Congruent in the coronal plane and provides low contact stresses. The Condylar Radius Design provides interchangeability between all primary femoral and primary tibial components while maintaining line-to-line contact, even with joint distraction. The posterior-referencing instrumentation creates balanced soft tissue by resecting the amount of bone replaced by the implant. Provides for a consistent flexion-extension gap, and reduces the need for ligament adjustment. The potential for anterior notching is virtually eliminated through the design of a 3 anterior flange and precise instrument design. The Condylar Radius Design allows for a total of 30 of rotation, as well as rollback of the primary femoral component.
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Congruent in the coronal plane and provides low contact stresses. The Condylar Radius Design provides interchangeability between all primary femoral and primary tibial components while maintaining line-to-line contact, even with joint distraction. The posterior-referencing instrumentation creates balanced soft tissue by resecting the amount of bone replaced by the implant.
Provides for a consistent flexion-extension gap, and reduces the need for ligament adjustment. The potential for anterior notching is virtually eliminated through the design of a 3 anterior flange and precise instrument design.
The Condylar Radius Design allows for a total of 30 of rotation, as well as rollback of the primary femoral component. The Maxim primary system is designed to achieve up to of flexion. All primary femoral components interchange with all primary tibial components. Posterior bone resection is replaced with implant to balance flexion-extension gap.
Modular tibial components offer excellent sizing options for better patient fit. The Maxim is indicated for use in total knee replacements both in primary and revision instances. Offered in cruciate retaining, posterior stabilized and constrained options for deficient collateral ligaments.
The Maxim Knee employs Titanium Alloy plasma spray porous coating, which offers an excellent fixation surface. Greenberg Primary Bar 3.
Ascent Primary Knee System 4. Maxim Primary Knee System 5. System delivers the ability to measure a complete To view a quick product demo, click The Lifestream Plus Cholesterol Monitor provides you with a comprehensive tool to help you monitor your cholesterol as part of your wellness program Xtra is easy to use Like all Precision One-step testing. Average for Storage of up to glucose Results in April 07,PRWEBApril 05,Howe is adding to her existing endowed scholarship Howe has also generously donated April 02,Is it due to post-market design change, production process changes, April 01,Global mobileA knee replacement is really a cartilage replacement.
The knee itself is not replaced, only the cartilage on the ends of the bones. The replacement implants include a metal alloy on the bottom of the thighbone and polyethylene plastic on the top of the tibia and underneath the kneecap.
The implant is designed to create a new, smoothly functioning joint that prevents painful bone-on-bone contact. Your surgeon may elect to replace all or part of your knee, depending on your condition and the extent to which your knee is affected by arthritis. Biomet also offers newer designs that have not been available for as long and thus do not have the same long-term data. The articular surface of the knee, where the joint motion occurs, relies on polyethylene to reduce friction and allow motion.
Polyethylene components for the knee are manufactured in one of two ways: direct compression molding DCM or machined from bar stock. Unlike machining, direct compression molding does not tear at the polyethylene. The machining process can result in areas of high stress, which may over time lead to breakdown of the polyethylene. Direct compression molding greatly reduces these high stress areas, thus creating a potentially more durable component.
In order to reduce wear in its knee products, Biomet believes an appropriate engineering step is to improve the durability of the polyethylene component. In patients with only limited knee arthritis, surgeons may elect to perform a unicompartmental partial knee replacement. Unlike total knee replacement involving removal of all the knee joint surfaces, a unicompartmental knee replacement replaces only one side of the knee joint. Knee osteoarthritis usually occurs first in the medial inside compartment as this side of the knee bears most of the weight.
In knees that are otherwise healthy, a unicompartmental approach allows the outer compartment and all ligaments to remain intact. By retaining all of the undamaged parts, the joint may bend better and function more naturally. The entire surgery is performed through a very small incision, with minimal trauma to surrounding soft tissue.
As a result, Dr. Repicci has reported that many patients leave the hospital on the day of, or the day after surgery, and are back to work within two weeks. It's the only FDA-approved, free-floating meniscal partial knee system available in the United States and has been utilized throughout Europe for more than two decades.
In a healthy knee, the meniscus serves as a shock absorber between the ends of the bones. The Oxford is the first partial implant with an artificial meniscal bearing designed to glide freely throughout the knee's range of motion, more closely replicating normal movement. The free-floating nature of the device also improves durability of the implant. Designed by Walter F. Abendschein, M. The advantage over a total knee replacement is that the healthy cartilage is not removed, making future total knee replacement easier to perform, if necessary.
Minimally invasive knee replacement patients typically recover more quickly than traditional joint replacement patients. Back to General Surgery. Los Angeles, CA.
New York, NY. Start Live Help Chat. Materials: Molded Polyethylene Demonstrates Longevity The articular surface of the knee, where the joint motion occurs, relies on polyethylene to reduce friction and allow motion. The present invention relates generally to the alignment hardware used in a surgical procedure and, more particularly, to an alignment hardware used in the implantation of a femoral prosthesis.
The implantation of knee prosthetics require the distal end of the femur to be prepared to receive a femoral component of the knee prosthetic. This preparation generally requires the resection of various surfaces of the femur to ensure the proper coupling of the knee prosthetic to the resected surfaces.
Various guides are known to assist the surgeon in locating cutting blades used to resect the femur. The location and size of cuts to the femur generally correspond to internal surfaces within the femoral prosthetics.
The location of the surfaces may change depending on the size of the prosthetics used. To this end, a femoral sizing guide is used to determine the size of the femoral prosthetic which will be implanted at the implantation site of the particular patient. Femoral knee prosthesis are made available in a range of standard sizes.
A femoral sizing guide is used to assist the selection of a standard sized femoral knee prosthetic which will best fit the requirements of a particular implantation site. The size and orientation of the implant is a function of kinematic and biomechanical considerations.
In this regard, the femoral sizing guide is used to measure the condyles of the patient's femur and specifies the proper location of guiding apertures within the femur. As such, it is necessary to provide a reliable femoral sizing guide which is configured to allow the surgeon to determine the size and proper orientation of the femoral implant. The present invention provides a femoral sizing guide which facilitates the selection and rotational orientation of the femoral prosthetic for a given resected femur.
In this regard, the femoral sizing guide is provided having an extension portion configured to be placed adjacent to a posterior condyle surface of the femur. The extension portion is pivotally connected to a base portion at a first location and coupled to a rotation mechanism which is configured to rotate the extension portion with respect to the base.
Slidably coupled to the base portion is a superstructure having a drilling guide. Further coupled to the superstructure is a graduated stylus which is configured to measure the location of an anterior condyle surface. In another embodiment of the present invention, a femoral sizing guide is provided having an extension portion which is configured to engage a posterior surface of the condyle. The extension portion is pivotally coupled to a base portion at a first location, disposed between the exterior portion and the base is a worm gear configured to rotate the extension portion with respect to the base.
A stylus is provided which is coupled to the base portion wherein the stylus measures the location of an anterior surface of a condyle. In another embodiment of the present invention, a femoral sizing guide is provided having an extension portion pivotally coupled to a base portion.
Disposed between the base portion and the extension portion is a worm gear which is configured to rotate the angle of the extension portion with respect to the base. Slidably coupled to the base is a superstructure which is configured to measure the location of an anterior side of the femur.
Disposed between the superstructure and the base is an actuator configured to move the superstructure with respect to the base. Further areas of applicability of the present invention will become apparent from the detailed description provided hereinafter. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
The present invention will become more fully understood from the detailed description and the accompanying drawings, wherein:. The following description of the embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses.
Referring generally to FIGS. The femoral sizing guide 10 is generally formed of an extension portion 12a base portion 14a superstructure portion 16 having a corresponding graduated stylus 18an actuator 20 disposed between the superstructure 16 and the base portion 14and a worm gear The femoral sizing guide 10 is configured to measure the size and general angular orientation of the condyles of a femur to allow a treating physician to interoperatively select a proper femoral prosthetic.
The feet 25 of the extension portion 12 use the posterior sides of the condylar surfaces as a reference. As the surfaces of the condyles can be degraded due to natural causes, their ability to function as a reference surface and, therefore, indexing plane can be degraded.
As such, adjustability of the feet 25 can assist in the alignment of the sizing guide. As best seen in FIGS. Although each implant provides the same basic function —replacing your diseased bone and eliminating pain—specific features set them apart. More than different knee replacement devices now exist.
Your surgeon can answer your questions and ultimately guide you to the prosthetic device that fits and works best, based on your age, weight, anatomy, and activity level. Keep in mind that manufacturers provide training and support to surgeons who use their products. This might guide a surgeon to a particular device. It also means that you may opt for a particular device based on your research but the surgeon you choose may not have access to the device or have the necessary training to implant it.
Rest assured that surgeons select implants that they believe are best for each patient. Likewise, certain devices are best used in conjunction with certain surgical approaches. If you prefer a minimally invasive surgery, you may narrow your choices as well as the surgeons who perform the procedure.
The only exception is if you enroll in a clinical study. In a clinical study, the device used has been clinically proven and the manufacturer is testing it fully to meet FDA requirements.
These tests include biocompatibility and verification that the device is able to withstand years of use while retaining its strength and shape during daily use. The most common problems revolve around knee replacements that fail to bond correctly to the bone.
This can lead to pain and additional surgery. However, even the slightest defect in manufacturing or tiniest error on the part of a surgeon can lead to severe problems.
Category: biomet maxim knee surgical technique
Study record managers: refer to the Data Element Definitions if submitting registration or results information. The data gathered will be collated and used to provide feedback to designing engineers, support marketing efforts and answer potential questions from reimbursement agencies. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies. Identical to the indications stated in the FDA approved labeling for the device cleared in k K,. K, K, K
Manufacturer Specifications - Maxim Total Knee System, Biomet
Maxim® Knee Pop-Top® Tibia vs. Regular Maxim® Knee Tibia