A kinematic study of lateral unicompartmental arthroplasty.
Knee
; 9(3): 237-40, 2002 Sep.
Article
em En
| MEDLINE
| ID: mdl-12126685
ABSTRACT
When the Oxford unicompartmental meniscal bearing arthroplasty (UCA) is used in the lateral compartment 10% of the bearings dislocate. A fluoroscopic study was performed to investigate if abnormal mid-sagittal plane kinematics was related to bearing dislocation. Video fluoroscopy is an accepted means of determining in-vivo knee kinematics in the sagittal plane. Video fluoroscopy was obtained of 5 Oxford lateral UCAs 10 years post-operatively and of five normal knees. Patellar tendon angle (PTA), derived from dynamic fluoroscopic images, was used to describe the joint kinematics. This in-vivo experiment demonstrated that the PTA/knee relationship for the Oxford lateral UCA is similar to the normal knee. Both the normal knee (r(2)=0.99) and the Oxford lateral UCA (r(2)=0.98) demonstrated a linear relationship between flexion angle and PTA. No significant difference in PTA was found between the normal knee and the Oxford lateral UCA. This study demonstrated normal kinematics, as indicated by PTA, ten years after implantation of the Oxford lateral UCA. It is therefore reasonable to suggest that abnormal kinematics is not a significant factor relating to meniscal bearing dislocation in the lateral compartment.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Tendões
/
Meniscos Tibiais
/
Amplitude de Movimento Articular
/
Artroplastia do Joelho
/
Lesões do Menisco Tibial
/
Traumatismos do Joelho
Tipo de estudo:
Observational_studies
/
Prognostic_studies
Limite:
Adult
/
Humans
Idioma:
En
Revista:
Knee
Assunto da revista:
ORTOPEDIA
Ano de publicação:
2002
Tipo de documento:
Article
País de afiliação:
Reino Unido