Hey Group, lately, a patient who had undergone Knee endoprothesis surgery asked me a question which seems rather funny, and since I am not a BIO-ENGINEER or prothesis developper, maybe someone in the group can share his toughts on this : CAN THE NORMAL MOVEMENT OF AN ENDOPROTHESIS (KNEE OR OTHER JOINT) CAUSE ELECTRICAL CHARGE DUE TO FRICTION ON THE SURFACES ? Thanks for your thoughts and ideas Erik Goossens PT - Switzerland %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%