Patellar tracking in total knee arthroplasty: Inset versus onset design

Kace A. Ezzet, Allen L. Hershey, Darryl D. D'Lima, Steve E. Irby, Kenton R Kaufman, Clifford W. Colwell

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

Patellar components come in onset and inset designs. Kinematic differences between these designs were studied in a cadaver model of closed kinetic chain knee extension. Seven frozen knees were implanted with a standard posterior cruciate-retaining design. Each knee first was tested with the inset design, followed by the onset design in the Oxford Knee Rig. Three-dimensional tracking of the femur, tibia, and patella was performed using an electromagnetic system during active knee extension under load. No statistically significant differences were seen in knee kinematics between the 2 designs. The inset patella tended to shift laterally and tilt laterally more than the onset patella. This difference may be clinically significant.

Original languageEnglish (US)
Pages (from-to)838-843
Number of pages6
JournalJournal of Arthroplasty
Volume16
Issue number7
DOIs
StatePublished - 2001
Externally publishedYes

Fingerprint

Knee Replacement Arthroplasties
Knee
Patella
Biomechanical Phenomena
Electromagnetic Phenomena
Tibia
Cadaver
Femur

Keywords

  • Inset patella
  • Kinematics
  • Onset patella
  • Patellar design
  • Patellar tracking
  • Total knee arthroplasty

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine
  • Surgery

Cite this

Ezzet, K. A., Hershey, A. L., D'Lima, D. D., Irby, S. E., Kaufman, K. R., & Colwell, C. W. (2001). Patellar tracking in total knee arthroplasty: Inset versus onset design. Journal of Arthroplasty, 16(7), 838-843. https://doi.org/10.1054/arth.2001.25499

Patellar tracking in total knee arthroplasty : Inset versus onset design. / Ezzet, Kace A.; Hershey, Allen L.; D'Lima, Darryl D.; Irby, Steve E.; Kaufman, Kenton R; Colwell, Clifford W.

In: Journal of Arthroplasty, Vol. 16, No. 7, 2001, p. 838-843.

Research output: Contribution to journalArticle

Ezzet, KA, Hershey, AL, D'Lima, DD, Irby, SE, Kaufman, KR & Colwell, CW 2001, 'Patellar tracking in total knee arthroplasty: Inset versus onset design', Journal of Arthroplasty, vol. 16, no. 7, pp. 838-843. https://doi.org/10.1054/arth.2001.25499
Ezzet, Kace A. ; Hershey, Allen L. ; D'Lima, Darryl D. ; Irby, Steve E. ; Kaufman, Kenton R ; Colwell, Clifford W. / Patellar tracking in total knee arthroplasty : Inset versus onset design. In: Journal of Arthroplasty. 2001 ; Vol. 16, No. 7. pp. 838-843.
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