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Newman’s Hip Prosthesis (Down Bros. and Mayer & Phelps)

Health Sciences · Robert W. Jackson Arthroscopy

A white cardboard box with an off-white label on the lid contains a hip prosthesis made primarily of clear perspex.

The prosthesis consists of a “ball” element attached to a tapered “femoral” stem. The prosthesis is a single solid piece. A metal reinforcement is visible within the clear stem. A pattern of metal wires are visible within the clear ball element. These are x-ray markers that will indicate whether the device has rotated after installation.

The box also contains a folded paper informational sheet.

Accession Number: 2023.JAC.282

Alternative Name:

Primary Materials: Perspex (Acrylic)


The label on the lid of the box includes the following information: “NEWMAN’S HIP PROSTHESIS// WITH TRIFIN NAIL STEM// HEAD 47mm// STEM 7[label damaged]mm// GUTTER 40mm.”

Stamped on a portion of the metal reinforcement that is visible within the clear ball: “47”, “6 cm”, “DOWN-MAYER”, “PAT. PEND”.

Dimensions (cm):

Box: Height = 5.2. Width = 11.5, Length = 5.5.


This prosthesis appears similar in form and purpose to the Judet acrylic prosthesis. It is installed transversally through the lateral cortex of the femur. (Miller 2002, 214)


The prosthesis appears to be unused and undamaged.

Associated Instruments:


Down Bros. and Mayer & Phelps Ltd., London, UK.

Date of Manufacture: Mid 20th c.


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:

Dane Miller. “Orthopaedic product technology during the second half of the twentieth century.” IN The Evolution of Orthopaedic Surgery. 211-225. Edited by Leslie Klenerman. London: Royal Society of Medicine Press, 2002.

Historical Notes:

  • Donated to UTSIC