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A new elevating metatarsal osteotomy: geometrical design and applications
Emilio Wagner1, Cristián Ortiz, Andrés Keller
1Unidad de Tobillo y pie, Clïnica Alemana, Santiago, Chile.
Journal of Surgical Orthopaedic Advances
|January 8, 2014
Summary
This study introduces the elevating metatarsal osteotomy (EMO), a new surgical technique for foot deformities. The EMO allows for precise shortening, lengthening, and elevation of the metatarsal head, addressing limitations of the Weil osteotomy.
Area of Science:
- Orthopedic Surgery
- Podiatric Surgery
- Biomechanical Engineering
Background:
- The Weil osteotomy, common for metatarsalgia and toe deformities, often causes undesirable metatarsal head depression.
- This depression alters intrinsic muscle function and can lead to phalanx extension, complicating treatment outcomes.
Purpose of the Study:
- To introduce and geometrically analyze a novel surgical technique: the elevating metatarsal osteotomy (EMO).
- To demonstrate the EMO's capability to shorten, lengthen, and elevate the metatarsal head, offering an alternative to the Weil osteotomy.
Main Methods:
- Development of a geometrical model for planning an oblique subcapital osteotomy with slice resection.
- Application of trigonometric analysis to precisely calculate the extent of shortening, elevation, or lengthening achievable with the EMO.
- Quantification of metatarsal head and bone changes based on distal and dorsal displacement.
Main Results:
- The EMO technique achieves metatarsal head elevation equivalent to one-third of the resected slice width.
- Distal and dorsal displacement of the metatarsal head results in significant bone lengthening (65%) and elevation (60%).
Conclusions:
- The elevating metatarsal osteotomy (EMO) provides a versatile method for adjusting metatarsal head height and bone length.
- This technique offers a valuable solution for complex toe deformities and instability where metatarsal head positioning is critical.
