Extramedullary femoral alignment system in total knee arthroplasty: Accuracy in relation of severity and different types of varus

Alberto Aquili; Pier Paolo Canè; Marco Fravisini; Luca Farinelli; Roberto Procaccini; Antonio Pompilio Gigante

doi:10.1016/j.jor.2021.02.007

Extramedullary femoral alignment system in total knee arthroplasty: Accuracy in relation of severity and different types of varus

J Orthop. 2021 Feb 12:24:86-90. doi: 10.1016/j.jor.2021.02.007. eCollection 2021 Mar-Apr.

Authors

Alberto Aquili¹, Pier Paolo Canè², Marco Fravisini², Luca Farinelli¹, Roberto Procaccini¹, Antonio Pompilio Gigante¹

Affiliations

¹ Clinical Orthopaedics, Università Politecnica delle Marche, Ancona, Italy.
² Centro di Artroscopia e Chirurgia del Ginocchio, Clinica "Sol et Salus", Rimini, Italy.

Abstract

Objectives: We assessed the accuracy of an extramedullary guide system for femoral component alignment in TKA.

Methods: We retrospectively analysed 87 total knee arthroplasties using a newly developed extramedullary guide system.

Results: Correct postoperative coronal plane femoral component, with deviation from neutral alignment by 3° or less, was found in 87% of the study population. The percentages were 100%, 91% and 79% for HKA of 0-3°, 3-10° and >10°respectively.

Conclusion: The correct use of the extramedullary guide system allows the restoration of the neutral mechanical axes of the lower limb, especially in cases of limited varus deformity.

Keywords: Extramedullary alignment; Surgical technique; Total knee arthroplasty.