Weight-bearing line at the ankle joint level shifted laterally after total knee arthroplasty for varus knee osteoarthritis: Evaluation of the hip-to-calcaneus line - 23/03/24
, Akihiro Kanamori, Kosuke Okuno, Masashi Yamazaki
Bienvenue sur EM-consulte, la référence des professionnels de santé.
Article gratuit.
Connectez-vous pour en bénéficier!
Abstract |
Background |
Few studies have comprehensively examined how alignment beyond the ankle joint changes after Total knee arthroplasty (TKA). This retrospective study aimed to answer the questions: (1) do the radiological parameters beyond the ankle joint, including the weight-bearing line at the ankle joint level, change after TKA in varus knee osteoarthritis? (2) Does the lower extremity alignment correlate with alignment beyond the ankle joint?
Hypothesis |
Our hypothesis was that TKA altered the radiological parameters beyond the ankle, which correlated with the lower extremity alignment.
Patients and methods |
This retrospective study included 67 patients who underwent mechanically aligned TKA for varus knee osteoarthritis. The hip-knee-ankle angle (HKA), tibial plafond inclination angle (TPIA), hindfoot alignment angle (HA), talar tilt (TT), and weight-bearing line at the ankle joint level (mechanical ankle joint axis point [MAJAP]) were measured using radiographs taken before and 6 months after TKA; each parameter was compared between the two time points. The correlations between HKA and other parameters were examined preoperatively and postoperatively.
Results |
The mean HKA, TPIA, HA, TT, and MAJAP changed significantly after TKA from 15.0±6.1̊ to 2.6̊±3.5̊, from 10.8̊±5.7̊ to 4.7̊±3.9̊, from 2.3̊±5.5̊ to –2.5̊±4.5̊, from 0.2̊±1.3̊ to –0.5̊±1.4̊, and from 29.3±23.3 to 54.3±20.6, respectively. Correlations were noted between the preoperative HKA and the preoperative TPIA (r=0.58), HA (r=0.36), and MAJAP (r=–0.59), and between the postoperative HKA and the postoperative TPIA (r=0.54) and MAJAP (r=–0.38).
Discussion |
TKA for varus knee osteoarthritis altered radiological parameters beyond the ankle, with the weight-bearing line at the ankle joint level passing more laterally. The weight-bearing line at the ankle joint level was correlated with lower extremity alignment both preoperatively and postoperatively.
Level of evidence |
IV; single-centre retrospective observational study.
Le texte complet de cet article est disponible en PDF.Keywords : Total knee arthroplasty, Coronal alignment, Ankle joint, Radiological parameters, Hip-to-calcaneus line
Plan
Vol 110 - N° 2
Article 103690- avril 2024 Retour au numéro
Article précédent
- Limb length change after total knee arthroplasty for valgus deformity does not affect the clinical score and is not affected by fixed flexion deformity
- Sung-Mok Oh, Seong-Il Bin, Jong-Min Kim, Bum-Sik Lee, Jongjin Lee, Kinam Bae
- Medium-term patient's satisfaction after primary total knee arthroplasty: enhancing prediction for improved care
- Michele Ulivi, Luca Orlandini, Mario D’Errico, Riccardo Perrotta, Sofia Perfetti, Simona Ferrante, Linda Greta Dui
Bienvenue sur EM-consulte, la référence des professionnels de santé.