Medial and lateral gap laxity differential in computer-assisted kinematic total knee arthroplasty

The Bone & Joint Journal
P McEwenK Doma

Abstract

The results of kinematic total knee arthroplasty (KTKA) have been reported in terms of limb and component alignment parameters but not in terms of gap laxities and differentials. In kinematic alignment (KA), balance should reflect the asymmetrical balance of the normal knee, not the classic rectangular flexion and extension gaps sought with gap-balanced mechanical axis total knee arthroplasty (MATKA). This paper aims to address the following questions: 1) what factors determine coronal joint congruence as measured on standing radiographs?; 2) is flexion gap asymmetry produced with KA?; 3) does lateral flexion gap laxity affect outcomes?; 4) is lateral flexion gap laxity associated with lateral extension gap laxity?; and 5) can consistent ligament balance be produced without releases? A total of 192 KTKAs completed by a single surgeon using a computer-assisted technique were followed for a mean of 3.5 years (2 to 5). There were 116 male patients (60%) and 76 female patients (40%) with a mean age of 65 years (48 to 88). Outcome measures included intraoperative gap laxity measurements and component positions, as well as joint angles from postoperative three-foot standing radiographs. Patient-reported outcome measures (PROMs) were ...Continue Reading

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Citations

Feb 2, 2021·The Bone & Joint Journal·Samuel J MacDessiDarren B Chen
Feb 14, 2021·Knee Surgery, Sports Traumatology, Arthroscopy : Official Journal of the ESSKA·Edgar A WakelinChristopher Plaskos
Nov 19, 2020·EFORT Open Reviews·Theofilos Karachalios, George A Komnos
Oct 1, 2021·The Bone & Joint Journal·Fares S Haddad
Nov 26, 2021·Knee Surgery, Sports Traumatology, Arthroscopy : Official Journal of the ESSKA·Arun MullajiMurtaza Haidermota

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