Open AccessThe effect of plate design and fixation type on primary stability after open wedge high tibial osteotomy
Author(s) -
Željko Stepanović,
Miroslav Živković,
Snežana Vulović,
Srbislav Aleksandrović,
Branko Ristić
Publication year - 2013
Publication title -
acta chirurgica iugoslavica
Language(s) - English
Resource type - Journals
eISSN - 2406-0887
pISSN - 0354-950X
DOI - 10.2298/aci1304037s
Subject(s) - cadaveric spasm , wedge (geometry) , high tibial osteotomy , stiffness , valgus , medicine , internal fixation , fixation (population genetics) , orthodontics , tibia , materials science , surgery , composite material , osteoarthritis , mathematics , geometry , population , alternative medicine , environmental health , pathology
Background: The stability of the open wedge high tibial osteotomy is dependent on an undamaged cortical hinge and design of the plate. Aims: We evaluated the primary stability of two internal fixation devices for open wedge high tibial osteotomy. Methods: Five pairs of cadaveric tibia with 10? valgus correction were stabilized with a newly designed plate with hybrid fixation and 10 mm spacer block and with conventional T plate with 10 mm spacer block. Static axial loads were applied until ultimate failure of the construct. Results: The average load at initial failure of the new plate construct was 4757.7 N compared to 3022.43 N obtained with the T plate, (p<0.01). The difference in initial stiffness of both constructs was not significant (p=0.27). The mean ultimate load at failure of the new plate construct was 5280.6 N compared to 3635.3N obtained with the T plate, (p=0.001). Conclusion: The new plate with hybrid fixation, provides substantial load resistance but similar stiffness when compared to standard T plate.