A kinematic study of lateral unicompartmental arthroplasty
Autor: | David Murray, Andrew Price, Jonathan Rees, B. J. Robinson, Ohkg. Oxford Hip, David J Beard |
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Jazyk: | angličtina |
Rok vydání: | 2016 |
Předmět: |
Adult
musculoskeletal diseases Time Factors medicine.medical_treatment Video Recording Knee kinematics Knee Injuries Kinematics Menisci Tibial Tendons medicine Humans Orthopedics and Sports Medicine Range of Motion Articular Arthroplasty Replacement Knee Flexion angle business.industry Significant difference Recovery of Function Anatomy musculoskeletal system Arthroplasty Sagittal plane Patellar tendon Biomechanical Phenomena Tibial Meniscus Injuries Meniscal bearing medicine.anatomical_structure Fluoroscopy business Follow-Up Studies |
Popis: | 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. |
Databáze: | OpenAIRE |
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