JP2013006079A - Pilot femur prosthesis and use of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a component not needing to be removed in a test pretreatment process.SOLUTION: An embodiment of the present invention is related to a test system including temporary orthopedic components, specifically, a test femur component (100) and a cam module (10) used during a joint replacement operation. In a recorded system and a recorded method, a surgeon pretreats a bone of a patient, and provides the system to assist in storage of a permanent implant. The system is used so as to guide a pretreatment-like box-shaped excised part, and is finished together with the cam module (10) without being removed from the bone of the patient, and the same components are used for a test process.

Description

  Embodiments of the present invention generally relate to temporary orthopedic components, and more specifically to test systems used during joint replacement. The described systems and methods provide for a system used for preparative resection to prepare a patient's bone to receive a permanent implant and to accurately align the implant used. Assist in judging.

  Implant temporary components (also referred to as “test components”) are commonly used during joint replacement procedures. They are used to test the fit and alignment of the implant to the bone shaped by the surgeon. However, the actual implant used serves these purposes, and the use of experimental or temporary components eliminates the risk of damaging the actual implant. The test component also saves the surgeon the cost of sterilization, and the surgeon must implant the actual component at the surgical site until the exact size of the component required is determined. Protect, avoid.

  One common type of joint replacement is knee surgery. In knee replacement surgery, the surgeon primarily attaches two prosthetic components to the patient's bone structure, first the patient's femur (femoral component) and secondly the patient's tibia (tibia component). The femoral component is primarily placed at the tip of the patient's femur after appropriate resection, and the tibial component is primarily placed on the patient's tibial plateau after appropriate preparation. Various adjustments form a cut in either the tibia or femoral surface, and the size of the various components is taken into account. During this process, the knee is bent and stretched to determine the proper size, fit and adjustment for the component. The surgeon replaces the various tibial components to determine the proper size and fit for the implant.

  More specifically, the test prosthesis is used to try to fit an actual prosthesis or implant component into each part of the joint. After shaping the femur and tibia, the surgeon temporarily fits the tibial component to the femur and / or tibia instead of the actual prosthetic component. This allows the surgeon to try the fit and performance of the component both fully static and dynamic within the desired range of motion. By using a pilot prosthesis in place of the actual implant, the surgeon can perform this test, providing a more complete fit of the actual component and more without introducing the actual prosthetic component at the surgical site. Accurate performance can be obtained. Surgeons use a variety of imaging techniques and palpation to observe detailed patient tissue before surgery, but they nevertheless fit the prosthetic components after the knee is surgically exposed and surgery begins Get important information needed to match.

  Accurate positioning and fitting of the prosthetic components is important for a number of reasons. First, each patient has a different bone structure and geometry. Also, the movement of the tibia relative to the femur about all axes varies from patient to patient. In addition, some knee replacement patients have functional problems with medial / lateral, anterior / posterior, or varus / valgus ligaments, and implants that regulate knee joint movement are not Is necessary to increase stability. These facts require the surgeon to use a femoral implant with a restriction box geometry to ensure knee stability once the ligament has been removed.

  Various systems for surgery at the expense of these cruciate ligaments are used to prepare bone-removed blocks / guides for the control box to prepare bones and accept permanent implants for fitting. And a separate femoral test component. In this process, the surgeon forms an initial excision using an excision block located in the femur. Such resection blocks are primarily square (ie they are not shaped like a real implant) and are fixed in place on the resected femur. The anterior and posterior chamfer cuts then shape the bone to accommodate the inner portion of the femoral component (ie, the “box portion”). And the excision part which is the box-shaped excision of the femur needs to be formed. Primarily, a separate femoral box-shaped resection guide is fixed to the surface of the femur, and a reciprocating saw and / or box chisel is intermediate the bone in the notch. , Used to remove side and close (and in some cases rear) parts. Then, for test shortening, the resection guide is removed and the femoral test component, which has a box-like geometry incorporated into the component, is secured to the prepared femur. The tibial tray is placed on the prepared tibia and, if necessary, the test knee component is selected as well. Once the component is in place, the surgeon verifies the range of motion and knee stability.

  However, using separate regulatory box resection guides and then separate test components adds surgical time and forces the surgeon to make further assumptions, and the resection and testing process is performed with a single component Generally less efficient than the case. Some implant designers are trying to solve this problem by providing adapters of various sizes that are screwed onto the femoral tibial component, and some adapters allow surgery to hold the cruciate ligament And other adapters allow surgery at the expense of the cruciate ligament. See, for example, Patent Document 1 granted to Johnson & Johnson Professional Co., Ltd. on July 7, 1998. Others provide a span member that locks into place with the slide retaining member. See U.S. Pat. No. 6,053,097 granted to Zimmer Technology on December 7, 2004.

US Pat. No. 5,776,201 US Pat. No. 6,827,739

  However, to use these systems, the femoral test component needs to be removed from the operating envelope to incorporate the adapter and span member into the component. In short, both of these systems cooperate with the inner or proximal portion of the femoral test component.

  The form of the present invention assists in solving these problems by providing a femoral test component, which is used as a guide for the box-shaped resection and is removed from the patient's bone Without completion-completed with the cam module, the same components are used for the test process. One way of accomplishing this is to provide a cam module that cooperates with the outer distal face, portion, and side of the femoral test component, which component in the under-test processing step. There is no need to be removed.

  The described system and method assists a surgeon in receiving a permanent implant by providing a system by preparing the patient's bone and the system guides the prepared box-shaped excision. And completed with a cam module without removing the system from the patient's bone, the same components are used for the testing process.

One aspect of the invention provides a femoral test component, the femoral test component comprising:
(A) a main body portion having an intermediate wall portion and a side wall portion;
(B) one or more shoulders extending from an upper portion of the intermediate wall or side wall, wherein the one or more shoulders are configured to cooperate with the femoral test component; And
(C) a cam member extending between the intermediate wall portion and the rear portion of the side wall portion;
Is provided.

  In one form, the cam module further comprises a front wall, and the one or more shoulders extend from the intermediate wall, the side wall or the front wall.

  In another form, the cam module further comprises a base portion between the intermediate wall portion and the side wall portion.

  In a further form, the one or more shoulders further comprise a pivot pile.

  A further form provides an opening between the intermediate wall and the side wall.

  Another form further comprises a test tibial component having a post configured to be received by the opening of the cam module.

  In a further form, the cam module further comprises a retention system that cooperates with the distal surface of the femoral test component.

  In some forms, the retention system comprises at least one elastic arm and at least one retention member associated with the elastic arm, and in use, the elastic arm is attached to the femoral test component. When the cam module is inserted, it is pressed to allow the retaining member to cooperate with a corresponding structure on the femoral test component.

  In other forms, the retention system comprises a spring loaded system.

  The further form further comprises a rotation stop. In some forms, the rotation stop extends from an upper portion of the intermediate wall portion and the side wall portion and forms a ridge portion that abuts the femoral component in use. In a further form, the rotation stop abuts a pathway in the femoral component.

  Another form provides a femoral component having one or more cutting slots formed therein. The femoral component also includes one or more receiving portions that receive one or more shoulders of the cam module. The femoral component further comprises one or more fixation holes formed therein.

  Another aspect of the invention is as a component of a kit comprising one or more femoral test components, one or more tibial test components, one or more actual femoral implants, one or more actual tibial implants, or a combination thereof. The cam module is provided.

  Another form provides a cam module configured to cooperate with the distal surface of the femoral test component without removing the femoral test component from the patient's bone.

Another aspect of the invention provides a method for preparing a final implant by preparing a final femur, the method comprising:
(A) providing a femoral test component having an outer distal side and an inner proximal side, the femoral test component comprising:
(I) a resection slot formed in the femoral test component;
(Ii) a femoral condylar component separated by an opening;
(Iii) one or more accommodation portions on the outer distal side, one or more accommodation portions for accommodating the shoulders of the cam module;
A process comprising:
(B) placing a femoral test component on the resected femur and preparing a further resection, using the opening to prepare a box-shaped resection;
(C) A step of preparing a cam module, wherein the cam module is
(I) a body portion having an intermediate wall portion and a side wall portion;
(Ii) one or more shoulders extending from an upper portion of the intermediate or side wall portion, wherein the one or more shoulders are configured to cooperate with one or more receiving portions of the femoral test component; One or more shoulders,
(Iii) a cam member extending between the intermediate wall portion and the rear portion of the side wall portion;
A process comprising:
(D) placing one or more shoulders of the cam module in one or more receiving portions of the femoral test component, and fitting the cam module into the opening of the femoral test component;
Is provided.

  Some forms of these methods have a cam module configured to cooperate with the femoral test component without removing the femoral test component from the patient's bone.

Other forms are
(E) providing a tibial component having a column;
(F) placing the tibial component on the prepared tibial plateau;
(G) inserting the column portion of the tibial component between the intermediate wall portion and the side wall portion of the cam module;
(H) testing the femoral and tibial components by stretching and flexing the patient's knee;
Is further provided.

Another aspect of the invention relates to a system for preparing a final implant by preparing a femur, the system comprising:
(A) a femoral test component comprising:
(I) a femoral condylar component separated by an opening;
(Ii) one or more receiving portions on the distal face of the femoral test component, the one or more receiving portions for receiving the shoulder of the cam module;
A femoral test component comprising:
(B) a cam module,
(I) a body portion having an intermediate wall portion and a side wall portion;
(Ii) one or more shoulders extending from an upper portion of the intermediate or side wall, wherein the one or more shoulders are configured to cooperate with the femoral component; ,
(Iii) a cam member extending between the intermediate wall portion and the rear portion of the side wall portion;
A cam module comprising:
Wherein the one or more shoulders of the cam module are secured by one or more receiving portions of the femoral test component and the cam module is configured to fit into the opening of the femoral test component.

  Such a system configuration provides multiple femoral test components of various sizes, multiple cam modules of various sizes, or combinations thereof.

  Another form further comprises a tibial test component having a post, the post being configured to be received by an opening located in front of the cam member in the cam module.

  Other forms of the system provide different sizes of femoral test components, different sizes of multiple cam modules, different sizes of multiple tibial test components, or combinations thereof.

  A further form provides a cam module configured to cooperate with a femoral test component without removing the femoral test component from the patient's bone.

  Another form provides a femoral test component having a resection slot formed therein.

One specific aspect of the present invention provides a cam module for a femoral test component, the cam module comprising:
(A) a body portion having an intermediate wall portion, a side wall portion, a front wall portion and an opening;
(B) one or more shoulders extending from an upper portion of the intermediate wall or side wall, wherein the one or more shoulders are configured to cooperate with the femoral test component and are pivoting piles One or more shoulders having
(C) a cam member extending between the intermediate wall portion and the rear portion of the side wall portion;
(D) a retention system for securing the cam module to the outer distal side of the femoral component;
(E) a rotation stop portion extending from an upper portion of the intermediate wall portion and the side wall portion, wherein the upper portion forms a ridge portion that contacts the path portion of the femoral component;
The cam module is configured to cooperate with the femoral test component without removing the femoral test component from the patient's bone.

  As used herein, “form” means “aspect” or “object of the present invention,” and vice versa.

FIG. 6 is a front perspective view showing a cam module positioned on a femoral test component. FIG. 6 is a top perspective view illustrating one embodiment of a cam module in various forms of the present invention. FIG. 3 is a bottom perspective view showing the cam module of FIG. 2. FIG. 6 is a rear perspective view showing the cam module positioned on the femoral test component. FIG. 6 is a top perspective view showing a cam module secured to a femoral test component. FIG. 6 illustrates another embodiment of a cam module positioned on a femoral test component. FIG. 6 is a front cross-sectional view showing the cam module held in place via a spring loading system with respect to the femoral component. It is an enlarged view which shows the spring load system of FIG. 7, Comprising: It is an enlarged view which shows the spring load system before a cam module is fixed to a predetermined position. FIG. 8 is an enlarged view showing the spring load system of FIG. 7 and showing the spring load system after the cam module is fixed in place. FIG. 3 shows an example of a permanent implant placed on the femur, once the femur has been prepared and the correct component fit has been determined by testing. FIG. 6 shows the interaction between the cam module and the tibial test column during the test. FIG. 3 is a front perspective view showing a femoral test component and a tibial test component in place on a patient's bone.

  Embodiments of the present invention provide systems and methods that allow a surgeon to prepare a patient's femur to more efficiently receive a femoral component. One embodiment provides a femoral test component that is used to form an ablation having a restriction box geometry and that includes a cam module without removing the test component for the testing process. This system first eliminates the need to use the resection guide to prepare the femur and then remove the resection guide to replace the resection guide with a test component for the test process. This shortens the operating room period and reduces the need for multiple intrusions of the surgical envelope (replaces and removes components) and reduces the possibility of infection and other complications.

  As shown in FIG. 1, there are a femoral test component 100 and a component of the cam module 10. These components are made of any material suitable for testing purposes such as rigid plastics or composites such as zirconium, cobalt-chromium, stainless steel, titanium or polyethylene or graphite and polymers. The femoral test component 100 has a J-shaped cross section, with the upper portion of the “J” forming an anterior portion 120 and the hook portion of the “J” forming the condylar portion 108 of the component 100. is doing. This is perhaps more clearly shown in the perspective view of FIG. As shown in FIG. 4, the test component 100 has a stem portion 112 and a stem (shown) that is received in the patient's intramedullary canal to secure the component 100 in place with an opening 116. It becomes the protrusion 114 which receives (abbreviation). This allows the test component 100 to test different types of stems such as offset stems, angular stems and stems of various lengths and diameters.

  Test component 100 is shown with various ablation slots 102. Although multiple slots are shown in a particular direction, it should be understood that the direction of one or more slots is considered within the scope of the present invention. During surgery, the surgeon forms various excisions of the femur as needed. The surgeon uses the slot 102 in the test component 100 to guide resection of these cuts. Further, the opening 106 is formed between the condylar components 108 when the module 10 is not in place. The opening 106 of the test component 100 forms an access region through which the instrument passes to prepare a box-shaped resection in the femur. The path 110 in the test component 100 is used to guide a box-shaped cutting guide, flea and / or reamer. Pretreatment is required to properly fit the bone for the box-like portion 152 of the implant 150. An example of the final implant 150 is shown in FIG. 10 for reference. As shown below and described in more detail, the box-like portion 152 of the implant 150 cooperates with the post 162 of the test component 160 for securing to the knee.

  Referring back to FIG. 1, in addition to the ablation slot 102, the test component 100 has one or more fixation holes 122. The fixation hole 122 is intended to accommodate a fastener or pin that holds the test component 100 in place on the patient's bone during surgery.

  Test components that are shaped like a real implant and through which cuts are made can be used because the test component is anterior / posterior, middle / lateral, and internal Convenient because it provides the surgeon with visual cues for rotation of the outer / outer femoral component. The cam module 10 is then inserted into the opening 106 and the geometry that regulates the cruciate ligament of the test component 100 for test purposes once the cut is prepared without removing the test component 100 from the patient's bone. Achieve the shape. This reduces surgical time and reduces the need for multiple placement and removal steps for different types of resection guides and test components that can cause the above-mentioned complications. .

  As described, the cam module 10 cooperates with and completes the test component 100. An example of one embodiment of the cam module 10 is shown in FIG. The module 10 is shown having a body portion 12 formed by an intermediate and side wall portion 14, a base portion 16, a rear wall portion 18, an opening 20 and a cam member 22. (The module may be provided with fewer walls than those described.) Different spacings and heights between the walls 14 and 18, the base portion 16 and the cam member 22 are accommodated for different sized implants. Various types of modules can be provided. However, it is also possible to provide a different sized femoral test component 100, all of which cooperate with the same sized cam module 10, so that an additional plurality of femoral test components 100 can be provided during surgery. Prevents the need for cam module components. As will be described in more detail below, the body portion 12 of the cam module 10 essentially defines one or more walls to stabilize or regulate knee movement in knee replacements that sacrifice the cruciate ligament. Forming a box portion to be

  The shoulder 24 extends forward from the body portion 12 and in some embodiments from the middle and side wall portions 14. The shoulder 24 has an optional pivot pile 26 that assists in placing and securing to the receiving portion 104 of the test component 100 as shown in FIG. Although the rotating pile 26 is useful, it is possible to provide a cam module without such a pile as shown in FIG. Instead of the pivoting pile, the cam module shoulder 24 shown in FIG. 6 may be shaped like a wing 50 that fits within and cooperates with the receiving portion 104 of the test component 100. Good. Other locking mechanisms such as dovetail slots, J-shaped hook locks, ball and detent mechanisms, magnet locks, snap or push locks or other suitable locks or locking mechanisms may be used to test component 100. It should be understood that cooperation between the cam module 10 and the cam module 10 may be achieved. It should be understood that when other securing mechanisms are used, the shoulder 24 of the cam module 10 and the receiving portion 104 of the test component 100 are properly shaped and fit together. The general purpose is that the cam module 10 is easily and stably held on the test component 100 and is relatively easy to remove if additional bone preparation is required.

  The shoulder 24 and the optional pivot pile 26 are aligned with the receiving portion 104 of the test component 100, and the shoulder and pivot pile are located in front of the module 10 around the pivot pile 26. Limit the movement of the cam module 10 in all directions, except to allow rotation on /. As shown in FIG. 3, the rotation of the cam module 10 is stopped by a rotation stop portion 34 on the bottom surface of the cam module. In use, the rotation stop 34 abuts the path 110 of the test component 100 and stops further rotation of the module 10 as shown in FIG.

  The cam module 10 is then held and fixed in place on the test component 100 by the holding system 28. Both the retention system 28 and the shoulder 24 / accommodating portion 104 interface are opposite the inner proximal surface (eg, the inner portion that is compatible with the bone) and the cam module of the femoral test component 100 (also externally). It is designed to be held on an outer tip surface 118 (referred to as the tip side or tip portion) (eg, the outer surface of the test component at the tip). By securing the cam module at the outer tip surface 118, the cam module 10 allows the test component to be assembled to the test component 100 when it is in place on the patient's bone. (This is in contrast to currently available systems, which include an adapter that cooperates only with the proximal face of the femoral test component, for example by a screw that secures the adapter to the test component as shown in US Pat. One of the problems with this prior art construction is that when the test component is actually at the desired location on the femur, the proximal surface of the test component is hidden by the bone and inserted to use the adapter during surgery. The need to remove the adapter and the test component placed on the bone from the patient's bone causes some of the problems described above.) An example of a retention system at the distal surface 118 of the module 10 and the test component 100 Is shown in FIG. Another example of a retention system 28 is shown in FIGS.

  With reference now to FIG. 2, one embodiment of the retention system 28 features an elastic arm 30 and a retention member 32. In use, the elastic arm portion 30 is pressed inward (towards the intermediate and side wall portions 14). Once the cam module 10 is fully inserted, the arm 30 relaxes and returns to the middle position of the arm and abuts the test component 100 to secure the module 10 in place. The holding member 32 is similarly provided and functions as a tab for further fixing by abutting and pressing against the test component 100 and holding the module 10 in place. An example of this system 28 in use is shown in FIG.

  Another holding system is shown in FIGS. The system features a spring loading system 60 having one or more springs 62 incorporated into the condylar portion 108 of the femoral test component, as shown. The end of the spring is a protrusion 64. As shown in FIG. 8, the cam module 10 includes a receiving portion 66 having a lower ledge portion 68, a recessed portion 70, and an upper ledge portion 72. As the cam module 10 is rotated to a predetermined position, the lower ledge portion 68 presses the spring 62 from the outside, and as the module is pressed to the predetermined position, the protruding portion 64 at the end of the spring 62 is It can be slid on the lower ledge portion 68 and placed in the concave portion 70 in the accommodating portion of the cam module. Because the spring 62 is elastic, the module 10 can be easily removed and replaced as needed. An example of this system in use is shown in FIG.

  Although two exemplary connection mechanisms have been described, the femoral test component 100 allows the cam module 10 to be removably locked and secured or housed so that it can no longer rotate about its shoulder 24. Any connection system should be considered within the scope of the present invention. For example, the components can be snapped together and magnetized to secure each other, secured by a ball and detent mechanism, have a J-shaped hook lock, have a dovetail-shaped slot and channel, or It may be connected in this retracted position by any other suitable method.

  Referring again to FIG. 2, the cam module 10 similarly has a cam member 22 at its rear end. The cam member 22 is essentially a thin bar portion 40 extending between the middle and the rear end of the side wall portion 14. As shown, the cam member 22 has a smaller circumference (or more eccentric) at its intermediate portion 42 than its outer end 44. This assists in making the knee motion similar to that achieved with an actual implant. The thin portion at the end also assists in securing the outer end 44 to the wall 14. The cam member 22 is provided so as to replicate the cam of the actual implant, as shown in FIG.

  FIG. 10 shows the implant 150 and shows how the implant 150 cooperates with the tibial component (or support insert) 160 once the actual component is in place. By perspective view, FIG. 11 shows the interaction between the cam module and the tibial test column during the test. As shown, the condyle 108 of the femoral test component 100 rests against the support surface 172 of the test tibial component or support insert 170 (both referred to as component 170 for convenience). Component 170 extends upward from its upper surface 176, ie, the surface that does not face the patient's bone in use. The cam member 22 of the femoral test component 100 is placed in contact with the rear portion 178 of the column portion 174. During the test, the femoral test component 100 is rotated back (with the cam member 22 cooperating with the post 174) to determine the optimal fit. The middle, side and front wall portions 14, 18 all assist in constraining the column portion 174 in place.

  Specifically, during testing, a femoral test component having an outer distal side and an inner proximal side is provided, the femoral test component comprising: (i) a resection slot formed in the test component; (Ii) a femoral condylar component separated by an opening; and (iii) one or more receiving portions on the outer distal side for receiving a shoulder of the cam module. Have. The surgeon places the femoral test component on the resected femur and prepares an additional resection while using an opening to prepare the box-shaped resection. The surgeon may: (i) a body portion having an intermediate wall portion and a sidewall portion; and (ii) one or more shoulder portions extending from the intermediate wall portion or an upper portion of the sidewall portion, wherein the one or more shoulder portions are thighs. One or more shoulders configured to cooperate with one or more receiving portions of the bone testing component; and (iii) a cam member extending between the intermediate wall portion and the rear portion of the side wall portion. Select the cam module. The surgeon places one or more shoulders of the cam module within one or more receiving portions of the femoral test component, and the cam module fits into the opening of the femoral test component at the outer distal side.

  Some embodiments of these methods have a cam module configured to cooperate with the femoral test component without removing the femoral test component from the patient's bone.

  Other embodiments include (e) providing a tibial component having a post, (f) placing the tibial component on a prepared tibial plateau, and (g) the tibial component post being a cam module. And (h) testing the femoral and tibial components by stretching and flexing the patient's knee.

  FIG. 12 is a front view of the completed test system in place on the patient's knee and in use.

  Once the test process is performed, the surgeon determines the exact size of the implant to be used. The femoral component is usually made of metal and has a highly polished outer condylar joint surface. For example, these are zirconium, titanium, stainless steel, cobalt-chromium or any other suitable metal that provides sufficient stability and biocompatibility. It should be noted that although rare, ceramics are used as well. Also, the tibial component may be formed of any of the above materials, and the support insert is often in the form of polyethylene (eg, ultra-high molecular weight polyethylene that reduces wear particles) or some other high density plastic form.

  Because the femoral component cooperates with either of the movable support tibial components, both components are referred to in this description and in FIG. 10 as component 160, either used in various embodiments and the present invention. It is clear that it is considered to be within the scope of. The component 160 has an upwardly directed column portion 162 that extends in use through the opening 156 of the box-shaped portion 152 and cooperates with the cam 154 of the implant 150 in use. It is shown as The front portion of the post 162 abuts the middle and sidewall portions of the implant 150 (which essentially corresponds to the middle and sidewall portions 14 of the module 10). This system assists in maintaining the stability of the implant by replacing the posterior cruciate ligament when the patient's original posterior cruciate ligament is removed during surgery. The purpose of providing the cam member 22 and the opening 106 in the test component 100 is that the knee that occurs between the cooperation of the cam 154 and the column 162 of the support 160 and the column 162 of the opening 156. It is to replicate the movement. During the test, the cam member 22 is engaged with the tibial column when the knee is bent and the tibia is forwardly dislocated (extruded), and the intermediate and side wall portions 14 are engaged with the tibial column and the tibia. And preventing excessive lateral movement of the femoral component. For example, based on structural restrictions, the front wall portion 18 engages the test column to prevent excessive overextension.

  Test component 100 (with cam module 10 in place) is tested using a test support component or a tibial test component. (Although not shown, various test supports and / or tibial test components are used with the test component 100 to determine the exact size of the final component used.) The system is predetermined. This range of motion estimates the difference in stability. The middle and side wall portions 14 regulate varus / valgus stability and partially rotational stability between the test component 100 and the tibial test component or support. The cam member 22 is originally provided so as to replicate the regulation such as the posterior cruciate ligament. The front wall 18 provides overextension stability.

  The variety of knee structure, geometry, and power forces most suppliers of prosthetic components to provide a wide selection of prostheses for knee replacement. These include, for example, femoral and tibial components for primary and revision surgery, porous and non-porous coating components, plates for various tibial components, and interfaces for various femoral components for primary and revision surgery And a prosthesis that features and does not feature a movable support. The present invention is intended for use with any of these options.

  Changes and modifications, additions and deletions may be made to the structures and methods described above and illustrated in the drawings without departing from the scope and spirit of the present invention and the following claims.

10 cam module, module, 12 body part, 14 side wall part, wall part, 16 base part, 18 front wall part, front wall part, 20 opening part, 22 cam member, 24 shoulder part, 26 rotating pile part, 28 holding System, System, 30 Elastic arm, Arm, 32 Holding member, 34 Rotation stop, 60 Spring load system, 66, 104 Housing part, 68 Lower ledge part, 72 Upper ledge part, 100 Femoral test component, Test component , Component, 102 resection slot, slot, 106, 116, 156 opening, 108 condylar portion, condylar portion, condylar component, 110 path portion, 118 outer tip surface, tip surface, 122 fixation hole, 150 implant , 152 Box-shaped part, 160 Support part, Test component, Component, 162,1 4 column portion, the pillar portion, 170 bearing insert component, 176 top 178 after partial

Claims (30)

A femoral test component module,
(A) a main body portion having an intermediate wall portion and a side wall portion;
(B) one or more shoulders extending forward from an upper portion of the intermediate wall or the side wall, wherein the one or more shoulders are configured to cooperate with the femoral test component. Thus, the shoulder is one or more shoulders that rotate the module into position relative to the femoral test component;
A module comprising: Further comprising a front wall,
The module according to claim 1, wherein one or more of the shoulder portions extend from the intermediate wall portion, the side wall portion, or the front wall portion.   The module according to claim 1, further comprising a base portion between the intermediate wall portion and the side wall portion.   The module according to claim 1, wherein the one or more shoulder portions further include a rotating pile portion.   The module according to claim 1, further comprising an opening between the intermediate wall portion and the side wall portion.   6. The module of claim 5, further comprising a test tibial component having a post configured to be received by the opening.   The module of claim 1, further comprising a retention system that cooperates with a distal surface of the femoral test component. The holding system comprises at least one elastic arm and at least one holding member associated with the elastic arm;
In use, the resilient arm is pressed upon insertion of the module into the femoral test component, allowing the retaining member to cooperate with a corresponding structure in the femoral test component. The module according to claim 7.   The module of claim 7, wherein the retention system comprises a spring load system.   The module according to claim 1, further comprising a rotation stop unit.   The module according to claim 10, wherein the rotation stop portion extends from an upper portion of the intermediate wall portion and the side wall portion, and forms a ridge portion that contacts a femoral component in use.   The module according to claim 10, wherein the rotation stop part contacts a path part in the femoral component.   The module of claim 1, wherein the femoral component has one or more cutting slots formed therein.   The module of claim 13, wherein the femoral component comprises one or more receiving portions that receive one or more shoulders of the module.   The module of claim 13, wherein the femoral component further comprises one or more fixation holes formed therein.   The module is provided as a component of a kit comprising one or more femoral test components, one or more tibial test components, one or more actual femoral implants, one or more actual tibial implants, or a combination thereof. The module according to claim 1.   The module of claim 1, wherein the module is configured to cooperate with a distal surface of the femoral test component without removing the femoral test component from a patient's bone. A method of preparing a final implant by preparing a final femur,
(A) providing a femoral test component having an outer distal side and an inner proximal side, the femoral test component comprising:
(I) a resection slot formed in the femoral test component;
(Ii) a femoral condylar component separated by an opening;
(Iii) one or more accommodation portions for accommodating the shoulders of the module at the outer tip side;
A process comprising:
(B) placing the femoral test component on the resected femur and preparing a further resection to use the opening to prepare a box-shaped resection Process,
(C) a step of preparing a module, the module comprising:
(I) a body portion having an intermediate wall portion and a side wall portion;
(Ii) one or more shoulders extending forward from an upper portion of the intermediate wall or side wall, wherein the one or more shoulders cooperate with the one or more receiving portions of the femoral test component. One or more shoulders that are configured to act so that the shoulders rotate the module into position relative to the femoral test component;
(D) rotating one or more of the shoulders of the module into one or more of the receiving portions of the femoral test component and fitting the module into the opening of the femoral test component;
A method comprising the steps of:   The method of claim 18, wherein the module is configured to cooperate with the femoral test component without removing the femoral test component from a patient's bone. (E) providing a tibial component having a column;
(F) placing the tibial component on a prepared tibial plateau;
(G) preparing a module having a cam member extending between the intermediate wall portion and a rear portion of the side wall portion;
(H) inserting the column portion of the tibial component between the intermediate wall portion and the side wall portion of the cam member;
(I) testing the femoral component and the tibial component by stretching and flexing a patient's knee;
The method of claim 18, further comprising: A system for preparing the final implant by preparing the femur;
(A) a femoral test component comprising:
(I) a femoral condylar component separated by an opening;
(Ii) one or more receiving portions on the distal face of the femoral test component, the one or more receiving portions for receiving a shoulder portion of the module;
A femoral test component comprising:
(B) a module,
(I) a body portion having an intermediate wall portion and a side wall portion;
(Ii) one or more shoulders extending forward from an upper portion of the intermediate wall or the side wall, wherein the one or more shoulders are configured to cooperate with the femoral component, One or more shoulders for rotating the module into position with respect to the femoral test component;
A module comprising:
With
One or more of the shoulders of the module are secured by one or more of the receiving portions of the femoral test component, and the module is configured to fit into the opening of the femoral test component. A system characterized by   23. The system of claim 21, wherein a plurality of different sized femoral test components, a plurality of different sized modules, or a combination thereof are provided. A tibial test component having a column; and
A module having a cam member extending between the intermediate wall portion and a rear portion of the side wall portion;
Further comprising
The system according to claim 21, wherein the column part is configured to be received by an opening part located in front of the cam member in the module.   24. The system of claim 23, wherein a plurality of femoral test components of various sizes, a plurality of modules of various sizes, a plurality of tibial test components of various sizes, or a combination thereof are provided. .   The system of claim 21, wherein the module is configured to cooperate with the femoral test component without removing the femoral test component from a patient's bone.   The system of claim 21, wherein the femoral test component has a resection slot formed therein. A cam module of a femoral test component,
(A) a body portion having an intermediate wall portion, a side wall portion, a front wall portion and an opening;
(B) one or more shoulders extending forward from an upper portion of the intermediate wall or the side wall, wherein the one or more shoulders are configured to cooperate with a femoral test component; One or more shoulders that have a pivoting pile, so that the cam module pivots to a predetermined position of the femoral test component;
(C) a cam member extending between the rear portion of the intermediate wall portion and the side wall portion;
(D) a retention system for securing the cam module to the outer distal side of the femoral component;
(E) a rotation stop portion extending from an upper portion of the intermediate wall portion and the side wall portion, wherein the upper portion forms a ridge portion that contacts the path portion of the femoral component;
With
The cam module is configured to cooperate with the femoral test component without removing the femoral test component from a patient's bone.   The module according to claim 1, further comprising a cam member extending between the intermediate wall portion and a rear portion of the side wall portion. The module is
(iii) a cam member extending between the intermediate wall portion and a rear portion of the side wall portion,
The method of claim 18, further comprising: The module is
(iii) a cam member extending between the intermediate wall portion and a rear portion of the side wall portion,
The system of claim 21, further comprising: