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Effects of patellofemoral overstuffing on knee flexion and patellar kinematics following total knee arthroplasty: a cadaveric study.

Publication ,  Journal Article
Bracey, DN; Brown, ML; Beard, HR; Mannava, S; Nazir, OF; Seyler, TM; Lang, JE
Published in: Int Orthop
September 2015

PURPOSE: The purpose of this study was to test the hypothesis that overstuffing the patellofemoral joint during total knee arthroplasty (TKA) would decrease passive knee flexion and alter patellar kinematics during knee flexion. METHODS: Ten cadaveric knees were implanted with cruciate-retaining TKAs, and the patellofemoral joint was overstuffed in 2-mm increments with custom-augmented patellar prostheses (+2 mm through +8 mm). Changes to knee flexion, patellar shift, tilt and rotation were measured with an imageless optical-tracking computer navigation system. RESULTS: Knee flexion decreased an average 1.2° with each additional 2 mm of patellar thickness. Compared with control TKA (+0 mm), no significant decrease in knee flexion was detected until the patellofemoral joint was overstuffed with the +8-mm patellar prosthesis. Kinematic tracking data showed significantly greater lateral shift of patella with the +6- and +8-mm prostheses and significantly greater lateral tilt with the +8-mm prosthesis. Overstuffing had no appreciable effect on patellar rotation. CONCLUSIONS: Passive knee flexion after TKA is significantly reduced when overstuffing the patellofemoral joint by +8 mm, and patellofemoral kinematics are altered when overstuffing the joint by +6 mm. These results demonstrate the relatively modest effects of patellofemoral overstuffing on knee flexion and patellar tracking kinematics after TKA.

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Published In

Int Orthop

DOI

EISSN

1432-5195

Publication Date

September 2015

Volume

39

Issue

9

Start / End Page

1715 / 1722

Location

Germany

Related Subject Headings

  • Surgery, Computer-Assisted
  • Range of Motion, Articular
  • Patellofemoral Joint
  • Patella
  • Orthopedics
  • Middle Aged
  • Male
  • Knee Prosthesis
  • Knee Joint
  • Humans
 

Citation

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ICMJE
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Bracey, D. N., Brown, M. L., Beard, H. R., Mannava, S., Nazir, O. F., Seyler, T. M., & Lang, J. E. (2015). Effects of patellofemoral overstuffing on knee flexion and patellar kinematics following total knee arthroplasty: a cadaveric study. Int Orthop, 39(9), 1715–1722. https://doi.org/10.1007/s00264-015-2715-9
Bracey, Daniel N., Matthew L. Brown, Hoyt R. Beard, Sandeep Mannava, Omar F. Nazir, Thorsten M. Seyler, and Jason E. Lang. “Effects of patellofemoral overstuffing on knee flexion and patellar kinematics following total knee arthroplasty: a cadaveric study.Int Orthop 39, no. 9 (September 2015): 1715–22. https://doi.org/10.1007/s00264-015-2715-9.
Bracey DN, Brown ML, Beard HR, Mannava S, Nazir OF, Seyler TM, et al. Effects of patellofemoral overstuffing on knee flexion and patellar kinematics following total knee arthroplasty: a cadaveric study. Int Orthop. 2015 Sep;39(9):1715–22.
Bracey, Daniel N., et al. “Effects of patellofemoral overstuffing on knee flexion and patellar kinematics following total knee arthroplasty: a cadaveric study.Int Orthop, vol. 39, no. 9, Sept. 2015, pp. 1715–22. Pubmed, doi:10.1007/s00264-015-2715-9.
Bracey DN, Brown ML, Beard HR, Mannava S, Nazir OF, Seyler TM, Lang JE. Effects of patellofemoral overstuffing on knee flexion and patellar kinematics following total knee arthroplasty: a cadaveric study. Int Orthop. 2015 Sep;39(9):1715–1722.
Journal cover image

Published In

Int Orthop

DOI

EISSN

1432-5195

Publication Date

September 2015

Volume

39

Issue

9

Start / End Page

1715 / 1722

Location

Germany

Related Subject Headings

  • Surgery, Computer-Assisted
  • Range of Motion, Articular
  • Patellofemoral Joint
  • Patella
  • Orthopedics
  • Middle Aged
  • Male
  • Knee Prosthesis
  • Knee Joint
  • Humans