Factors affecting patellar tracking after total knee arthroplasty.

This study examined factors that influence patellar tracking after total knee arthroplasty. A total of 62 knees were evaluated radiographically for postoperative patellar tracking. Six factors were examined regarding their influence on postoperative patellar tracking. This study showed the effects of patellar component position, patellar resection angle, and lateral retinacular release on postoperative patellar tracking. There was no significant effect of the remaining 3 factors: the thickness of the patellar resection, preoperative patellar tilt, and rotational alignment of the femoral component. A medialized patellar component and obliquity of resection of the patella are effective for obtaining proper patellar tracking, whereas the evaluation of the influence of the external rotation of the femoral component requires more clinical studies.

[1]  K. C. Chan,et al.  Postoperative patellar tilt in total knee arthroplasty. , 1999, The Journal of arthroplasty.

[2]  V. Goldberg,et al.  Patellar fracture type and prognosis in condylar total knee arthroplasty. , 1988, Clinical orthopaedics and related research.

[3]  L. Whiteside,et al.  The effect of patellar button placement and femoral component design on patellar tracking in total knee arthroplasty. , 1992, Clinical orthopaedics and related research.

[4]  W. Healy,et al.  Patellofemoral complications following total knee arthroplasty. Correlation with implant design and patient risk factors. , 1995, The Journal of arthroplasty.

[5]  S. Verhulst,et al.  Patellar tilt in total knee arthroplasty. , 1996, American journal of orthopedics.

[6]  J. N. Grace.  Patellar insatability after total knee arthroplasty , 1988 .

[7]  J. N. Grace,et al.  Patellar instability after total knee arthroplasty. , 1988, Clinical orthopaedics and related research.

[8]  R. Wittmann,et al.  Results of total knee arthroplasty with a metal-backed patellar component. A 6-year follow-up study. , 1996, The Journal of arthroplasty.

[9]  V. Goldberg,et al.  Effect of Femoral Component Rotation and Patellar Design on Patellar Forces , 1997, Clinical orthopaedics and related research.

[10]  L. Dorr,et al.  Patellar tilt and subluxation in total knee arthroplasty. Relationship to pain, fixation, and design. , 1993, Clinical orthopaedics and related research.

[11]  L. Whiteside,et al.  Femoral rotational alignment, based on the anteroposterior axis, in total knee arthroplasty in a valgus knee. A technical note. , 1995, The Journal of bone and joint surgery. American volume.

[12]  S. Theiss,et al.  Component Design Affecting Patellofemoral Complications After Total Knee Arthroplasty , 1996, Clinical orthopaedics and related research.

[13]  K. An,et al.  Influence of lateral release on patellar tracking and patellofemoral contact characteristics after total knee arthroplasty. , 1997, The Journal of arthroplasty.

[14]  J D Reuben,et al.  The effect of femoral component position on patellar tracking after total knee arthroplasty. , 1990, Clinical orthopaedics and related research.

[15]  A. Lombardi,et al.  Fracture/dissociation of the polyethylene in metal-backed patellar components in total knee arthroplasty. , 1988, The Journal of bone and joint surgery. American volume.

[16]  G. Huber,et al.  Medialization of the patella in total knee arthroplasty. , 1997, The Journal of arthroplasty.

[17]  L. Whiteside,et al.  Patellofemoral joint after total knee arthroplasty. Effect on contact area and contact stress. , 1997, The Journal of arthroplasty.

[18]  L. S. M. Gomes,et al.  Patellar prosthesis positioning in total knee arthroplasty , 1988 .

[19]  H. Labelle,et al.  The abnormal lateral patellofemoral angle: a diagnostic roentgenographic sign of recurrent patellar subluxation. , 1978, The Journal of bone and joint surgery. American volume.

[20]  J. J. Jacobs,et al.  Malrotation Causing Patellofemoral Complications After Total Knee Arthroplasty , 1998, Clinical orthopaedics and related research.

[21]  L. Whiteside,et al.  The effects of axial rotational alignment of the femoral component on knee stability and patellar tracking in total knee arthroplasty demonstrated on autopsy specimens. , 1993, Clinical orthopaedics and related research.

[22]  L Blankevoort,et al.  Influence of soft structures on patellar three-dimensional tracking. , 1994, Clinical orthopaedics and related research.

[23]  J E Bechtold,et al.  Patellar prosthesis positioning in total knee arthroplasty. A roentgenographic study. , 1988, Clinical orthopaedics and related research.

[24]  R Nagamine,et al.  Patellar tracking measurement in the normal knee , 1995, Journal of orthopaedic research : official publication of the Orthopaedic Research Society.

[25]  R. Nelissen,et al.  The influence of the position of the patellar component on tracking in total knee arthroplasty , 2004, International Orthopaedics.

[26]  R Huiskes,et al.  The three‐dimensional tracking pattern of the human patella , 1990, Journal of orthopaedic research : official publication of the Orthopaedic Research Society.