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Reconstruction of mechanical leg axis using non-modular cemented hinged prosthesis in complex primary total knee arthroplasty.
Jacob, Benjamin; Jacob, Nadja; Röhner, Eric; Wassilew, Georgi; Matziolis, Georg; Heinecke, Markus.
Afiliación
  • Jacob B; Orthopaedic Department Waldkliniken Eisenberg, University Hospital Jena, Campus Eisenberg, Eisenberg, Germany. b.jacob@waldkliniken-eisenberg.de.
  • Jacob N; Orthopaedic Department Waldkliniken Eisenberg, University Hospital Jena, Campus Eisenberg, Eisenberg, Germany.
  • Röhner E; Orthopaedic Department of the Heinrich-Braun-Hospital Zwickau, Campus Eisenberg, Klosterlausnitzer Straße 81, 07607, Eisenberg, Germany.
  • Wassilew G; Department of Orthopaedic Surgery, University Hospital Greifswald, Greifswald, Germany.
  • Matziolis G; Orthopaedic Department Waldkliniken Eisenberg, University Hospital Jena, Campus Eisenberg, Eisenberg, Germany.
  • Heinecke M; Orthopaedic Department Waldkliniken Eisenberg, University Hospital Jena, Campus Eisenberg, Eisenberg, Germany.
Arch Orthop Trauma Surg ; 2024 Jul 11.
Article en En | MEDLINE | ID: mdl-38987503
ABSTRACT

PURPOSE:

Modular cementless knee arthroplasty systems are capable of precise reconstruction of the mechanical axis. However, they are considered more susceptible to complications. In contrast, non-modular cemented systems are said to be more forgiving and show good long-term results. The aim of this study was to investigate the resulting leg axis after implantation of a non-modular cemented rotating hinged knee prosthesis. Furthermore, potential risk factors for the occurrence of malalignment and complications should be identified.

METHODS:

Between 2005 and 2015, 115 patients could be included in this monocentric retrospective cohort study. All patients underwent primary hinged non-modular cemented total knee arthroplasty. Preoperative and postoperative standardized long radiographs were analysed to determine resulting leg axis. Furthermore, epidemiological and intraoperative data as well as perioperative complications were surveyed.

RESULTS:

Average leg axis was 5.8° varus preoperatively and 0.6° valgus postoperatively. Considering an axis deviation of 3° as the target corridor, 27% of all cases examined were outside the desired range. 21% cases showed a femoral deviation from the target corridor and 15% showed a tibial deviation. There was a significant relationship between the preoperative mLDFA and the mechanical alignment of the femoral component (R = 0.396, p < 0.001) as well as between the preoperative mMPTA and the mechanical alignment of the tibial component (R = 0.187, p = 0.045). The mean operative duration was 96 min. No periprosthetic fractures were observed within the study cohort.

CONCLUSION:

The main result of the present work is that a non-modular cemented rotating hinged knee arthroplasty system can reconstruct the mechanical leg axis precisely and comparable to modular cementless and unconstrained total knee prostheses. Component malalignment is primarily dependent upon extraarticular deformity preoperatively. Periprosthetic fracture rates and duration of surgery were lower compared with current literature. LEVEL OF EVIDENCE Level III Retrospective cohort study.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Arch Orthop Trauma Surg Año: 2024 Tipo del documento: Article País de afiliación: Alemania Pais de publicación: Alemania
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Arch Orthop Trauma Surg Año: 2024 Tipo del documento: Article País de afiliación: Alemania Pais de publicación: Alemania