Zimmer Inc. | Date: 2015-08-07
A kit of patient-specific guides for use in preparing a proximal femur to receive a prosthesis is described, and includes patient-specific preparation guides. The femoral resection guide has a body including a proximal cut guide surface and a distal conforming surface contoured to rest against and substantially conform to a femoral neck and/or a metaphysis of the proximal femur. The proximal cut guide surface is configured to guide a cutting instrument for resecting the head of the proximal femur. The femoral canal preparation guide has a body including a proximal surface and a distal surface having a first confirming portion contoured to rest against and substantially conform to an unresected portion of a femoral neck and/or a metaphysis of the proximal femur. The body includes a guide aperture extending therethrough that is dimensioned to guide an instrument for preparing a canal of the proximal femur.
Zimmer Inc. | Date: 2015-02-25
Embodiments provide methods, apparatuses, and systems for fixation of a fractured bone. In various embodiments, the systems and plates may provide elastic suspension of the receiving holes relative to the osteosynthesis plate. This elastic suspension may promote load distribution between the screws that connect a bone segment to the plate, thereby reducing stress risers and load shielding effect. In addition, stress at the screw holes, and within the construct as a whole, is reduced by incorporation of these elastic elements in the plate. Additionally, in some embodiments, for instance if fracture healing by callus formation is desired, elastic suspension of the receiving holes relative to the osteosynthesis plate may enable small, controlled amounts of relative motion between bone fragments connected by the plate, which may promote fracture healing by callus formation.
Zimmer Inc. | Date: 2015-01-30
One aspect of the present disclosure provides an insert press that has a threaded shaft with a distal end. An insert driver is disposed at the distal end of the threaded shaft. The insert press also includes a press housing that provides a bore through which the threaded shaft extends. The bore is transformable from a first condition in which the threaded shaft is threadably translatable in the bore to a second condition in which the threaded shaft is non-threadably translatable in the bore.
Zimmer Inc. | Date: 2015-05-05
An orthopedic tool for loosening the connection between orthopedic components. In one embodiment, the orthopedic tool includes a housing and a wedge. The housing has a head, an upper portion, a lower portion, and an opening between the upper and lower portions. The wedge is positioned at least partially between the upper portion and the lower portion of the housing and is actuatable to move toward the head of the housing. When at least a portion of the head of the housing is placed in mating engagement with the junction between two assembled orthopedic components, advancement of the wedge towards the head results in separation of the upper portion and lower portion of the housing. Thus, as the wedge is advanced toward the head, the upper and lower portions of the housing are separated, which results in corresponding separation of the assembled orthopedic components.
Zimmer Inc. | Date: 2015-07-07
The present disclosure provides knee prostheses that replicate at least a portion of the function of an individual patients anterior cruciate ligament (ACL). An exemplary knee prosthesis includes a femoral component configured to be implanted on the distal end of the patients femur and a tibial component configured to be implanted on the proximal end of the patients tibia. In extension, the femoral component and the tibial component may cooperate to limit anterior movement of the tibial component relative to the femoral component. In flexion, the femoral component may be free to rotate relative to the tibial component.