Biomechanical In Vitro - Stability Testing on Human Specimens of a Locking Plate System Against Conventional Screw Fixation of a Proximal First Metatarsal Lateral Displacement Osteotomy

Heino Arnold*, 1, Christina Stukenborg-Colsman2, Christof Hurschler3, Frank Seehaus3, Evgenij Bobrowitsch3, Hazibullah Waizy2
1 Orthopädisch - Unfallchirurgische Praxisklinik, Orthopädisches Zentrum Fichtelgebirge, Bahnhofstraße 10, 95111 Rehau, Germany
2 Orthopädische Klinik der MHH im Diakoniekrankenhaus Annastift, Anna-von-Borries-Straße 1-7, 30625 Hannover-Kleefeld. Germany
3 Orthopädische Klink der Medizinischen Hochschule Hannover, Labor für Biomechanik und Biomaterialien, Anna-von-Borries-Str. 1-7, 30625 Hannover, Germany

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© Arnold et al.; Licensee Bentham Open.

open-access license: This is an open access article licensed under the terms of the Creative Commons Attribution Non-Commercial License ( which permits unrestricted, non-commercial use, distribution and reproduction in any medium, provided the work is properly cited.

* Address correspondence to this author at the Orthopädisch - Unfallchirurgische Praxisklinik, Orthopädisches Zentrum Fichtelgebirge, Bahnhofstraße 10, 95111 Rehau, Germany; Tel: ++49928381097; Fax: ++49928381099; E-mail:



The aim of this study was to examine resistance to angulation and displacement of the internal fixation of a proximal first metatarsal lateral displacement osteotomy, using a locking plate system compared with a conventional crossed screw fixation.

Materials and Methodology:

Seven anatomical human specimens were tested. Each specimen was tested with a locking screw plate as well as a crossed cancellous srew fixation. The statistical analysis was performed by the Friedman test. The level of significance was p = 0.05.


We found larger stability about all three axes of movement analyzed for the PLATE than the crossed screws osteosynthesis (CSO). The Friedman test showed statistical significance at a level of p = 0.05 for all groups and both translational and rotational movements.


The results of our study confirm that the fixation of the lateral proximal first metatarsal displacement osteotomy with a locking plate fixation is a technically simple procedure of superior stability.

Keywords: Biomechanical stability testing, metatarsal osteotomy, locking plate system.