A method of performing arthroplasty of an anatomical joint for receipt of an implant is disclosed. The method includes developing a preoperative plan, designing a patient specific guide based on the preoperative plan, obtaining the patient specific guide, placing the patient specific guide relative to the identified bone, fixing a pair of pins into the bone to establish an Alpha plane and executing the preoperative plan while referencing the Alpha plane. A desired amount of remaining first bone is determined based on a condition of the anatomical joint and a desired orientation of the implant. The patient specific guide includes a pair of bores defined therein and located in positions to accept a complementary pair of pins. The bores are arranged at locations on the patient specific guide to orient the respective pins in a direction optimized for surgeon access to the first bone and to establish the Alpha plane.

Apparatus for securing an object to bone, the apparatus including 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 including 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.

Hip joint navigation systems and methods are provided. In some embodiments, the systems and methods described herein determine a table reference plane that approximates the Anterior Pelvic Plane. In some embodiments, the systems and methods described herein measure a pre-operative and post-operative point. In some embodiments, the comparison of the pre-operative and post-operative point corresponds to changes in leg length and joint offset. In some embodiments, the systems and methods described herein determine an Adjusted Plane. In some embodiments, the Adjusted Plane adjusts for tilt by rotating the Anterior Pelvic Plane about the inter-ASIS line. In some embodiments, the Adjusted Plane improves correlation between navigated cup angles and post-operative images.

A patient-specific registration jig for registering an orthopaedic surgical instrument with a bony anatomy of a patient includes a head and an adaptor coupled to the head. The head includes a patient-specific contact surface configured to contact a portion of the patient's bony anatomy such that the head can be coupled to the patient's bony anatomy in a unique position. The adaptor includes an elongated shank having a first end coupled to the head and a second end and an adaptor end attached to the second end of the elongated shank. The adaptor end is configured to be received by a clutch of the orthopaedic surgical instrument. A method for registering the orthopaedic surgical instrument using the patient-specific registration jig is also disclosed.

A surgical guide system for guiding a surgical tool, comprising a body which comprises a first contact surface profiled to locate with a first anatomical surface of a first bone; and a second contact surface profiled to locate with a second anatomical surface of a second bone; wherein the body is configured, for a specified functional position of the first bone relative to the second bone, to simultaneously: locate the first contact surface with the first anatomical surface; locate the second contact surface with the second anatomical surface; and receive, or guide, a first fastener to fasten to the first bone, wherein at least one of the body and/or the first fastener forms a first reference to guide a first surgical tool to the first bone.

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.

An instrument for establishing orientation of a pelvic prosthesis comprises a hub, a first arm attached to and extending from the hub, and a second arm attached to and extending from the hub. The first and second arms define a nominal plane of the apparatus, and may extend from the hub at an angle relative to each other. Distances between the first and second legs and between the first and third legs are adjustable. The first, second, and third legs have tips, and the tips of the first, second, and third legs define a plane having a predefined geometric relationship to the nominal plane of the apparatus.

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.

A patient specific guide for hip replacement for patients undergoing hip replacement surgery. The guide works for correction of the acetabulum defects based on a finite element model, which detect the bone quality and guide the surgeons for the optimum screws trajectories. The guide surface reflects the acetabular morphology which provide a correct posting of the cup, especially for the complex case as bone loss, severe fractures and tumors. CT-scan images are used to construct the 3D model of the acetabulum bone, therefore a finite element and virtual surgery planning methods are applied to create the electronic file of the patient specific guide. In final step, the 3D printers are used to produce the patient specific guide.

An orthopedic guide that can comprise a base, a first attachment and a second attachment is disclosed. The base can have a plurality of connection features spaced from one another along a longitudinal extent. The base can be configured to seat on a rim of a bone. The first attachment can be selectively coupled to the base at a first end portion thereof and can be selectively coupled to the base at a second end portion thereof. The first attachment can be arch shaped when coupled to the base. The first attachment can define a first plurality of apertures. The second attachment can be selectively coupled to the base at a first end portion thereof and can be selectively coupled to the base at a second end portion thereof. The second attachment can be arch shaped when coupled to the base. The first attachment can define a second plurality of apertures.