Unicompartmental knee replacement is indicated for patients with osteoarthritis. An unicondylar replacement cannot change the original natural alignment or ligament balance of the knee. Whether failure in unicompartmental knee arthro plasty uka is related to. A singlecenter, epidemiological study of the survivorship of. Stryker trauma nuvasive wittensteinintens limb tech, llc autogenesis, inc editorial board. Low implant migration of the sigmar medial unicompartmental knee arthroplasty. Oct 24, 20 unicompartmental knee replacement is a suitable option for degenerative joint disease of the medial tf compartment, especially if we consider the natural history of oa.
Uka surgery may reduce postoperative pain and have a shorter recovery period than a total knee replacement procedure, particularly in people over 75 years of age. Knee total knee arthroplasty brigham and womens hospital. Zimmer unicompartmental high flex knee spacer block surgical technique in uka, varusvalgus alignment is determined by the composite thickness of the prosthetic unicompartmental components. Successful outcomes with uka require proper patient selection, meticulous surgical tech. Natural kinematics the zimmer uni knee is designed to replicate the kinematics of the natural knee with normal axial rotation and posterior femoral rollback. Journey uni unicompartmental knee system figure 1 accuris uni knee system stride unicondylar knee system depuy synthes sigma high performance partial knee system uni zuk knee system djo surgical epik knee system stelkast unicondylar knee system. Depuy engineered its attune knee replacement to be one of the most advanced on the market. Unicondylar tibiofemoral replacements should be seen as real resurfacings of the knee joint. Navio surgical system surgical technique for unicondylar knee. In addition, it allows the component to be either used in an inset or onset fashion and decreases. Total knee replacement is performed on a range of patients, of all ages, with various pathologies and anatomical anomalies.
This surgery removes a part of the knee joint that is damaged by osteoarthritis, avascular necrosis, or osteonecrosis. Use of a supracondylar nail through intercondylar notch of profix primary femoral components. Total knee arthroplasty tka and unicompartmental knee replacement are intended to provide increased patient. Contemporary unicompartmental knee arthroplasty has shown resurgence in use partly because of studies reporting excellent longterm survivorship. Surgical technique sigma hp partial knee depuy synthes 3. Despite early negative reports, the procedure has evolved into a reliable and safe treatment. The popularity of unicompartmental knee arthroplasty uka for the treatment of isolated compartment osteoarthritis of the knee has risen over the past 2 decades. Total knee system introduced in 1984, the sigma knee continues a history on innovation based on clinical evidence. The pfc sigma fixed bearing knee system is intended for cemented use only. However, the sigma hp partial knee trochlear component is not the trochlea from the sigma tkr system. Did not receive their unicompartmental knee replacement from dr.
Jbjs,corr, journal of trauma, journal orthopaedic research. Pfc sigma knee system indications for use describe candidates for total or unicompartmental knee replacement include patients with a severely painful andor severely disabled joint resulting from osteoarthritis, posttraumatic arthritis, rheumatoid arthritis, or a failed previous implant. The effect of bone quality on tibial component migration. The purpose of this study was to evaluate implant migration of the fixedbearing sigma medial unicompartmental knee arthroplasty uka. The significance of surface changes on retrieved femoral components after total knee replacement. Occasionally mri studies of the knee and even diagnostic arthroscopy to directly visualize the interior of the knee may be necessary to determine if a patient is a candidate for unicompartmental replacement. Did not receive a unicompartmental knee arthroplasty using the sigma hp partial knee. Static knee alignment is associated with the risk of unicompartmental knee cartilage defects neela janakiramanan, 1andrew j. Greater activity, better range of motion and higher quality of life. Unicompartmental knee arthroplasty uka and total knee.
Unicompartmental knee replacement ukr is also called unicompartmental arthoplasty. In 2010 in the uk, earlier in the us the cruciate substituting femoral component was changed to the sigma ps variant. Anteromedial arthritis of the knee with an intact anterior cruciate ligament, as described by white et al. The depuy sigma high performance partial knee system is intended. University of minnesota gillette childrens specialty healthcare disclosure none relevant to this topic consultant. The reason for this is that, unlike a total knee replacement, where significant soft tissue releasing and tissue balancing can be carried out to correct the alignment of the knee, this is not done in unicompartmental knee replacement. The effect of bone quality on tibial component migration in medial cemented unicompartmental knee arthroplasty. Sep, 2010 the pfc sigma fixed bearing knee system is intended for cemented use only. Unicompartmental knee replacement aftercare instructions. Current fit of medial and lateral unicompartmental knee arthroplasty.
At least one study found an unusually high failure rate for attune knee implants. Unicompartmental knee replacement is a suitable option for degenerative joint disease of the medial tf compartment, especially if we consider the natural history of oa. Watch this video to learn more about using the sigma tc3 rp with mbt for revision surgeries and stem extensions. The mobilebearing mb medial oxford uka zimmer biomet, bridgend, uk is a welldocumented uka and offers good functional results pandit et al. The effect of bone quality on tibial component migration in. This content is intended for health care professionals in the united states. Zimmer biomets oxford partial knee is the most widely used partial knee in the world 4. Depuy synthes sigma high performance partial knee system uni. A singlecenter, epidemiological study of the survivorship.
This procedure is an alternative to total knee replacement for patients whose disease is limited to just one area of the knee. In these cases the remaining opposite compartment articular cartilage is physically and biomechanically intact and capable of bearing normal loads. Sizing and rotation of the femoral component can be enhanced with use of the tibial trial to create landmarks on the femur. Lateral unicompartmental knee arthroplasty through a medial approach. Surgical technique sigma hp partial knee depuy synthes note. Cicuttini1 1department of epidemiology and preventative medicine, monash university, central and eastern clinical school, alfred hospital, melbourne, vic 3004, australia. Unicompartmental knee replacement is indicated for patients with osteoarthritis isolated to the medial or lateral tibiofemoral compartments. Five year survivorship of unicompartmental knee arthroplasty using depuy sigma hp replacement, jeff almand, m.
Recently, the introduction of minimally invasive surgical mis techniques with modified surgical instruments reduced morbidity, complications and the hospital recovery time. Introduction unicompartmental knee arthritis is a difficult problem to treat, especially when it occurs in the patient younger than 55 years of age. The sigma knee embraces a wide variety of surgeon philosophies and surgical techniques, while providing function, clinical results, and a. A wide range of sizing options for both femoral and tibial components provides intraoperative flexibility and optimal patient fit. The sigma knee system offers one of todays most comprehensive, integrated knee systems. The wear of fixed and mobile bearing unicompartmental knee replacements c l brockett, l m jennings, and j fisher institute of medical and biological engineering, school of mechanical engineering, university of leeds, leeds, uk the manuscript was received on 4 june 2010 and was accepted after revision for publication on 17 november 2010. Use of slotted femoral and tibial stems without adequate bone support. About 25% of patients have isolated anteromedial oa, which remains so for many years. Partial knee replacement unicompartmental knee surgery. Refer to the navio surgical system users manual for instructions on. Wear testing for 5,000,000 cycles on knee wear simulators typically takes about 3 months, while the time required for constructing and solving one computational wear simulation was less than a week. Pdf management of unicompartmental knee osteoarthritis in middleaged patients is a challenging. Mckeever in the 1950s, followed up by both mckeever and macintosh introducing metallic tibial components that.
Navio surgical system surgical technique for unicondylar. Sigma high performance partial knee system sigma high performance partial knee system the sigma hp partial knee is a high. Contemporary unicompartmental knee arthroplasty request pdf. Unicompartmental knee arthroplastyprinciples and practice mark t. Uka has a higher revision rate than total knee arthroplasty. Sigma rotating platform knee system surgical technique the surgeon design team and depuy wishes to thank the following international surgeon evaluation team for their valuable contributions to the development of the p. Partial knee system oxford partial knee zimmer biomet. Low implant migration of the sigma medial unicompartmental. It should, in theory, also restore the normal kinematics of the knee. Unicompartmental knee arthroplasty uka has shown good clinical outcome and implant survival for patients with medial osteoarthritis oa cheng et al.
Revision surgical technique using sigma tc3 rp with mbt. The sigma high performance unity knee resurfacing system is composed of unicompartmental femoral components, patellofemoral trochlear components, unicompartmental tibial components and patellar components. Pickering at mississippi sports medicine and orthopaedic center. The evolution of orthopaedic surgery rsm press lakdawala, a. Unicompartmental knee arthroplasty uka is a surgical procedure used to relieve arthritis in one of the knee compartments in which the damaged parts of the knee are replaced.
Indexing metadatadescription surgical intervention. Osteoarthritis is a condition where the joint surface of your knee wears out, causing problems with the cartilage in your knee. In vivo determination of kinematics for subjects having a zimmer unicompartmental high flex knee system. Download acrobat pdf file 83kb conflict of interest statement. Uka is a regularly used treatment for patients with medial osteoarthritis oa of the knee. While designing the persona knee, we used a combination of advanced research tools to study hundreds of knees, creating a global bone atlas. The existing design inherits the clinical results of the phase i and ii implants, which have now demonstrated 20year survivorship 5 in the literature. Purpose the purpose of this study was to evaluate implant migration of the fixedbearing sigma medial unicompartmental knee arthroplasty uka.
Varies based on the amount of time that has passed since unicompartmental knee arthroplasty uka in the first week post surgery, the patient may present with pain during weightbearing and range of motion rom, an anterior or anteromedial knee incision with suturesstaples, and knee effusion and erythema. Thereafter, joint degeneration progressively leads to osteophyte development in the notch. Equal tibial component fixation of a mobilebearing and. Knee arthroplasty design in the united states has its roots at bwh with the first bicompartmental knee used in the 1960s.
Unicompartmental knee arthroplasty uka has a more than 30year history in the treatment of arthritis of one compartment of the tibiofemoral joint. The oxford partial knee uses arcom direct compression molded polyethylene for proven wear resistance 14,15 and has been clinically tested for over 35 years. A singlecenter, epidemiological study of the survivorship of the depuy sigma hp unicompartmental knee prosthesis. Primary unicompartmental knee replacement6 clinical results the zimmer unicompartmental high flex knee system is based on the established implant design of the mg unicompartmental knee system. Aug 20, 2010 the mg unicompartmental knee system provides a versatile system that permits normal biomechanical function, provides secure fixation, and facilitates precise implantation. Static knee alignment is associated with the risk of. Results of unicompartmental knee arthroplasty at a minimum of ten years of followup. Sigma knee system, nonporous cruciate retaining femoral component, 73 mm ml 69 mm ap, 5 left, sterile, depuy orthopaedics. Pdf the wear of fixed and mobile bearing unicompartmental knee. The wear of fixed and mobile bearing unicompartmental knee. Oxford unicompartmental knee manual of the surgical technique. The amount of tibial bone resection is variable while the amount of.
Zimmer unicompartmental high flex knee system brochure. G total and unicompartmental knee prostheses essential product information important this essential product information sheet does not include all of the information necessary for selection and use of a device. As no single arthroplastic approach is appropriate for every knee, the surgeon must be prepared, as the situation indicates, to preserve or substitute for the posterior cruciate ligament. Unicompartmental knee replacement page 7 subacromial decompression oxford unicompartmental knee replacement depending on how much of your knee is affected by arthritis, surgeons can sometimes perform a partial knee replacement also known as a unicompartmental knee replacement, ukr as opposed to a total knee replacement tkr. Pdf unicompartmental knee replacements ukr are an option for surgical intervention for the. Did not receive a unicompartmental knee arthroplasty between august 21, 2008 and october 31, 2009. The aim of unicompartmental knee replacement is to allow the mechanical access to load the replaced compartment. The amount of tibial bone resection is variable while the amount of distal femoral bone resection is constant. In unicompartmental knee replacement also called partial knee replacement only a portion of the knee is resurfaced with metal and plastic components. It may be desirable to leave up to 2 mm of laxity when subject to lateral stress at 20 degrees flexion. But patients have filed hundreds of reports claiming that the devices loosened. The first pfc total knee system was designed and implanted by dr. Oxford unicompartmental knee manual of the surgical.
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