Geometric Comparison of Second Metatarsal Shortening Osteotomy Variations Using 3D Printed Patient-Specific Models:

摘要

Category:Midfoot/ForefootIntroduction/Purpose:Second metatarsal shortening osteotomy is frequently used in the treatment of metatarsalgia and aims to decrease metatarsophalangeal joint and plantar pressures. Although various proximal, midshaft, and distal metatarsal osteotomy methods have been described for surgical treatment of metatarsalgia, to our knowledge no studies quantitatively compared their resulting geometric corrections. The purpose of our study was to investigate how much each osteotomy variation changed the length of the metatarsal as well as the height and relative location of the metatarsal head (MH) itself.Methods:Following Institutional Review Board approval, three-dimensional computer models of second metatarsals of 5 deidentified clinic patients were extracted from CT scans using Mimics software. Fixed points were plotted on the printed models and a 3D coordinate digitizing arm (Microscribe) was used for precisely determining the 3D (x-y-z) coordinates of each point before and after th...