Management of acute grade IV and greater acromioclavicular dislocations: Open acromioclavicular brace versus arthroscopic double DogBone® endobutton.

INTRODUCTION: Several surgical techniques exist to manage grade IV acute acromioclavicular dislocation (ACD). However, the conventional acromioclavicular brace technique (ACB) has never been compared to the arthroscopic DogBone® (DB) double endobutton technique. The aim of this work was to compare the functional and radiological results of DB stabilization with those of ACB. HYPOTHESIS: DB stabilization provides similar functional results with a low rate of radiological recurrences compared to ACB. MATERIAL AND METHODS: This is a case-control study comparing 17 cases of ACD operated by DB (DB group) between January 2016 and January 2021 with 31 cases of ACD operated by ACB (ACB group) between January 2008 and January 2016. The primary outcome was the difference in the D/A ratio (reflecting vertical displacement) measured on an anteroposterior acromioclavicular (AC) X-ray compared between the 2 groups at one-year after surgery. The secondary outcome was a clinical evaluation at one-year using the Constant score and clinical AC instability. RESULTS: At revision, the mean D/A ratio in the DB and ACB groups was 0.4±0.5 [-0.4-1.6] and 1.6±0.3 [0.8-3.1] respectively (p>0.05). Two patients (11.7%) in the DB group had implant migration with radiological recurrence while 14 patients (33%) had radiological recurrence in the ACB group (p<0.05). CONCLUSION: The DB technique limits the radiographic recurrence of acute ACD with an equivalent functional result at 1-year postoperatively compared to the conventional ACB technique, which implicitly requires a second operation for hardware removal. The DB technique has become the technique of choice in first-line treatment of acute grade IV ACD. LEVEL OF EVIDENCE: III; retrospective case-control series.

Comparison of double screw fixation versus tension-band fixation after olecranon osteotomy for complex distal humerus fractures.

INTRODUCTION: Supra- and intercondylar elbow fractures are surgically challenging given the intra-articular comminution. Various surgical approaches have been described. Among these-olecranon osteotomy-provides optimal joint exposure but is associated with several complications. Tension band wiring (TBW) is the most commonly used fixation method. We hypothesized that double screw fixation would lead to fewer surgical revisions than TBW (all causes included) after olecranon osteotomy. METHODS: We carried out a single-center retrospective study of 39 patients, treated between January 2007 and April 2016, for a supra- or intercondylar elbow fracture using the transolecranon exposure. There were 34 type C fractures (13 C1, 6 C2 and 15 C3), 3 type B fractures and 2 type A fractures, based on the AO classification. Fourteen patients received double screw fixation and 25 received TBW. The primary outcome measure was the number of surgical revisions, regardless of cause. Secondary outcome measures were the number of surgical revisions for olecranon nonunion, fixation failure or fixation device removal due to pain. RESULTS: There were significantly more surgical revisions in the TBW group than in the double screw fixation group: 3 (21%) versus 14 (56%) (p=0.049, Fisher test). The three main reasons for revision in the TBW and double screw fixation groups were removal of the fixation device due to soft tissue impingement (11 [44%] versus 2 [14%]; p=0.08), failure of the olecranon fixation (6 [24%] versus 1 [7%] p=0.38), and olecranon nonunion (4 [16%] versus 0 [0%] p=0.27). DISCUSSION: There are no published studies on the outcomes of this surgical technique. The posterior transolecranon approach provides the best exposure at the elbow joint. TBW fixation is associated with multiple complications. Double screw fixation for olecranon fractures yields good clinical and radiological outcomes. CONCLUSION: Based on our findings, double screw fixation of the olecranon results in fewer surgical revisions (all causes combined) than TBW in supra- and intercondylar elbow fractures operated by a transolecranon approach. LEVEL OF EVIDENCE: IV.

Imaging of shoulder arthroplasties and their complications: a pictorial review.

Currently, an increasing number of patients benefit from shoulder prosthesis implantation. Radiologists are therefore more often confronted with imaging examinations involving shoulder arthroplasty, whether during a dedicated examination or incidentally. Standard radiography is the first-line imaging modality in the follow-up of these implants, before the possible use of cross-sectional imaging modalities (computed tomography and magnetic resonance imaging), ultrasound, or nuclear medicine examinations. Shoulder arthroplasties are divided into three categories: reverse shoulder arthroplasty, total shoulder arthroplasty, and partial shoulder joint replacement (including humeral hemiarthroplasty and humeral head resurfacing arthroplasty). Each of these prostheses can present complications, either shared by all types of arthroplasty or specific to each. Infection, periprosthetic fractures, humeral component loosening, heterotopic ossification, implant failure, and nerve injury can affect all types of prostheses. Instability, scapular notching, and acromial fractures can be identified after reverse shoulder arthroplasty implantation. Glenoid component loosening and rotator cuff tear are specific complications of total shoulder arthroplasty. Progressive wear of the native glenoid is the only specific complication observed in partial shoulder joint replacement. Knowledge of different types of shoulder prostheses and their complications' radiological signs is crucial for the radiologist to initiate prompt and adequate management.

Intramedullary nailing for adult open tibial shaft fracture. An 85-case series.

INTRODUCTION: Treatment of open tibial shaft fracture is controversial due to the risk of infection. We assessed results in a continuous series of open tibial shaft fractures treated by primary intramedullary nailing. HYPOTHESIS: Factors can be determined for non-union and onset of infection following primary intramedullary nailing in open tibial shaft fracture. PATIENTS AND METHOD: A retrospective study assessed open tibial shaft fractures treated by primary intramedullary nailing between January 2007 and December 2013. Fractures were classified on the AO and Gustilo classifications. Infection rates and time to union were compared. RESULTS: Eighty-five patients (85 fractures) were included: 13 Gustilo type I, 43 type II, 19 type III-A and 10 type III-B. Eight patients had infection (9%). Healing and union were obtained after nail exchange and reaming in 5 cases, and after bone transport in 2. One patient showed non-union at last follow-up. Infection risk did not correlate with Gustilo (p=0.55) or AO type (p=0.69). The interval between trauma and wound debridement was significantly longer in infected patients (p=0.048). Eighty-three fractures (97.6%) healed, at a mean 6.9±6.1 months (range, 2-40). Non-union was associated with AO type (p=0.04), and showed a non-significant association with Gustilo type (p=0.06). DISCUSSION: Time to treatment was the only factor influencing risk of infection. Non-union was related to AO comminution grade. Primary intramedullary nailing seemed reliable if treatment was early, with rigorous debridement. The advantages then are early resumption of weight-bearing and low patient burden. LEVEL OF EVIDENCE: V, retrospective study.