Mid-flexion stability in the anteroposterior plane is achieved with a medial congruent insert in cruciate-retaining total knee arthroplasty for varus osteoarthritis.
Knee Surg Sports Traumatol Arthrosc
; 29(2): 467-473, 2021 Feb.
Article
em En
| MEDLINE
| ID: mdl-32157363
ABSTRACT
PURPOSE:
This study aimed to compare the intraoperative kinematics, especially for mid-flexion femorotibial anteroposterior (AP) stability, between newly developed medial congruent (MC) inserts and cruciate-retaining (CR) inserts in navigated cruciate-retaining total knee arthroplasty (CR-TKA).METHODS:
Thirty consecutive patients with varus osteoarthritis undergoing CR-TKA using an image-free navigation system were enrolled. AP kinematics, the AP translation under manual maximum stress to the knee joint at 45° flexion, rotational kinematics, and varus-valgus laxity were evaluated using a navigation system and statistically compared between the MC and CR inserts.RESULTS:
AP kinematic analysis showed that the femoral position with the CR insert was significantly anterior at a maximum extension to 45° flexion compared with the MC insert (p < 0.05). The amount of AP translation at 45° flexion with the MC insert was significantly smaller than that with the CR insert (p < 0.05). Rotational kinematics found that the tibial position at maximum extension was significantly externally rotated with the MC inserts than with the CR inserts. Varus-valgus laxity was comparable between the MC and CR inserts.CONCLUSION:
The current results showed that greater mid-flexion AP stability was achieved with the MC inserts than with the CR inserts in CR-TKA. Intraoperative kinematics with the MC inserts more closely resembled those with preoperative conditions in CR-TKA. LEVEL OF EVIDENCE III, prospective comparative study.Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Temas:
Geral
Base de dados:
MEDLINE
Assunto principal:
Artroplastia do Joelho
/
Osteoartrite do Joelho
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Instabilidade Articular
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Articulação do Joelho
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Prótese do Joelho
Tipo de estudo:
Observational_studies
Limite:
Aged
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Female
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Humans
/
Male
Idioma:
En
Revista:
Knee Surg Sports Traumatol Arthrosc
Assunto da revista:
MEDICINA ESPORTIVA
/
TRAUMATOLOGIA
Ano de publicação:
2021
Tipo de documento:
Article
País de afiliação:
Japão