A talar implant system comprises a body. The body includes a bone contact surface and an articulation surface located opposite the bone contact surface. The body defines at least one angled fastener hole extending therethrough from the articulation surface to the bone contact surface along a longitudinal axis. The articulation surface is configured to mimic articulation of the talar dome. A fastener is sized and configured to be received within the at least one fastener hole at a first angle with respect to the longitudinal axis of the fastener hole. A fastener cap is sized and configured to be received within a proximal end of the at least one fastener hole. The fastener cap couples the body to the fastener.

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

The disclosed subject matter relates to a system and method for preparing a surface of a bone proximate a joint, in which the preparation includes boring a plurality of arced channels/troughs in the bone surface using an arch drill assembly guided by plural guide bores along a predetermined longitudinal arc. The bored troughs create a scalloped surface on the bone to which an inverse contoured joint insert/implant having cooperating convex ridges engages. The plural guide bores are also defined by the predetermined longitudinal arc which may be circular or helical. The disclosed subject matter minimizes bone removal and allows greater access options for preparing the bone surface.

A surgical positioning system including a rotation guide slide and a rotation guide pointer configured to be coupled to the rotation guide slide. The rotation guide pointer includes a base and a pointer extension. The base includes protrusion and a hole extending through the base and the protrusion where the protrusion is sized and configured to be received within a channel such that the rotation guide pointer can translate parallel to a plane defined by the first side of the rotation guide slide. The hole is sized and configured to receive a screw to fix the position of the rotation guide pointer relative to the rotation guide slide, with the protrusion configured to expand when the screw is advanced in the hole.

An implant is provided for use in an ankle joint between reconditioned end surfaces established on a distal end of an upper tibia bone and an opposing lower talus bone. The implant comprises a substantially porous rigid component adapted to be anchored against the upper tibia reconditioned end surface and the lower talus reconditioned end surface. The component defining an opening therethrough. An intramedullary nail is configured to pass through the opening in the component when the nail is driven through the talus and into the tibia.

A surgical positioning system including a rotation guide slide and a rotation guide pointer configured to be coupled to the rotation guide slide. The rotation guide pointer includes a base and a pointer extension. The base includes protrusion and a hole extending through the base and the protrusion where the protrusion is sized and configured to be received within a channel such that the rotation guide pointer can translate parallel to a plane defined by the first side of the rotation guide slide. The hole is sized and configured to receive a screw to fix the position of the rotation guide pointer relative to the rotation guide slide, with the protrusion configured to expand when the screw is advanced in the hole.

Hard-tissue implants are provided that include a bulk implant, a face, pillars, slots, and at least one support member. The pillars are for contacting a hard tissue. The slots are to be occupied by the hard tissue. The at least one support member is for contacting the hard tissue. The hard-tissue implant has a Young's modulus of elasticity of at least 3 GPa, and has a ratio of the sum of (i) the volumes of the slots to (ii) the sum of the volumes of the pillars and the volumes of the slots of 0.40:1 to 0.90:1. Methods of making and using hard-tissue implants are also provided.

Arthroplasty implant systems and procedures are disclosed herein. In an embodiment, an arthroplasty implant of an arthroplasty system includes a shape memory material connecting member attached to two points of fixation of the arthroplasty implant.

A system comprised of custom radiographically designed tibial and talar cutting guides, a tibial reaming guide and bit, and instrumentalities for use in total ankle replacement surgery and a computer-based system and method for making the custom radiographically designed tibial and talar cutting guides.

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