To dream of a prosthetic limb represents make-shift ideas or habits. Feeling that you can’t do what you really want in your life, but can do other things to “get through” a situation. Settling on less powerful alternatives to support normal function in your life. Feeling that certain choices are only good enough and not what you really want.
Positively, a prosthetic limb may represent a willingness to do anything to achieve a goal. Putting up with embarrassment or unpleasant compromises to make sure you win.
Negatively, a prosthetic limb may represent desperation to continue bad habits.