An orthopedic surgical instrument comprising: a customized patient-specific acetabular reaming guide comprising an at least partially circular body, having an inner surface defining a slot sized to receive an acetabular reamer head, and further having a top surface defining a contact element; at least one support element configured for supporting the at least partially circular body on a patient-specific anatomy of a coxal bone; and further comprising at least one acetabular reamer head comprising a bone milling portion configured for insertion in the slot of the acetabular reaming guide; a connecting element configured for removable attachment to a reamer's shank for operation of the at least one acetabular reamer head; wherein the orthopedic surgical instrument further comprises an abutment element attached to a top portion at least one acetabular reamer head and configured to limit a milling depth of the bone milling portion, by resting on the contact element of the acetabular reaming guide.

Devices and methods for performing a surgical step or surgical procedure with visual guidance using an optical head mounted display are disclosed.

A surgical or arthroscopic method for resurfacing at least one surface of a hip joint of a human patient, using a medical device comprising an artificial hip joint surface, wherein the hip joint surface comprising an acetabulum surface and a caput femur surface, said method comprising the steps of: creating at least one hole passing into the hip joint, dissecting and preparing the hip joint, introducing at least one artificial hip joint surface, comprising at least one of an artificial acetabulum surface and an artificial caput femur surface, wherein said at least one artificial hip joint surface, comprising a first sealing member, creating a sealed hollow space between said first sealing member and one of the acetabulum surface or said artificial acetabulum surface and one of the caput femur surface or said artificial caput femur surface, selecting at least one artificial hip joint surface and injecting a material into said hollow space.

An orthopaedic surgical instrument assembly includes a hemispherical component having a convex outer surface extending from a circular rim to an apex point, and a plurality of cutting teeth extending outwardly from the outer surface between the circular rim and the apex point. Each cutting tooth of the plurality of cutting teeth includes an elongated cutting edge that is positioned on an arced imaginary line of a plurality of arced imaginary lines extending outwardly from the apex point of the hemispherical component. A method of manufacturing an orthopaedic surgical instrument assembly is also disclosed.

Apparatus for securing an object to bone, the apparatus comprising: an anchor assembly comprising an anchor and an actuation element extending from the anchor, wherein applying a force to the actuation element when the anchor is disposed in a hole formed in a bone secures the anchor to the bone; and an inserter for deploying the anchor assembly in a hole formed in a bone, the inserter comprising: a shaft for releasably engaging the anchor; and a force delivery mechanism mounted to the shaft and connected to the actuation element, the force delivery mechanism being constructed so as to receive an input force from an external source and to selectively apply an output force to the actuation element, with the force delivery mechanism being constructed so that the magnitude of the output force is limited regardless of the magnitude of the input force.

The present invention relates to an acetabular cup removing apparatus for an artificial hip joint. An acetabular cup removing apparatus for an artificial hip joint according to one embodiment of the present disclosure comprises: a main driving unit; a main shaft which is rotatable by a driving force of the main driving unit; a cutter unit which is disposed at a front end of the main shaft, tiltable along an acetabular portion into which an acetabular cup has been implanted, and cuts the acetabular portion while being rotated by the main shaft; and a stepless adjustment unit for steplessly adjusting a tilting angle of the cutter unit while continuously moving in a forward and backward direction relative to the main shaft.

A rotary surgical assembly is disclosed. The assembly has a plurality of cutting teeth (216), a hollow dome (200) and a spindle (10). The hollow dome has a pole having a pole axis X, and a cutting surface featuring some of the cutting teeth. The cutting surface includes a curved part (214) and a substantially flat part (212) proximal the pole with an aperture (210) extending therethrough. The spindle has a proximal end (12) and a distal end (14) including a spindle mounting element (16). The spindle mounting element is secured to the dome beneath the substantially flat part of the cutting surface. The spindle mounting element has a cutting tooth (22) that extends distally through the cutting surface's aperture to form one of the said plurality of cutting teeth. A kit, and methods of manufacturing the rotary surgical assembly are described also.

A device is provided, including a cutting rib, the cutting rib including an arcuate portion having an outer sharp edge and a centralizer configured to receive the cutting rib through a radial slot, the radial slot forming a gap with the cutting rib. The arcuate portion of the cutting rib is formed into a profile that follows a surface of the centralizer, the outer sharp edge of the arcuate portion of the cutting rib has a wavy profile that forms a tunnel in the gap between the centralizer and the cutting rib, and the outer sharp edge of the arcuate portion of the cutting rib protrudes outwardly from the surface of the centralizer. A method for using the device to cut bone in a surgical configuration is also provided.

Devices and methods for performing a surgical step or surgical procedure with visual guidance using an optical head mounted display are disclosed.

Described are systems, targets, and methods for registering a tool for use in optical tracking. A first target and a second target are attached to the tool, with the first target having a known spatial relationship to the tool or end effector of the tool. By determining a spatial feature of the first target and a pose of the second target, and using the known spatial relationship between the first target and the tool or end effector of the tool, a spatial relationship between the second target and the end effector can be determined. Subsequently the first target can be removed, and the end effector is trackable based on only tracking of the second target. In some implementations, the first target is removably couplable to the tool by the same interface by which the end effector is removably couplable to the tool.