When a volar locking plate is not the right choice in fractures of the distal radius: Case based technical considerations

Management of isolated volar lunate facet fractures of the distal radius

Distal radius fractures are among the most common fractures treated globally. Consideration of the mechanism of injury and careful radiographic assessment contributes to appropriate management of these injuries in isolation or jointly with other fractures or injuries affecting the wrist joint. Treatment options can range from non-operative management to a variety of fixation techniques. Interest in the distal radius fractures was renewed as open reduction and monoblock volar locking plate fixation became the preferred contemporary treatment in the last few decades. Isolated volar lunate facet (VLF) fractures are uncommon. However, the stability of the entire carpus may be compromised with fractures of the volar marginal rim. Inadequately or improperly treated fractures of the VLF can lead to significant long-term complications. A critical approach to this unique fracture pattern's evaluation, management, and surgical fixation is paramount for successful and reproducible outcomes in stability and durability.

Single volar locking plating for the intra- and extra-articular distal radius fractures with dorsal metaphyseal comminution

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 single 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 single 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 single volar locking plating.

TRIAL REGISTRATION

This study has been registered on the ClinicalTrials.gov.