A statistical treatment of fatigue of the cast Co-Cr-Mo prosthesis alloy.
Fatigue tests have been conducted on commercially produced cast Co-Cr-Mo alloy in tension-tension while surrounded by a physiological solution at 37 degrees C. The data have been analyzed by statistical techniques to yield an allowable stress such that there is 95% confidence of less than one failure in 1,000 after 5 X 10(7) cycles of stress fluctuation. These results are valid for a substantially sounder material than may be common in commercial use and therefore a more conservative allowable stress probably ought to be used for design purposes.
D000497:Alloys; D002858:Chromium Alloys; D006621:Hip Joint; D007595:Joint Prosthesis; D008982:Molybdenum; D019736:Prostheses and Implants; D013223:Statistics as Topic; D013314:Stress, Mechanical; D013499:Surface Properties
D000497:Alloys; D002858:Chromium Alloys; D008982:Molybdenum