title: Instrumented implant for measuring tibiofemoral forces.
abstract: Experimental measurement of loads occurring in the human knee joint will allow validation of analytical models and provide data for the design of total knee implants. A customized transducer was developed to measure the dynamic tibiofemoral force and center of pressure after total knee arthroplasty. The transducer consists of a standard tibial component to which four uniaxial load cells and an additional tibial tray have been added. The transducer was calibrated using a loading device traceable to the National Institute of Standards and Technology (NIST). The transducer was accurate to within 1% in magnitude, 0.07 mm in medial/lateral location and 0.24 m in anterior/posterior location.
authors.affiliation: Motion Analysis Laboratory Children's Hospital, San Diego, California 92123, USA.
authors.forename: K R
authors.initials: KR
authors.lastname: Kaufman
authors.forename: N
authors.initials: N
authors.lastname: Kovacevic
authors.forename: S E
authors.initials: SE
authors.lastname: Irby
authors.forename: C W
authors.initials: CW
authors.lastname: Colwell
mesh_terms: D002138:Calibration; D004867:Equipment Design; D005269:Femur / Q000502:physiology*; D006801:Humans; D007595:Joint Prosthesis; D007719:Knee Joint / Q000502:physiology; D011312:Pressure; D011474:Prosthesis Design; D015203:Reproducibility of Results; D013314:Stress, Mechanical; D013977:Tibia / Q000502:physiology*; D014159:Transducers