Article by Robert F. Cathcart, M.D. as an Orthopaedic Surgeon.
- New Ideas in the Design and Function of the Austin Moore Prosthesis. Orthopaedic Review. Vol. II, No. 3, March 1973. (Give this link lots of time for download because it is in PDF format.)
- This is the article that documents that the femoral head is not a sphere and that the out-of-round shape of the femoral head should be considered in the design of hemi-hip replacement endoprostheses to prevent idiopathic sinkage of the prosthesis head into the acetabulum. The implications of increasing sphericity as one of the first steps in idiopathic degenerative arthritis of the hip is discussed.
- Pictures taken at dissections at Stanford Medical School by Cathcart during orthopaedic surgery residency in 1959 (PDF format)
- These pictures demonstrate the normal femoral head as being out-of-round and the early degenerative hips as being more spherical than normal. These dissections lead to the design of the more normally shaped hemi-hip replacement prosthesis, ("the Cathcart prosthesis"}, and the idea that a sphere is a pathologic shape. Normal animal joints must not be surfaces of revolution.