Lateral patellar facet impingement after primary total knee arthroplasty: It does exist

O. Brant Nikolaus, Dirk R. Larson, Arlen D. Hanssen, Robert T. Trousdale, Rafael J. Sierra

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


The existence of the diagnosis "lateral patellar facet impingement" (LPFI) is controversial and the outcomes for surgical revision for symptomatic LPFI uncertain. We found that of the 3361 index knee revisions performed at our institution from 1995 to 2008, eleven were done for symptomatic LPFI. Their clinical histories and radiographic imaging were reviewed before and after revision TKA and were also compared to a group of control patients. We found no statistically significant differences between the groups in preoperative KS pain and function scores or radiographic features. However, the combined findings of pain in the subpatellar/lateral aspect of the knee post TKA and radiographic lateral facet contact were significantly associated with revision due to LPFI. Surgical revision results were variable, but. ~. 2/3 of the patients were satisfied with the operation and had a significant improvement in KS function scores.

Original languageEnglish (US)
Pages (from-to)970-976
Number of pages7
JournalJournal of Arthroplasty
Issue number5
StatePublished - May 2014


  • Lateral patellar facet impingement (LPFI)
  • Patellofemoral joint
  • Total knee arthroplasty

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine


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