The UniSpacer™: correcting varus malalignment in medial gonarthrosis. Preliminary results

Autor: M. Clarius, O. Bischel, J.B. Seeger, J.F. Becker, E. Cardenas-Montemayor, E. Röhner
Rok vydání: 2013
Předmět:
Zdroj: Revista Española de Cirugía Ortopédica y Traumatología (English Edition). 57:15-20
ISSN: 1988-8856
Popis: While options for operative treatment of leg axis varus malalignment in patients with medial gonarthrosis include several established procedures, such as unicompartmental knee arthroplasty (UKA), total knee arthroplasty (TKA), or high tibial osteotomy (HTO), so far there has been little focus on a less invasive option introduced more recently: the UniSpacer™ implant, a modern, self-centring, metallic interpositional device for the knee. This study not only evaluates whether alignment correction can be achieved by UniSpacer™ arthroplasty but also evaluates alignment change in the first 5 postoperative years. Antero-posterior long leg stance radiographs of 15 legs were digitally analysed to assess alignment change: two relevant angles and the deviation of the mechanical axis of the leg were analysed before and after surgery. Additionally, the change of the postoperative alignment was determined one and five years postoperatively. Analysing the mechanical tibiofemoral angle, a significant leg axis correction was achieved, with a mean valgus change of 4.7 ± 1.9°; a varus change occurred in the first postoperative year, while there was no significant further change of alignment seen five years after surgery. The UniSpacer™ corrects malalignment in patients with medial gonarthrosis; however, a likely postoperative change in alignment due to implant adaptation to the joint must be considered before implantation.
Databáze: OpenAIRE
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