Embodiments of the invention include a knee arthroplasty trialing system and method with a femoral component and a tibial trial that has one or more spacers and one or more articular trials. Some embodiments include spacers and articular trials that may be moved in and out of the joint space without significantly distracting the femoral component away from the tibial trial. Some spacers and trials are configured to be inserted and removed from a joint space substantially along an anterior-posterior axis.

An acetabular spacer device, of a type that is temporary and disposable, adapted to be implanted in use in a bone cavity placed at a joint of the human body, such as a hip or shoulder joint, has a cup-like shape, substantially hemispherical, and includes a first convex surface, adapted to be positioned at the bone cavity, a second concave surface, which defines a cavity, further includes at least one pharmaceutical or medical substance, such as at least one antibiotic, adapted to treat during use an ongoing infection in the bone cavity.

A method of forming a bone void for receipt of a prosthesis, comprising the steps of: inserting a stem of a reaming guide assembly into an intramedullary canal of a bone, the reaming guide assembly having first and second reamer guides disposed adjacent to each other, the first and second reamer guides being connected to an end of the stem; reaming the bone through the aperture of the first reamer guide to form a first bone void; inserting the lobe trial into the first bone void; and reaming the bone through the aperture of the second reamer guide to form a second bone void.

A method of treating a hip joint of a human patient using a pelvic drill comprising a driving member, a bone contacting and an operating device for operating said driving member. The method comprise the steps of cutting the skin of the human patient, dissecting an area of the pelvic bone on the opposite side from the acetabulum, creating a hole in said dissected area using said pelvic drill, said hole passing through the pelvic bone and into the hip joint of the human patient, and providing at least one hip joint surface to the hip joint, through said hole in the pelvic bone of the human patient. In one embodiment the method includes inserting a needle or tube like instrument into the patient's body for filling a part of the patient's body with gas and thereby expanding a cavity within the body.

An acetabular cage or device (100) is disclosed. In one embodiment, the acetabular cage includes a cup portion (110) configured for implantation in an acetabulum and a flange (120) extending from the cup portion. The flange including a first, bone contacting surface (126) configured to face bony tissue surrounding the acetabulum when the cup portion is implanted into the acetabulum and a second, top surface (127) opposite the first surface. The flange includes a flexible portion (130) and a fixation portion (122), the fixation portion including one or more fixation features (124) configured to facilitate fixation of the flange to the bony tissue surrounding the acetabulum. The flexible portion is arranged and configured to enable the flange, and hence the fixation portion, to move relative to the cup portion to facilitate placement of the flange relative to the bony tissue.

An implant couples a first bone of a hand to a second bone of the hand. The implant includes a body that defines a median plane. The body also defines a first joint surface having a first central region that articulates with the first bone. The body further defines a second joint surface having a second central region that articulates with the second bone, and the second central region is disposed on an opposite side of the median plane of the body relative to the first central region. The first and second central regions correspond to profiles of first and second axial segments, respectively, the first and second axial segments are each one of a cylinder, a cone and a torus and are centered on first and second axes, respectively, and the first and second axes, as projected on the median plane, are substantially perpendicular to each other.

Photodynamic devices for replacement of an articular head of a bone are provided. In an embodiment, a photodynamic device includes a photodynamic support member and an articular member attachable, either fixedly or removably, to the photodynamic support member and having a bearing surface. In an embodiment, the articular member includes a recess designed to receive the photodynamic support member. In an embodiment, the photodynamic support member includes an opening into which a shaft of the articular member can be inserted to attach the articular member to the photodynamic support member.

An implantable medical device for implantation in a hip joint is provided. The medical device comprises: at least one artificial hip joint surface adapted to replace at least the surface of at least one of the caput femur and acetabulum. At least one artificial hip joint surface comprises: a positioning hole with at least one opening in said at least one artificial hip joint surface. The hole is adapted to be placed and dimensioned such that the medical device is adapted to be fitted using a positioning shaft and at least partly surround the shaft, for positioning the at least one artificial hip joint surface in a desired position in the hip joint. The hole is adapted to be fitted using the positioning shaft, when the shaft is stabilized and placed in at least one of the femoral bone and the pelvic bone for positioning said medical device inside the hip joint.

A robotic system for preparing a bone to repair a bone fracture, includes a controllable guide structure configured to guide preparation of at least one bone piece during execution of a surgical plan and a control system configured to define the surgical plan. Defining the surgical plan includes determining a desired relationship between at least a first bone piece and a second bone piece that are separated by the bone fracture and planning preparation of the first bone piece to include a prepared anatomical structure configured to align the first bone piece with the second bone piece such that when aligned, the first bone piece and the second bone piece will achieve the desired relationship. The control system is further configured to control the controllable guide structure according to the surgical plan.

A drug-eluting spacer for temporary implantation in a knee joint includes a femoral component configured to interface with a femur, a tibial tray component having an upper surface, a lower surface, and a shaft extending from the lower surface, the shaft configured to be positioned axially within a tibia, the lower surface configured to interface with the tibia, and a tibial insert component having an upper surface and a lower surface, the lower surface of the tibial insert component configured to engage the upper surface of the tibial tray component, the upper surface of the tibial insert component configured to receive the femoral component in an articulating manner. The femoral component, the tibial tray component, and the tibial insert component carry joint loads when implanted. The drug-eluting spacer is configured to elute a biologically active agent in an amount effective to treat an infection of the knee joint.