Proximal metatarsal osteotomies: A comparative geometric analysis conducted on sawbone models

Meir Nyska, Hans Jörg Trnka, Brent G. Parks, Mark S. Myerson

Research output: Contribution to journalArticlepeer-review

Abstract

We evaluated the change in position of the first metatarsal head using a three-dimensional digitizer on sawbone models. Crescentic, closing wedge, oblique shaft (Ludloff 8° and 16°), reverse oblique shaft (Mau 8° and 16°), rotational "Z" (Scarf), and proximal chevron osteotomies were performed and secured using 3-mm screws. The 16° Ludloff provided the most lateral shift (9.5 mm) and angular correction (14.5°) but also produced the most elevation (1.4 mm) and shortening (2.9 mm). The 8° Ludloff provided lateral and angular corrections similar to those of the crescentic and closing wedge osteotomies with less elevation and shortening. Because the displacement osteotomies (Scarf, proximal chevron) provided less angular correction, the same lateral displacement, and less shortening than the basilar angular osteotomies, based upon this model they can be more reliably used for a patient with a mild to moderate deformity, a short first metatarsal, or an intermediate deformity with a large distal metatarsal articular angle. These results can serve as recommendations for selecting the optimal osteotomy with which to correct a deformation.

Original languageEnglish
Pages (from-to)938-945
Number of pages8
JournalFoot and Ankle International
Volume23
Issue number10
DOIs
StatePublished - 1 Oct 2002
Externally publishedYes

Keywords

  • Geometry, Sawbone Models
  • Hallux valgus
  • Osteotomy

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