A method for performing a surgical procedure on a patient using a robotic system and a navigation system. The robotic system includes a cutting tool. The navigation system has at least one locating device to track a portion of the patient during the surgical procedure. The navigation system provides information as to a position of the portion of the patient. An optical cutting guide is projected onto the portion of the patient to enable cutting of the portion of the patient with the cutting tool of the robotic system while the optical cutting guide is projected onto the portion of the patient.

Rasps for preparing bones of various patients to receive a prosthetic implant and a method for using the same. Multiple rasps may be provided as a set. Within the set, the rasps generally correspond to the size and shape of a single prosthetic implant, such as a prosthetic femoral hip stem, and have a range of bone removal and bone compression capabilities to account for unique bone characteristics of the various patients. A surgeon may select a desired rasp from the set provided depending on the patient's unique bone characteristics.

A cutting device is provided that includes a pair of cutting blades joined at a pivot point. The cutting blades are driven by an actuator to cause the cutting blades to pivot about the pivot point. The cutting device is configured to remove material underneath a surface of an implant installed on a bone during a revision arthroplasty procedure. The cutting device may travel along a length of the bone just underneath the surface of the implant to remove material and free the implant from the bone. A method for removing material underneath a surface of an implant installed on the bone is also provided. A system for removing material underneath the surface of an implant installed on the bone with the cutting device is also provided.

Trephine reamers that include a body with a hollow interior sized to receive a femoral component. A distal end of the body includes one or more teeth shaped for cutting the femur. Valleys are positioned between the teeth. The valleys accommodate the cut bone and prevent and/or reduce interference with the cutting teeth. Thus, a single trephine reamer is able to cut a greater amount of bone. Methods of cutting the femur including positioning the trephine reamer over the femoral component, and rotating the reamer such that the teeth cut the bone that extends around the component. The reamer moves along the length of the component during the cutting thus allowing for removal of the component.

Disclosed herein are linear electric surgical hammer impact tools and methods of use thereof. The linear electric surgical hammer impact tools can include a housing, a slider, a shuttle, and a motor. The housing can define a cavity extending along a longitudinal axis of the housing. The slider can be located inside the cavity and arranged along the longitudinal axis of the housing. The shuttle can be located inside the cavity and arranged along the longitudinal axis of the housing. The shuttle can include a first set of collars and a second set of collars. The motor can be configured to drive the slider along the longitudinal axis in a first direction and a second direction. Motion of the slider in the first and second directions can cause the slider to contact the first and second sets of collars.

A medical device for implantation in a hip joint of a human patient, the natural hip joint having a ball shaped caput femur as the proximal part of the femoral bone with a convex hip joint surface towards the center of the hip joint and a bowl shaped acetabulum as part of the pelvic bone with a concave hip joint surface towards the center of the hip joint. The medical device comprising; an artificial caput femur, comprising a convex surface towards the center of the hip joint. The artificial convex caput femur is adapted to, when implanted: be fixated to the pelvic bone of the human patient, and be in movable connection with an artificial acetabulum surface fixated to the femoral bone of the patient, thereby forming a ball and socket joint. The medical device further comprises a fixation element comprising a fixation surface adapted to be in contact with the surface of the acetabulum and adapted to fixate the artificial convex caput femur to at least the acetabulum of the pelvic bone.

A partial hip prosthesis for reducing friction and wear in partial hip prosthesis by combining optimized geometry of the articulation and surface treatment of the prosthetic component. In the prosthesis, one of the articulating surfaces—either that of the reamed acetabulum, or that of the femoral head prosthesis is a-spherical so that a fluid-filled gap is formed at the area of major load transfer. The fluid-filled gap is sealed by an annular area of contact, over which the concave and the convex components are congruent. A prosthetic head is fixed to the femur by either a conventional stem, a perforated shell, or a femoral neck prosthesis screwed onto the femur so that it is partially covered by bone and partially exposed on the medial-inferior aspect, where it abuts the reamed cortex of the calcar region.

A system and method for improving installation of a prosthesis, particularly an acetabular cup. The system and method may include implementation of a constant velocity relative motion between a prosthesis and an installation site. For example, an installation system may be fixed relative to the installation site, with the prosthesis fixed into an initial position. The prosthesis is moved at constant speed (i.e., with minimal if any acceleration or applied impulses) relative to the installation site. That is, one or both of the prosthesis or the installation site may be in motion. Resistive forces to installation of a prosthesis may thus be reduced by maintaining the prosthesis constantly in motion relative to the installation site. Securing a processing/implanting tool directly to the installation site may offer advantages.

An implant removal tool (1) used to remove a femoral implant (17) from a femur bone (18) by providing a substantially U-shaped body (2) having a substantially rectangular-shaped opening (9) located thereon that allows the substantially U-shaped body to be placed over a neck (21) of a femoral implant so a sharpened front edge (5) of the substantially U-shaped body makes direct contact with an inner surface of the stein of the femoral implant. The U-shaped body may have front side edges (26, 27) that extend beyond a front edge (5) to allow the front side edges to cut anterior and posterior surface of the implant.

Kits and methods for use in intraoperative trailing of hip prostheses to determine an appropriate length for the femoral neck component of a prosthetic hip joint, are described. A kit for use in selecting a femoral neck component of an orthopaedic joint prosthesis kit comprises a first (10) and a second (110) broach. Each of the first and second broaches has a neck connection element comprising a projection (12, 112) extending from a proximal surface (14, 114) of the broach, each projection having a length (L). The projection on the first broach has a different length than the projection on the second broach. The kit also includes a trial femoral neck (30) component having a neck connection element in the form of a recess (36) in a distal surface (34). The recess is configured to mate with the projection on each of the first or second broaches such that mating of the trial femoral neck component with the first broach provides an assembly with a first neck length, and the mating of the trial femoral neck component with the second broach provides an assembly with a second neck length.