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Biomechanical comparison in a cadaveric flatfoot model between different calcaneal osteotomies with and without
Emilio Wagner1, Pablo Wagner2, Sebastian Gericke3
1Foot and Ankle Surgeon, Clinica Alemana de Santiago, Universidad del Desarrollo, Santiago, Chile.
Introduction:
Progressive collapsing flexible foot deformities are generally treated with joint-preserving techniques. Our objective was to evaluate biomechanically the effect of different calcaneal osteotomies with or without a peroneus brevis to longus transfer (PBtoPL) on a cadaveric flatfoot model.
Methods:
15 cadaveric foot and ankle specimens were used in a mid-stance phase of gait model. Evans, medial displacement, Double, Z (step cut), and IZ (inverted Z) osteotomies were compared. A Vicon positioning system was used to measure angular changes.
Results:
Evans and Double osteotomies generated the highest adduction effect; Z and IZ osteotomies generated 50 % less. Evans, Double and IZ osteotomies created a significant supination effect. The PBtoPL transfer produced non-significant changes.
Conclusions:
Evans and Double osteotomies were the most potent calcaneal osteotomies. Evans, Double, and IZ osteotomies had a similar supination effect. Further studies are needed to explore the role of the PBtoPL tendon transfer in greater detail.
