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Biomechanical Assessment of Locked Plating for the Fixation of Patella Fractures
Simone Wurm1, Peter Augat, Volker Bühren
1*Department of Traumatology, BG Trauma Center Murnau, Murnau, Germany; †Institute of Biomechanics, BG Trauma Center Murnau, Murnau, Germany; and ‡Institute of Biomechanics, Paracelsus Medical University Salzburg, Austria.
Objective:
To analyze the mechanical stability of locked plating in comparison with tension-band wiring for the fixation of fractures of the patella.
Methods:
Biomechanical tests were performed on artificial foam patella specimens comparing an angular stable plate and monocortical screws with tension-band wiring. Tests were performed under combined tension and bending until failure simulating physiological loading of the tibia during walking.
Results:
Tension-band wiring failed at 66% of the failure load of plating (1052 N, P = 0.002) and had 5 times larger fracture gap displacements (P = 0.002).
Conclusions:
Based on the biomechanical advantages, locked plating of the patella may constitute a reasonable alternative in the treatment of patella fractures.
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