This technology replaced gold alloy with vitallium and was popular in depression time.
2.
The original prosthesis he designed was a proximal femoral replacement, with a large fixed head made of the cobalt-chrome alloy Vitallium.
3.
He learned about a cobalt-chromium alloy called vitallium, which had been used by an orthopedic surgeon to repair hip fractures, and adapted it for tooth implantation.