Wedging the distal radius during corrective osteotomy

Wedging the distal radius during corrective osteotomy

Van Eig, E.R.

Dankelman, J. (mentor)
Tuijthof, G.J.M. (mentor)

Mechanical, Maritime and Materials Engineering

BioMechanical Engineering

BMD

2012-10-18

The currently performed corrective distal radius osteotomy procedures show several complications, such as tendon irritation and tendon rupture, due to friction with implemented fixation implants. This study focused on the development of a new fixation implant for positioning and fixation of bone segments for corrective osteotomy, that ensures a stable fixation and reduces the risk of tendon injuries and unnecessary soft tissue damage. We introduced the wedge concept, which consists of a patient-specific wedge and two screws. Two different experimental evaluation methods were used to assess the concept. Finite element modelling was used to determine the angle of screw insertion with the highest possible failure load. Physical wedge fixation experiments were used to investigate the effects of shear on the errors of the 6 correction parameters (3 translation, 3 rotations). If screws with an insertion angle of 10 degrees are used for the fixation of the wedge to the bone, the wedge concepts satisfies all demands and requirements. Additionally, the repositioning errors of the wedge concept were lower than other fixation technique studies for corrective distal radius osteotomies.

corrective osteotomy
distal radius
wedge

http://resolver.tudelft.nl/uuid:eb139576-0c3b-4921-b6d3-d2c38e697d61

2017-10-18

Student theses

master thesis

(c) 2012 Van Eig, E.R.