Dental implants should never hurt when in function or after placement and complete healing. Rather you never feel a dental implant in the jaws. If done and maintained properly, you would never feel or even be able to see your dental implant. Dental implants are not connected with any nerve to the jaws. Thus they can never be painful. They may only hurt if something is wrong with them. That unfortunately is when they are about to fail. Although, such failures are rare (about 2-3%), pain during failure is further a distant possibility. Most of the times if an implant fails, it simply loosens from the bone without you feeling a thing.