Total knee post-cam design variations and their effects on kinematics and wear patterns

William Mihalko, Julie Lowell, Genymphas Higgs, Steven Kurtz

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Post-cam designs for posterior-stabilized total knee arthroplasy (TKA) implants have evolved over the last 2 decades. These designs have evolved from symmetric post and cam to asymmetric designs that include anterior post interactions to affect a kinematic change in full extension. All design changes have consequences on the resulting femorotibial contact kinematics and, depending on the amount of constraint built into the design, these changes may have significant consequences on the wear patterns on the tibial polyethylene insert. The current authors review the kinematic effects of symmetric and asymmetric cam designs and use a retrieval database of TKA implants obtained at the time of necropsy to show how different design variables may affect polyethylene wear patterns after 10 or more years of implantation or from modeled wear in simulators. More modern designs seem to have moved the post posteriorly and sloped the anterior aspect to avoid impingement of the anterior post in terminal flexion on the inferior aspect of the patella button.

Original languageEnglish (US)
Pages (from-to)S45-S49
JournalOrthopedics
Volume39
Issue number3
DOIs
StatePublished - May 1 2016

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Biomechanical Phenomena
Knee
Polyethylene
Patella
Databases

All Science Journal Classification (ASJC) codes

  • Orthopedics and Sports Medicine

Cite this

Total knee post-cam design variations and their effects on kinematics and wear patterns. / Mihalko, William; Lowell, Julie; Higgs, Genymphas; Kurtz, Steven.

In: Orthopedics, Vol. 39, No. 3, 01.05.2016, p. S45-S49.

Research output: Contribution to journalArticle

Mihalko, William ; Lowell, Julie ; Higgs, Genymphas ; Kurtz, Steven. / Total knee post-cam design variations and their effects on kinematics and wear patterns. In: Orthopedics. 2016 ; Vol. 39, No. 3. pp. S45-S49.
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