Abstract
BackgroundNo clinical data for the relationship of pronator quadratus (PQ) muscle to distal radius had been reported. The aim of this study was to investigate the anatomical features of the PQ muscle related to plate osteosynthesis for distal radius fractures in clinical cases. The feasibility of PQ muscle sparing surgery was investigated as well.MethodsFifty two distal radius fractures (23-A2) were enclosed in this study. The whole width of the muscle and the distance from the distal edge of the muscle to the joint surface of the distal radius were measured. The distance from the fracture site of the radius to the joint surface was measured as well.ResultsThe average width of the pronator quadratus muscle was 37.6 mm. The average distance from the pronator quadratus muscle to the lunate fossa surface was 12.2 mm, and the average distance from the pronator quadratus muscle to the scaphoid fossa surface was 13.6 mm. The average distance from the lunate fossa of the distal radius to the fracture site was 12.2 mm (range, 7.3-17 mm), and the scaphoid fossa of the distal radius to the fracture site was 13.2 mm (range, 9.4-18.8 mm).ConclusionsThis PQ muscle sparing surgery is feasible and can be performed without difficulty. The data might provide a useful basis for the preservation of pronator quadratus muscle applied to a functionally reduced fracture regarding the potential efficacy of conventional volar plate osteosynthesis.
Highlights
No clinical data for the relationship of pronator quadratus (PQ) muscle to distal radius had been reported
We presented a clinical study to show the anatomic features of the PQ muscle during open surgical reduction for distal radius
Stuart [9] reported that the superficial head of the PQ muscle is the prime mover in forearm pronation and the deep head is a dynamic stabilizer of the distal radioulnar joint in a study of healthy volunteers
Summary
No clinical data for the relationship of pronator quadratus (PQ) muscle to distal radius had been reported. The aim of this study was to investigate the anatomical features of the PQ muscle related to plate osteosynthesis for distal radius fractures in clinical cases. The traditional method of open reduction and plate fixation for distal radius requires wide exposure of the fracture site with stripping of the soft tissues which may devascularize the fracture fragments [1]. This will contribute to the necrosis caused by trauma itself or operation and, increase the risks of delayed healing and infection. The feasibility of PQ muscle sparing in conventional surgery for distal radius fracture was investigated
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