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  Modular orthopaedic component caseUSPTO Application #: 20080021567Title: Modular orthopaedic component case Abstract: A case for modular neck components for hip implants. The case may include indicators based on independent variables associated with physical characteristics of the implant, including leg length, offset, and anteversion. During surgery, the surgeon may be confronted with a need to change a preoperatively-chosen modular neck. For example, the surgeon may desire a change in at least one of the variables, e.g., leg length, offset, and/or anteversion. The case allows the surgeon to quickly and easily select a different modular neck based on an evaluation of one of the variables without requiring reevaluation of the other variables. A method described herein may include preoperative planning in which a template including a grid coordinate system is used, which advantageously provides an intuitive system for the surgeon both preoperatively and during surgery. (end of abstract) Agent: Zimmer Technology - Baker & Daniels - Fort Wayne, IN, US Inventors: Steven L. Meulink, Ryan D. Schlotterback, Barish Banerjee, Stephen J. Vankoski USPTO Applicaton #: 20080021567 - Class: 623 2212 (USPTO) The Patent Description & Claims data below is from USPTO Patent Application 20080021567. Brief Patent Description - Full Patent Description - Patent Application Claims
CROSS REFERENCE TO RELATED APPLICATIONS [0001]This application is a continuation-in-part of co-pending U.S. patent application Ser. No. 11/458,257, filed Jul. 18, 2006, entitled METHOD FOR SELECTING MODULAR IMPLANT COMPONENTS, assigned to the assignee of the present application, the disclosure of which is hereby expressly incorporated herein by reference. BACKGROUND [0002]1. Field of the Invention [0003]The present invention relates to modular components for prosthetic joints. More particularly, the present invention relates to a case for modular neck components for prosthetic hip joints. [0004]2. Description of the Related Art [0005]Orthopaedic prosthetic implants are commonly used to replace some or all of a patient's hip joint in order to restore the use of the hip joint, or to increase the use of the hip joint, following deterioration due to aging or illness, or injury due to trauma. In a hip replacement, or hip arthroplasty procedure, a femoral component is used to replace a portion of the patient's femur, including the femoral neck and head. The femoral component is typically a hip stem, which includes a stem portion positioned within the prepared femoral canal of the patient's femur and secured via bone cement, or by a press-fit followed by bony ingrowth of the surrounding tissue into a porous coating of the stem portion. The hip stem also includes a neck portion adapted to receive a prosthetic femoral head. The femoral head may be received within a prosthetic acetabular component, such as an acetabular cup received within the prepared recess of the patient's acetabulum. [0006]Orthopaedic implants for hip replacement may include modular hip joint components. For example, the hip stem and the neck portion with femoral head are formed as separate components. Prior to an operation, a surgeon chooses a hip stem and a neck portion based on patient anatomy, body image scans, and/or other patient-specific data. However, during surgery, the surgeon may discover that a different hip stem or a different neck portion is desired to provide more optimum results. Modular hip joint components allow the surgeon to choose a different hip stem or neck portion depending on the specific application and needs of the patient and surgeon. Typically, the surgeon will only change the neck portion because the hip stem is usually implanted first, and removal of the hip stem from the femoral intramedullary canal is generally undesirable. Thus, the neck portion is usually the component that is most often changed intraoperatively. The surgeon may be provided with a number of different neck portions to accommodate various patient anatomies. [0007]In one known system, for example, the surgeon chooses from a plurality of options to replace an existing neck portion with an alternative neck portion to provide the best outcome for the patient. The surgeon's choices rely on the location of the center of rotation of the femoral head component of the implant. Referring to FIG. 1, an image of a proximal femur 20 is shown and includes femoral head 22, greater trochanter 24, lesser trochanter 26, femoral neck 28, and a portion of femoral shaft 27. FIG. 1 illustrates a portion 30 of a template used in the known system. The template may also include images of the femur, similar to those described below with reference to FIGS. 3 and 4. Portion 30 of the template may be placed over the image of proximal femur 20 acquired preoperatively to plan the optimum location of the center of the femoral head of the implant. Portion 30 of the template may include a plurality of reference points 32, 34 arranged in a generally fan-shaped arrangement. Each reference point represents the center of rotation for the femoral head component of the implant. Typically, reference points 32, 34 may be based on a spherical or cylindrical coordinate system. If the surgeon desires an intra-operative change which differs from the preoperatively chosen modular neck portion, the surgeon must simultaneously evaluate at least three variables based on the center of rotation of the femoral head of the implant, and may need to consult various tables to evaluate these variables based on physical characteristics of the patient in order to choose an optimal implant. SUMMARY [0008]The present disclosure provides a case for modular neck components for hip implants. The case may include indicators based on independent variables associated with physical characteristics of the implant, including leg length, offset, and anteversion. During surgery, the surgeon may be confronted with a need to change a preoperatively-chosen modular neck. For example, the surgeon may desire a change in at least one of the variables, e.g., leg length, offset, and/or anteversion. The case allows the surgeon to quickly and easily select a different modular neck based on an evaluation of one of the variables without requiring reevaluation of the other variables. A method described herein may include preoperative planning in which a template including a grid coordinate system is used, which advantageously provides an intuitive system for the surgeon both preoperatively and during surgery. [0009]In one form thereof, the present disclosure provides a system for facilitating implant selection, the system including a plurality of implants including at least one subset in which at least one of a first, second, and third variable associated with a respective different physical characteristic of the implants is constant and the others of the first, second, and third variables vary within each subset; and at least one case including a plurality of receptacles, each receptacle configured to receive a corresponding one of the plurality of implants, the plurality of receptacles configured to facilitate selection of one of the plurality of implants based on a change in the at least one variable. [0010]In another form thereof, the present disclosure provides a system for facilitating implant selection, the system including a plurality of implants including at least one subset in which at least one of a first, second, and third variable associated with a respective different physical characteristic of the implants is constant and the others of the first, second, and third variables vary within each subset; and receptacle means for receiving each of the plurality of implants and for facilitating selection of one of the plurality of implants based on a change in the at least one variable. BRIEF DESCRIPTION OF THE DRAWINGS [0011]The above-mentioned and other features of the disclosure, and the manner of attaining them, will become more apparent and will be better understood by reference to the following description of embodiments of the disclosure taken in conjunction with the accompanying drawings, wherein: [0012]FIG. 1 is an image of a proximal femur, further showing a portion of a template of a known system overlaid on the image; [0013]FIG. 2 is a flow chart illustrating steps of a method according to one embodiment of the present invention; [0014]FIG. 3 is an image of a template according to one embodiment of the present invention; [0015]FIG. 4 is a perspective view of the template of FIG. 3 overlaid over the image of a proximal femur; [0016]FIG. 5A is a plan view of an exemplary case of modular neck components used in the method illustrated in FIG. 2; [0017]FIG. 5B is a plan view of another exemplary case of modular neck components used in the method illustrated in FIG. 2; [0018]FIG. 5C is a plan view of yet another exemplary case of modular neck components used in the method illustrated in FIG. 2; [0019]FIG. 6 is an exploded view of a modular implant; and [0020]FIG. 7 is a plan view of an exemplary embodiment case for modular neck components. Continue reading... Full patent description for Modular orthopaedic component case Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Modular orthopaedic component case patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. Start now! - Receive info on patent apps like Modular orthopaedic component case or other areas of interest. ### Previous Patent Application: Method and apparatus for a knee implant Next Patent Application: Acetabular cup augment system Industry Class: Prosthesis (i.e., artificial body members), parts thereof, or aids and accessories therefor ### FreshPatents.com Support Thank you for viewing the Modular orthopaedic component case patent info. 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