Patient specific pointer tool for corrective osteotomy

Quality of symmetry based planning and case study of ulnar reconstruction surgery

verfasst von

Samuel Mueller, Lueder Alexander Kahrs, Johannes Gaa, Tobias Ortmaier, Jan Dierk Clausen, Christian Krettek

Abstract

Malunion after forearm fractures are described to appear in 2% to 10% of cases. Reconstructive surgeries ensure adequate anatomical repositioning. Their importance derives from the fact that malunion can often lead to severe pain as well as deformities causing loss of function and aesthetic issues not only in the forearm, but also the wrist and elbow joint. In this paper a clinical case will be presented using a Patient Specific Instrument (PSI) as navigational aid for reconstructive surgery after malunion of a proximal ulnar fracture combined with allograft surgery of the radial head and radial condyle due to chronic traumatic radial head luxation (Monteggia fracture). A planning method based on symmetry is described and evaluated on twelve Computed Tomographic (CT) data sets of intact forearms. The absolute point to point deviation at distal end of the ulnar styloid process was used as a characteristic value for accuracy evaluation. It is 7.9 ± 4.9 mm when using only the proximal end of the ulna for registration. The simulated change of ulnar variance is −1.4 ± 1.9 mm. Design and concept of the PSI are proven in a clinical trial

Organisationseinheit(en)

Institut für Mechatronische Systeme

Externe Organisation(en)

Medizinische Hochschule Hannover (MHH)

Typ

Artikel

Journal

INJURY

Band

48

Seiten

1325-1330

Anzahl der Seiten

6

ISSN

0020-1383

Publikationsdatum

07.2017

Publikationsstatus

Veröffentlicht

Peer-reviewed

Ja

ASJC Scopus Sachgebiete

Notfallmedizin, Orthopädie und Sportmedizin

Elektronische Version(en)

https://doi.org/10.1016/j.injury.2017.05.012 (Zugang: Geschlossen)