A glenoid component for coupling to a scapula of a subject includes a body. The body includes an articulation surface adapted to articulate with a humeral component, and the body further includes a distal surface adapted to face the glenoid of the scapula. The distal surface includes a base surface portion adapted to face a first portion of the glenoid. The distal surface further includes an augmented surface portion adapted to face a second portion of the glenoid. The base surface portion and the augmented surface portion define an obtuse angle therebetween.

A method of preoperative planning comprises creating a virtual model of a native patient tissue; placing a virtual device into a desired device orientation relative to the virtual model of the native patient tissue; specifying at least one structural change to the native patient tissue to facilitate placement of the virtual device in the desired device orientation; creating a virtual model of an altered patient tissue responsive to the specifying at least one structural change to the native patient tissue; and fabricating a tangible representation of a bone using the virtual model of the altered patient tissue.

A patient specific shoulder guide is provided that includes a plurality of peripheral members coupled with a peripheral body. The peripheral members have a patient specific contact surface. An open space (e.g., a single open space) is or can be provided radially between a central channel and an inner periphery of the peripheral body. The open space(s) can extend from a side of a spoke to another side of the same or a different spoke. The spoke can be a single spoke in some embodiments. The single open space can extend more than 120 degrees between circumferential ends of the open space.

A humeral head implant system includes a head component including a first articulating surface, a second bottom surface extending from the first spherical articulating surface, a first cavity extending a first distance into the head component from the second bottom surface, and a second cavity extending into the head component along a cavity axis. The head component defines a head axis extending through a center of the first articulating surface parallel to the cavity axis. A base component defines a slot extending from a first width to a second width. An insert component includes an insert body, a first engagement feature, and a slot engagement feature. The first engagement feature is received in the second cavity along the cavity axis. The insert body has an insert thickness less than the first distance, and the slot engagement feature slides into the slot in a direction transverse to the cavity axis.

A method is disclosed for making a glenoid guide that includes obtaining scapula surface profile information of a specific patient, providing a manufacturing plan for making the glenoid guide having at least one patient specific contact surface configured to contact a portion of the glenoid rim or glenoid surface and for making the guide having a rotation control feature forming member, and adapting the manufacturing plan to specify the location of the rotation control forming feature relative to a portion of the glenoid determined to benefit from augmentation based on the surface profile information.

A stemless implant for shoulder arthroplasty includes a body having a proximal portion, distal portion, and an outer surface. A cylindrical extrusion is substantially perpendicular to and adjacent the proximal portion. At least a portion of the outer surface is configured to contact bone, the outer bone contacting surface comprising a concave taper. The stemless implant can be sized and shaped for insertion into a metaphysis of a humerus bone without penetrating a diaphysis of the humerus bone. The implant optionally comprises a medial fin, a lateral fin, an anterior fin, and a posterior fin. The medial fin and lateral fin may be thicker than the anterior fin. The fins may taper from the proximal portion to the distal portion.

A patient specific glenoid guide is provided to facilitate properly aligned implantation of a glenoid prosthesis into a patient. The guide shape is designed preoperatively based on the unique configuration of the scapula of the patient. The guide orientation is chosen preoperatively based on one or more of the bone structure of the patient, the wear pattern of the patient's glenoid cavity, the anchoring means of the glenoid prosthesis, or other aspects.

A system and method for detecting and measuring changes in angular position with respect to a reference plane is useful in surgical procedures for orienting various instruments, prosthesis, and implants with respect to anatomical landmarks. One embodiment of the device uses dual orientation devices of a type capable of measuring angular position changes from a reference position. One such device provides information as to changes in position of an anatomical landmark relative to a reference position. The second device provides information as to changes in position of a surgical instrument and/or prosthesis relative to the reference position.

A glenoid component in one embodiment includes a base component with a planar upper circular rim defining a first plane, a receptacle opening to the first plane, and a lower planar circular surface defining a second plane parallel to the first plane. An articulating component of the glenoid component includes an upper articulating surface, a lower cylindrical coupling portion configured to be inserted into the receptacle, and an overhang portion located above the lower cylindrical coupling portion and beneath the upper articulating surface. The overhang portion includes a planar lower surface extending outwardly from the lower cylindrical coupling portion and configured to abut the planar upper circular rim of the base component when the articulating component is coupled to the base component.

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