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Quantifying the kinematics of natural and prosthetic knee flexion |
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| Authors: | A.J. Long F.P. Monsell A.L. Redhead M.L. Porter D.W.L. Hukins |
| Affiliation: | * Department of Medical Biophysics, University of Manchester, Manchester M13 9PT, UK † Department of Orthopaedic Surgery, University of Manchester, Hope Hospital, Salford M6 8HD, UK ‡ Department of Orthopaedics and Trauma, Royal Preston Hospital, Preston, Lancashire PR2 4HT, UK § Department of Biomedical Physics and Bioengineering, University of Aberdeen, Aberdeen AB9 2ZD, UK |
| Abstract: | A new method has been developed for quantifying knee kinematics during flexion. This method was used to measure knee kinematics from lateral radiographs taken at different angles of flexion with the two femoral condyles superimposed in each image, thus standardizing the plane of flexion-extension. When applied to the radiographs of five healthy male volunteers (age range 21–26 years), it showed that flexion was accompanied by translation between the articular surfaces. Knee kinematics were also measured in five patients after total knee replacement (TKR) surgery with a KinemaxTM Modular Total Knee prosthesis (Howmedica, Warsaw, Indiana). In the TKR patients, a translation was detected in three out of the five patients. This indicates that the prosthesis is capable of restoring normal kinematics, but does not always do so. |
| Keywords: | Author Keywords: Kinematics knee prosthesis total knee replacement |
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