Health Sciences · Robert W. Jackson Arthroscopy
The tibial portion of a unicompartmental knee replacement consists of a metal tibial tray (2023.JAC.284.1) and a white plastic (HDPE) liner (2023.JAC.284.2). The liner has a slightly convex profile. The tray has two rounded studs at its base. There is a socket on the upper surface of the tray that matches a plug at the base of the liner. The tray has two small holes along the front edge, presumably to permit the use of an insertion tool or jig.
The artifact has signs of wear and remnants of bone cement, suggesting that it was removed from a patient.
Accession Number: 2023.JAC.284.1-2
Alternative Name:
Metal, Plastic (High-density polyethylene)
Tibial tray:
Printed in the recess on the top surface of the tibial tray: “R.B. UNI-LARGE”
Printed on the bottom surface of the tibial tray: “J&J// LARGE 6MM// A55H”
Dimensions (cm):
The knee replacement was introduced to address a number of knee ailments, especially severe arthritis. Partial knee replacement is used in cases in which damage is largely confined to one compartment of the knee.
This artifact represents the tibial component of a unicompartmental knee replacement. A corresponding femoral component may be missing. The item is in good cosmetic condition. It has light wear on its bearing surfaces and deposits of bone cement in deep recesses. It may have been removed from a patient and subsequently cleaned.
Associated Instruments:
Johnson & Johnson. New Brunswick, New Jersey, USA.
Date of Manufacture: c. 1990s
The Robert W. Jackson Arthroscopy Collection was acquired by the University of Toronto from Dr. Jackson’s family on November 12th, 2020.
Additional Information and References:
Historical Notes: