distal clavicle fractures.
Purpose:
To compare radiologic and clinical outcomes between locking plate fixation and anatomic coracoclavicular (CC) ligament reconstruction for patients with unstable distal clavicle fractures.
Study Design:
Cohort study; Level of evidence, 3.
Methods:
The study included 41 patients with Neer type 2B distal clavicle fracture. In group A (n = 15), patients were treated using CC ligament reconstruction with autologous palmaris longus tendon, artificial tape, and Steinmann pin fixation; in group B (n = 26), patients were treated using anatomic locking plate fixation. All patients had a minimum 2 years of follow-up. CC distance and arthrosis of the acromioclavicular joint were assessed radiographically. Clinical outcomes-including range of motion, visual analog scale for pain, American Shoulder and Elbow Surgeons rating scale, and Constant score-were compared between the groups using the paired Student t test and Fisher exact test.
Results:
Bone union was attained in all patients. In both groups, the CC distance decreased significantly from presurgery to final follow-up: group A, from 16.25 ± 4.75 to 7.66 ± 2.61 mm (P < .001); group B, from 17.3 ± 4.07 to 9.33 ± 2.01 mm (P < .001). The final CC distance was significantly greater in group B (7.66 vs 9.33 mm in groups A and B, respectively; P = .028). Osteoarthritis of the acromioclavicular joint occurred in 13 of 41 patients (3 in group A and 10 in group B). At final follow-up, there was no statistical significance between the groups in range of motion, and clinical outcome scores were satisfactory in both groups, with no statistical difference between them.
Conclusion:
Anatomic locking plate and anatomic reconstruction of the CC ligament showed good clinical results, so both techniques can be considered reliable for restoring stability. However, CC ligament reconstruction had better CC distance on radiologic assessment and did not require removal surgery, so it may be the preferable surgical option to treat unstable distal clavicle fractures (Neer type 2B).
