Background: Volar locking plating remains a popular method for the surgical management of distal radius fractures. Dorsal metaphyseal comminution (DMC) is a common fracture pattern which weakens the stability during fracture fixation. In this study, we aimed to compare the radiographic and functional outcome of the intra- and extra-articular distal radius fractures with DMC following volar locking plate fixation.Materials and methods: Patients suffered from a distal radius fracture with DMC were reviewed in the clinical database of the authors’ institution between Jan 2016 and Jan 2020. The included patients were classified into the extra-articular (A3) group or the intra-articular (C2 and C3) group according to the AO/OTA system. The radiological parameters, wrist range of motion, and functional outcomes were evaluated following open reduction and volar locking plate fixation.Results: A total of 130 patients were included in this study with a mean follow-up length of 17.2 months. Compared with the A3 fracture group, no significant fracture re-displacement or reduced wrist ROMs was observed in the C2 fractures after 12-month’s follow-up. However, significantly decreased volar tilt (P = 0.003) as well as the extension/flexion ROMs were observed in the C3 fractures comparing to the A3 fractures. Most of the patients achieved an excellent (n = 75) or good (n = 51) Gartland and Werley wrist score. Four patients with C3 fractures resulted in a fair functional outcome due to a significant loss of volar tilt during follow-up.Conclusions: The volar locking plate fixation provided sufficient stability for distal radius fractures with DMC, and resulted in similar radiological and functional outcomes in the intra-articular distal radius fractures with a simple articular component (C2 fractures) as those in the extra-articular fractures. Considering the intra-articular fractures with multifragmentary articular component (C3 fracture), despite of the subsequent loss of volar tilt, the majority of the patients achieved good to excellent wrist function following volar locking plating.Trial registration: Not applicable because the design of the study is retrospective.
Backgrounds: The aim of this study was to assess the efficacy of a modified intrafocal pinning technique with three-dimensional (3D) planning to facilitate volar plating in dorsally comminuted intra-articular distal radius fractures.Methods: In total 35 AO/OTA type C2 and C3 fractures were finally included. The 3D digital model of the fracture was reconstructed based on preoperative computed tomographic (CT) images, with the displacement of the comminuted dorsal fragment and the intra-articular fragment analyzed for preoperative planning. During operation, a modified intrafocal pinning technique was applied percutaneously from the dorsal aspect of the radius to reduce the collapsed intra-articular fragment following volar plating. Adequate reduction was confirmed in all of patients considering radial height, radial inclination and volar tilt in postoperative radiographs.Results: No significant fracture re-displacement was observed in most of the cases during a mean follow-up period of 17.4 months, except for two patients with the C3 fracture. All of the patients achieved adequate clinical ROMs at 12 months postoperatively, with a mean DASH score of 12.0. Most of the patients achieved an excellent (n = 21) or good (n = 12) Gartland and Werley wrist score.Conclusions: Our modified intrafocal pinning technique with 3D planning contributes to a satisfactory clinical and radiological outcome in dorsally comminuted intra-articular distal radius fractures fixed with a volar locking plate.Trial registration: Not applicable because the design of the study is retrospective.
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