Abstract: The invention relates to a surgical navigation device, for the purpose of adjusting a cutting plane to a desired position with respect to a bone of a patient, the device comprising: a fixed part (7) rigidly attached to the bone (18, 19), the fixed part comprising fixation means to rigidly attach a tracker thereto; a mobile part (5) adjustable with respect to the fixed part (7), including fixation means to rigidly attach a tracker thereto, and including a cutting slot (6) in which a saw blade can be inserted to perform cut; a fixed tracker (9) rigidly attached to the fixed part (7); a mobile tracker (1) attached to the mobile part (5). The invention also concerns a method for adjusting a cutting plane of a surgical device to a desired position with respect to a bone of a patient.

Abstract: The present invention relates to a surgical navigation device, for the purpose of adjusting cutting planes to a desired position with respect to a bone of a patient, the device comprising: an adjustable guide (15) that contains several adjustable screws (1) that create contact points with the surface of the bone or cartilage such that the guide fits to the bone in a unique position calculated such that the holes and cutting blocks of the adjustable guide fit with the position planned on preoperative CT or MR images of the patient, a dedicated screwdriver (7) to adjust automatically the screws (1) to their target length, a navigation system used to check the correct position of the adjustable guide with respect to essential anatomical points and if necessary means to correct the positions of the adjustable screws.

Abstract: The present invention relates to a device for adjusting the position of a surgical instrument (1) with respect to a solid (3) tracked by a navigation system (2), wherein the instrument (1) comprises a fixed part (11) that is rigidly fixed to the solid (3) and a mobile part (12) that is attached to the fixed part by screws (13), the device (4) comprising: a stem (41) comprising a tip (42) suited to the head (130) of the screws (13), a motorized system (45) for driving the stem (41) in rotation, a communication device with the navigation system (2), such that the navigation systems (2) transmits to the motorized system (45) the number of turns to apply to the stem (41) to reach the target position of each screw (13).

Abstract: A computer assisted surgical navigation system and method is disclosed for registering the position of prosthetic hip joint components. Elements are applied to the pelvis and femur, generating a three-dimensional array. These two arrays combine to derive a reference point representing the native joint. A tracking device with a pre-determined shape and dimensions that precisely articulate with an acetabular cup component generates a third three-dimensional array. The device has a further shape and dimensions that independently articulate precisely with a neck portion of a femoral component, which represents a prosthetic joint center that is independently registered in the system. The tracking device concurrently registers the three dimensional positions of the femoral and acetabular prosthetic components, along with the prosthetic joint center and the native joint center, respectively enabling alterations in three dimensional location of the leg length and offset prior to reduction of the prosthetic joint.

Abstract: The invention concerns a device for adjusting the position of a screw (13) that is able to move a part of a surgical instrument, said device (4) comprising: —a stem (41) comprising a tip (42) suited to the head (130) of the screw (13), —an actuated system (45) for driving said stem (41) in rotation, —communication means to communicate with a control unit (21), such that the control unit (21) transmits to the actuated system (45) the number of turns to apply to the stem (41) to reach the target position of the screw (13).

Abstract: In an embodiment, the methodology of the present invention is based on the use of an intraoperative navigation system and of a compact alignment guide for alignment of implant components. In an embodiment, an alignment guide of the present invention includes a first component fixable to a bone element; a second mobile component, and a third mobile component, wherein the second mobile component and two control mechanisms form a first link, wherein the two control mechanisms are working in parallel to perform adjustments in two degrees of freedom, wherein the third mobile component and three control mechanisms form a second link, wherein the three control mechanisms are working in parallel to perform adjustments in three additional degrees of freedom, and wherein the first link adjustments and the second link adjustments are performed in series to provide a total adjustment of five degrees of freedom relative to the first component.

Abstract: The present invention relates to a computer assisted surgical navigation method for determining the patient-specific pressure that must be applied on one or both sides of a joint during the ligament balancing steps of an arthroplasty procedure, said method comprising: inserting a tensor (22) inside the joint between a first bone (8) and a second bone (2) when the joint is in a given angular orientation; controlling the pressure applied by the tensor (22) to the joint so as to make it increase from a minimum value to a maximum value; measuring the evolution of the distance between the first and the second bones during said pressure increase; determining the relationship between said distance and said pressure; processing said relationship to determine said patient-specific pressure to apply to the joint.

Abstract: The present invention relates to a surgical navigation device, for the purpose of adjusting cutting planes to a desired position with respect to a bone of a patient, the device comprising: an adjustable guide (15) that contains several adjustable screws (1) that create contact points with the surface of the bone or cartilage such that the guide fits to the bone in a unique position calculated such that the holes and cutting blocks of the adjustable guide fit with the position planned on preoperative CT or MR images of the patient, a dedicated screwdriver (7) to adjust automatically the screws (1) to their target length, a navigation system used to check the correct position of the adjustable guide with respect to essential anatomical points and if necessary means to correct the positions of the adjustable screws.

Abstract: The invention relates to a surgical navigation device, for the purpose of adjusting a cutting plane to a desired position with respect to a bone of a patient, the device comprising: a fixed part (7) rigidly attached to the bone (18, 19), the fixed part comprising fixation means to rigidly attach a tracker thereto; a mobile part (5) adjustable with respect to the fixed part (7), including fixation means to rigidly attach a tracker thereto, and including a cutting slot (6) in which a saw blade can be inserted to perform cut; a fixed tracker (9) rigidly attached to the fixed part (7); a mobile tracker (1) attached to the mobile part (5). The invention also concerns a method for adjusting a cutting plane of a surgical device to a desired position with respect to a bone of a patient.

Abstract: The invention concerns a device for adjusting the position of a screw (13) that is able to move a part of a surgical instrument, said device (4) comprising: —a stem (41) comprising a tip (42) suited to the head (130) of the screw (13), —an actuated system (45) for driving said stem (41) in rotation, —communication means to communicate with a control unit (21), such that the control unit (21) transmits to the actuated system (45) the number of turns to apply to the stem (41) to reach the target position of the screw (13).

Abstract: The present invention relates to a device for adjusting the position of a surgical instrument (1) with respect to a solid (3) tracked by a navigation system (2), wherein the instrument (1) comprises a fixed part (11) that is rigidly fixed to the solid (3) and a mobile part (12) that is attached to the fixed part by screws (13), said device (4) comprising: a stem (41) comprising a tip (42) suited to the head (130) of the screws (13), a motorized system (45) for driving said stem (41) in rotation, communication means with the navigation system (2), such that the navigation systems (2) transmits to the motorized system (45) the number of turns to apply to the stem (41) to reach the target position of each screw (13).