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Related Experiment Video

Updated: Jun 9, 2026

Treatment of Ankle Osteoarthritis with Total Ankle Replacement Through a Lateral Transfibular Approach
09:01

Treatment of Ankle Osteoarthritis with Total Ankle Replacement Through a Lateral Transfibular Approach

Published on: January 24, 2018

Sagittal alignment changes predict patellar osteosclerosis after total knee arthroplasty without resurfacing.

Shunsuke Utsumi1, Takashi Aki1, Yu Mori1

  • 1Department of Orthopaedic Surgery Tohoku University Graduate School of Medicine Sendai Japan.

Journal of Experimental Orthopaedics
|June 8, 2026
PubMed
Summary

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Reductions in posterior tibial slope (PTS) and femorotibial posterior overhang (FTPO) after total knee arthroplasty (TKA) are linked to patellar osteosclerosis. Avoiding excessive PTS reduction and femoral anteriorization may help reduce patellofemoral joint stress.

Area of Science:

  • Orthopedic Surgery
  • Biomedical Engineering
  • Radiology

Background:

  • Total knee arthroplasty (TKA) effectively treats knee osteoarthritis.
  • Anterior knee pain post-TKA can be linked to patellofemoral (PF) loading.
  • Patellar osteosclerosis on radiographs may indicate increased PF stress.

Purpose of the Study:

  • To investigate the association between changes in posterior tibial slope (PTS) and femorotibial posterior overhang (FTPO) and the development of patellar osteosclerosis after TKA without patellar resurfacing.

Main Methods:

  • Retrospective review of 94 knees (71 patients) undergoing TKA without patellar resurfacing.
  • Classification of knees based on post-operative patellar osteosclerosis.
  • Statistical analysis including Mann-Whitney U test, Spearman's correlation, ROC analysis, and multivariable logistic regression.
Keywords:
femorotibial posterior overhangpatellar osteosclerosispatellofemoral jointposterior tibial slopetotal knee arthroplasty

Related Experiment Videos

Last Updated: Jun 9, 2026

Treatment of Ankle Osteoarthritis with Total Ankle Replacement Through a Lateral Transfibular Approach
09:01

Treatment of Ankle Osteoarthritis with Total Ankle Replacement Through a Lateral Transfibular Approach

Published on: January 24, 2018

Main Results:

  • Patellar osteosclerosis occurred in 27.7% of knees.
  • The osteosclerosis group exhibited significantly greater post-operative reductions in PTS and FTPO (p < 0.001).
  • Reduced PTS (≤ -0.28°) and smaller FTPO (≤ 0.68 mm) independently predicted patellar osteosclerosis.

Conclusions:

  • Post-operative reductions in PTS and femoral anteriorization are associated with patellar osteosclerosis after TKA.
  • These sagittal alignment changes may increase PF joint stress and anterior knee pain.
  • Minimizing excessive PTS reduction and femoral anteriorization could help reduce PF overloading.