Zimmer Inc.

Warsaw, IN, United States

Zimmer Inc.

Warsaw, IN, United States
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Patent
Zimmer Inc. | Date: 2016-11-02

Systems and apparatuses including apparatuses that can be used in a knee replacement procedure are disclosed. According to one example, an assembly for a knee replacement surgery is disclosed. The assembly can comprise an adjustment member, a carrier assembly, a posterior slope housing assembly, and a boom. The carrier assembly can be configured to selectively couple with the adjustment member such that the carrier assembly is moveable relative to the adjustment member to a desired position. The posterior slope housing assembly can be connected to the adjustment member and can be configured to pivot the adjustment member relative to a portion of the posterior slope housing and a tibia. The boom can be coupled to the posterior slope housing assembly and can be configured to couple with a mounting component to mount the posterior slope housing assembly, the carrier assembly and the adjustment member relative to the tibia.


Tibial prosthesis having one or more fins (520, 521) for use in a total or unicompartmental knee athroplasty procedure are disclosed. The one or more fins can be adapted to fix a tibial prosthesis to the tibia and can engage with corresponding channels formed in the resected tibia. Additionally, intercondylar components (102) and methods for use in a total or unicompartmental knee athroplasty procedure are disclosed. The intercondylar component can be integral with or attached to a baseplate (100) configured for attachment to a partially resected proximal surface of the tibia that retains at least a portion of the intercondylar eminence and the anterior cruciate ligament (ACL) and/or the posterior cruciate ligament (PCL). Inner surfaces (127, 129) of the intercondylar component can be configured to engage with at least a portion of the intercondylar eminence remaining with the partially resected tibia. In an example, the intercondylar component or the one or more fins can be formed of a porous material, such as to facilitate bone growth.


Patent
Zimmer Inc. | Date: 2017-01-04

A tibial prosthesis, and, particularly, a fixed bearing tibial prosthesis has a two-pronged securement mechanism. The securement mechanism may or may not be angled. Advantageously, the securement mechanism, working alone or in cooperation with other securement features, minimizes micromotion between the tibial tray and tibial bearing component.


An orthopaedic knee prosthesis includes a femoral component (20, 120, 220) which exhibits enhanced articular features, minimizes removal of healthy bone stock from the distal femur, and minimizes the impact of the prosthesis on adjacent soft tissues of the knee.


Patent
Zimmer Inc. | Date: 2017-01-23

An assembly of a patient specific instrument and tracking system comprises a patient specific instrument having a body with a patient specific contact surface negatively shaped relative to a corresponding surface of a bone for complementary contact therewith. An inertial sensor unit with a preset orientation is connected to the body in a planned connection configuration, such that a geometrical relation between the contact surface and the inertial sensor unit is known. A tracking system has a tracking processor connected to the inertial sensor unit, a user interface, and bone orientation data related to the patient specific contact surface, the tracking processor producing orientation tracking data for the bone using the geometrical relation and the bone orientation data when the preset orientation of the inertial sensor unit is initialized, to output the orientation tracking data on the user interface.


A patient-specific cutting assembly comprises a model file including geometrical data of a bone of the patient, of an intramedullary canal of the bone, and a planned orientation of a cutting block. A fixing rod is adapted to be longitudinally inserted in and extending partially from the intramedullary canal. A patient-specific cutting block is connectable to the fixing rod. The patient-specific cutting block includes a structure having a patient specific geometry corresponding to the model file of the patient, the structure configured to be connected to a portion of the fixing rod projecting from the bone in a unique coupling orientation. A cutting guide is connected to the structure, the cutting guide being in the planned orientation when the structure is connected to the portion of the fixing rod projecting from the bone.


Osteosynthesis constructs for treating bone fractures and bone screws for use in such systems are disclosed. The bone screws include a threaded front section configured for engagement with cortical bone, a threaded mid-section and an un-threaded neck section configured for limited movement within the near cortex of the bone. Osteosynthesis constructs of the type disclosed promote secondary healing by allowing for substantially parallel motion at the near and far cortex within the effective motion range for callus formation.


A cup impactor assembly comprises a shaft. A cup coupler is at a cup end of the shaft and is releasably connecting a cup in fixed relation. A handle is at an impacting end of the shaft. A visual guide is mounted to at least one of the shaft and the handle, the visual guide producing visual guidance for pointing at at least two landmarks of the pelvis or fixed relative to the pelvis, based on a pre-planned patient-specific relation between the at least two landmarks and a desired acetabular cup orientation relative to the landmarks. A method for orienting an acetabular cup prior to impacting in an acetabulum of a pelvis is also provided.


Patent
Zimmer Inc. | Date: 2017-09-27

Systems for determining force balance on a knee joint during a surgical procedure are disclosed. A system can include a tibial prosthesis (340). The tibial prosthesis can include a bearing component (342), a base component (344), and a shim component (346). The bearing component can have a superior articulating surface (460) and an inferior surface (348). The bearing component can include a top portion (816), a bottom portion (823), a frame (818) disposed between the top portion and the bottom portion, and a plurality of sensors (822) disposed between the frame and the bottom portion. The frame can have a plurality of apertures (828) corresponding in size or shape to the plurality of sensors. The base component can have a superior surface (352) and an inferior surface (476). The shim component can be configured to be slidable between the inferior surface of the bearing component and the superior surface of the base component in an anterior to posterior direction.


Patent
Zimmer Inc. | Date: 2017-09-27

A knee arthroplasty assembly for use in a patients knee joint including a tibia and a femur is disclosed. The assembly can include a tool (10), a first accessory (90), and a second accessory (100). The tool can include a tibial component (14) configured for placement against the tibia and a femoral component (16) configured for placement against the femur. The femoral component can be moveably coupled to the tibial component to place the patients knee joint in tension by separating the tibia and the femur. The first accessory can be removeably coupled to the tibial component of the tool. The second accessory can be referenced to the first accessory and can have a reference indicator (114A, 114B) that references the femur for determining a size of the femur.

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