Health Sciences · Robert W. Jackson Arthroscopy · UTSIC
A metal artificial hip consisting primarily of a semi-hemispherical head element attached to a tapered stem. The two elements are rigidly joined by a friction fit joint with a cylindrical plug eon the lower surface of the ball fitting into a socket on the stem.
The outside surface of the ball has a high polish while the stem has a duller finish. The upper portion of the stem has a highly textured surface The stem has three small holes along the edge of the upper surface. These likely facilitate removal.
Accession Number: 2023.JAC.280
Alternative Name: Total Shoulder Arthroplasty
Primary Materials: Unknown Metal Alloy
Written in a slightly green tinted pigment at the tip of the peg on the lower surface of the ball: “A4X27// B// 249840”
Printed on faint letter on along the outer surface of the stem: “BIOMET 113703 Ti 6AL 4V 310800”
Printed on the stem opposite the previous text: “2MM STEM”
Dimensions (cm): Height = 15, Width – 4.5, length = 4.2.
This is a total shoulder arthroplasty, likely of the Neer type. This example is modular, meaning that different sizes of head and stem can be combined to better fit a patient.
This item is in good cosmetic condition and appears to be intact. There are light abrasions across the surface of the ball and stem. There is a brown residue on the textured upper portion of the stem.
Associated Instruments:
Manufacturer: Biomet, Inc., Warsaw, Indiana, 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.
University of Washington Orthopaedics & Sports Medicine. “Biomet Shoulder Prosthesis.” Webpage. (Archived 28 May, 2025).
Biomet was founded in November of 1977. In 2015, the company became part of Zimmer Biomet following its acquisition by Zimmer holdings.
Based on images on the webpage of the University of Washington Orthopaedics & Sports Medicine, this shoulder arthroplasty may be part of the Biomet Bio-Modular Choice Shoulder System.
- Donated to UTSIC