The ROBODOC system was designed to address potential human errors in performing cementless total hip replacement. The system consists of a preoperative planning computer workstation (called ORTHODOC) and a five-axis robotic arm with a high speed milling device as an end effector. The combined experience of the United States Food and Drug Administration… (More)
This paper describes an ongoing project to develop a computer-integrated system to assist surgeons in revision total hip replacement (RTHR) surgery. In RTHR surgery, a failing orthopedic hip implant, typically cemented, is replaced with a new one by removing the old implant, removing the cement and fitting a new implant into an enlarged canal broached in… (More)
A gap with variable geometry is presented for both cantilever beam and fixed-fixed beam actuators as a method to reduce the pull-in voltage while maintaining a required displacement. The method is applicable to beams oriented either in a plane parallel to or perpendicular to a substrate, but is most suitable for vertically oriented (lateral) beams… (More)
The kinematics of the knee joint is considered with the special regard to the cruciate ligaments. An optimum place for the fixation of ligament substitute is calculated. Anatomic preparations of cadaver knee joints proved this predictions to be correct. Placing the ligament substitute at this place the ligaments behave isometrically.
A possible involvement of the VIII cranial nerve in Multiple Sklerosis was investigated. 15 of the 135 MS-patients were tested by evoked response audiometry (ERA) and vestibular examinations. Only a central nystagmus, central vertigo and coordination disorder were seen. Lesions of the peripheral vestibular system and pathological data of the evoked response… (More)