Complex radial head fractures – a pathology not to be under estimated

Aim: Complex radial head fractures are often underestimated in their complexity with consequent poor outcomes. Method: We retrospectively reviewed thirty-two Mason 2 and 3 radial head fractures treated surgically with open reduction and internal fixation by generalist orthopaedic surgeons and trainees over a four-year period. They were clinically, radiologically and functionally assessed for this study. Functional assessment was done using the Mayo elbow performance score (MEPS). Results: There were fourteen Mason 2 and eighteen Mason 3 radial head fractures. The Mason 2 were fixed by K-wires (n=2), Herbert TM screws (n=5), Acutrack TM screws (n=3), and T-plates (n = 4). The Mason 3 were fixed by Herbert TM screws (n=6), Acutrack TM screws (n=4) and T plates. Average follow up was 47 months (range 22–65 months). The arc of elbow motion was 1040 (range 680_1400), with an average extension deficit of 230 (range 00–500) and an average flexion deficit of 200 (range 100–400). The average arc of forearm rotation was 1300 (range 00–1400), with an average supination of 660 (range 00–750), and an average pronation of 680 (range 00–800 ). The complications (N=17/32) included superficial skin infection (n=2), transient posterior interosseous nerve palsy (n=4), broken T -plate (n=1), intra-articular placement of a screw (n=1), loose and backed out screw (n=1), non-, union of radial head (n=2). Fixed flexion deformity if elbow (n=4) and mild elbow in stability (n=2). Second surgery was preformed in 18.7 % (n=6/32)(radial head replacement n=1, anterior capsulectomy n=4 and removal of screw n=1). Conclusion: Radial head trauma surgery is an underestimated source of poor clinical outcomes. Complex radial head fractures should be clinically and radiologically evaluated with the knowledge that they are difficult to accurately and comprehensively assess. The treatment of such fractures may warrant management by a sub-specialist, although this latter conclusion has not been corroborated to date.