Clinical Report: Radiopalmar Double Plating vs Traditional Palmar Plating in Complex Distal Radius Fractures

Overview

This cadaveric study compared palmar variable-angle locking plate osteosynthesis alone versus combined palmar and radial buttress plating in a complex distal radius fracture model with dorsoradial metaphyseal comminution. The addition of a radial buttress plate aimed to improve fixation stability in challenging fracture patterns involving the radial styloid process.

Background

Locking plate technology has become the standard for operative treatment of distal radius fractures, with variable-angle locking plates enhancing fragment-specific fixation. However, complex fractures with extensive comminution and poor bone quality, especially in osteoporotic patients, remain difficult to stabilize and are prone to implant-related complications. Previous biomechanical studies have not fully addressed instability caused by dorsoradial bone loss. Supplementary radial plating has been proposed to improve stability in such cases, but its biomechanical advantage has not been thoroughly investigated until now.

Data Highlights

Nine pairs of fresh-frozen radii were used, with each pair receiving palmar plating on the left and combined palmar plus radial plating on the right. A standardized AO/OTA 2R3 C2.1 fracture with a 30° radiodorsal wedge defect was created. Biomechanical testing involved simulating tendon tension with a 500 g weight and applying load via a universal testing machine with a 1kN load cell. The radial plate was applied as a buttress with limited screw fixation to avoid extensive surgical exposure.

Key Findings

• Palmar variable-angle locking plate osteosynthesis is effective for distal radius fractures but may be insufficient in complex dorsoradial metaphyseal comminution.
• Supplementary radial buttress plating provides additional mechanical stability by counteracting fragment displacement, particularly in the radial styloid region.
• The radial plate was applied with limited screw fixation, emphasizing its role as a buttress rather than a load-bearing implant.
• Biomechanical testing simulated physiological tendon tension and load distribution across the scaphoid and lunate fossae to mimic in vivo conditions.
• The study design allowed direct paired comparison within donors, controlling for bone mineral density and anatomical variability.

Clinical Implications

In complex distal radius fractures with dorsoradial comminution, adding a radial buttress plate to standard palmar locking plate fixation may enhance construct stability and reduce implant-related complications. This approach could be particularly beneficial in osteoporotic bone or fractures involving the radial styloid process, potentially improving surgical outcomes without significantly increasing surgical exposure.

Conclusion

Radiopalmar double plating offers a biomechanically advantageous fixation strategy over traditional palmar plating alone in complex distal radius fractures with dorsoradial metaphyseal defects. This technique warrants further clinical evaluation to confirm its benefits in patient outcomes.

References

1. Schlonski et al. 2024 -- Comparative Analysis of Radiopalmar Double Plating Versus Traditional Palmar Plating in Complex Distal Radius Fractures