The effect of trochlear design on patellofemoral shear and compressive forces in total knee arthroplasty

W. J. Petersilge, C. S. Oishi, K. R. Kaufman, S. E. Irby, C. W. Colwell

Research output: Contribution to journalArticle

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Abstract

Biomechanical testing was performed on 5 candaveric knees to evaluate the effect of patellofemoral design on shear and compressive force at the patellar component-bone interface. Three patellofemoral designs with identical tibiofemoral articular surfaces were tested. The knees were tested under dynamic loading conditions from 0° to 100° flexion. A transducer that measured 3 orthogonal force components was mounted between the patellar component and the patella. The combination of an oval dome patella with a 2- mm deeper trochlear groove and associated increased femoral resection was compared with a biconcave patella with standard trochlea and normal femoral resection. Alignment of the trochlear groove in 7° valgus (anatomic) decreased medial-lateral shear by 10% to symmetric trochlear groove alignment.

Original languageEnglish (US)
Pages (from-to)124-130
Number of pages7
JournalClinical orthopaedics and related research
Issue number309
StatePublished - Jan 1 1994

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ASJC Scopus subject areas

  • Surgery
  • Orthopedics and Sports Medicine

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