A partial ankle prosthesis includes a tibial component including a superior surface configured to be attached to a lower end of a patient's tibia; a poly component that is fixedly attached to the tibial component and includes a concave inferior surface of an anti-friction material; and a talar component including an inferior surface configured to be attached to a patient's talus and a single convex superior surface configured to mate with the inferior surface of the poly component; and the partial ankle prosthesis is configured to be implanted in a single compartment of a patient's ankle.

An apparatus includes a body extending from a first end to a second end. The first end is a leading end, and the second end includes a first coupling element configured to couple the body to a first other component. The body includes an external fixation element extending along a length of the first component. The external fixation element is configured to engage bone. Systems and methods are also disclosed.

Provided is a novel joint replacement prosthesis that includes a base component, and one or more modular stems. The base component includes a bone-facing surface including one or more stem connectors configured for receiving and forming connections with the one or more modular stems inserted from the bone-facing surface side.

A method of ankle replacement includes forming an anterior cut in a bone and forming a stem hole in a distal end of the bone. The stem hole is formed using a plurality of broaches positioned against the distal end of the bone through the anterior cut. A first portion and a second portion of a stem implant are inserted into the stem hole through the anterior cut in the bone. The first portion is coupled to the second portion using a coupling device inserted through the anterior cut in the bone. The stem implant is impacted into the stem hole using an offset impactor.

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

System, including apparatus and methods, for ankle fusion using a device for separating a first bone and a second bone of an ankle region. In some embodiments, the device may comprise an expandable spacer including first and second bone-contacting surface regions facing away from one another and configured to be abutted with the first and second bones, respectively. A distance between the first and second bone-contacting surface regions may be adjustable to change the separation of the first and second bones. The first bone-contacting surface region may correspond to a portion of a sphere and may be configured to be disposed at least partially in a concavity formed surgically in the first bone. The expandable spacer offers improved control over the length of the lower limb and the orientation of the foot during ankle fusion surgery.

An ankle prosthesis is provided that includes a tibial stem with a retractable member configured to be controllably movable between a retracted position and an extended position so that in the extended position the retractable member engages the surface of the bone that defines an intramedullary canal so as to enhance anchoring of the tibial stem within the tibia.

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

A device including a delivery port and a method of delivering a material via a delivery port is disclosed. The device includes a body extending between a proximal surface and a distal surface. The body is sized and configured to be coupled to an anatomical structure at an implantation site. A first inlet port is formed in a distal surface of the body and is sized and configured to receive a first material. A first outlet port is formed in the proximal surface of the body. The first outlet port is coupled to the first inlet port by a first fluid path defined by the body and the first outlet port is sized and configured to provide the first material to a first predetermined location when the body is coupled to the anatomical structure.

Proposed is an artificial ankle joint bearing element in which a contact area of the bearing element with a talus element is increased such that stress is evenly distributed during bearing movement of the bearing element on the talus element and wear of the bearing element is reduced under the same load; the bearing element has a front and a rear convexly formed to increase a contact area with a tibial element and distribute stress; and the front and rear of the bearing element are asymmetrically formed such that the rear thereof is formed to have a smaller height than the front thereof so as to facilitate the insertion of the bearing element into space between the talus element and the tibial element from an anterior side thereof during artificial ankle joint surgery.