Australian Market for Knee Replacement Devices 2016 – MedCore
Knee replacement procedures are the most common large joint replacement procedures in the United States. The knee is a hinge-like joint that comprises the femur (thighbone), tibia and fibula (shin bones) and patella (knee cap). The patella floats in the patellar tendon over the articulation of the femur and tibia. Like the hip, the knee is a joint that bears the entire weight of the body and is prone to degenerative wear. The femur articulates with the tibia by the two condyles, which are large rounded protrusions at the end of the thighbone. There is a medial and a lateral condyle. The majority of the bodys weight is carried over the medial portion of the knee. Within the knee joint, there are two cartilaginous rings known as menisci. The femoral condyles rest and pivot on these menisci and act as shock absorbers that prevent bone-on-bone wear. The menisci are prone to tearing, especially with sudden twisting motions, and do not heal readily.
- Year: 2016
- Scope: 2012-2022
- Region: Australia
- Published Date: 11/01/2015
- Pages: 57
- Type: MedCore
Knee replacement was first performed in 1968. As joints do not regenerate readily, total replacement is an eventuality when discomfort and decrease in mobility become serious enough issues for prospective patients. The three major segments of the knee replacement market are total joint replacement, partial joint replacement and knee revision.
220.127.116.11 Total Knee Replacement
Total knee replacement involves replacing the entire jointboth the tibial and femoral sides. As with other areas of reconstructive surgery, total knee replacements are more popular than partial joint replacements.
18.104.22.168 Partial Knee Replacement
Unicondylar joint replacement provides an alternative to total knee replacement when only part of the knee is affected by wear or disease. This allows for less tissue displacement and a smaller incision. However, the disadvantage to partial replacement is that a total joint replacement may become an eventual necessity. That is to say, the conditions that lead to wear for one side of the joint may continue to affect the healthier side.
22.214.171.124 Patellofemoral Replacement
Patellofemoral replacement is infrequently used to replace the cartilage surface of the patella. These devices are used for a limited group of patients, as the majority of doctors in the U.S. prefer to use total joint implants rather than partial implants that may need to be revised to total joint replacements at a later date.
126.96.36.199 Interpositional Knee Implants
Interpositional knee implants are a form of partial knee implant and are somewhat analogous to resurfacing devices in other reconstructive areas. These devices are disc shaped and are used to replace worn cartilage. The devices were sold by Zimmer under the UniSpacer brand, ConforMIS under the iForma brand and Advanced Bio-Surfaces under the OrthoGlide brand; however, in 2011 most of these brands were no longer sold. The procedure time was an hour or less, which is less time than a traditional partial knee implant, and the purpose of these devices was to delay the need for a partial or total joint procedure. However, problems associated with the products dislocating in the knee compartment led to poor patient outcomes and eventually led to the discontinuation of many of these devices by 2011.
188.8.131.52 Knee Revision
Knee revision procedures involve replacing worn implanted joints with new hardware. To be precise, it is not the implant itself that is worn but the quality of its adhesion to the patients existing bone. Conservative estimates of implant longevity are around 15 to 20 years, with many implants lasting longer than this period. The rate of revision is expected to climb as the number of primary implanted devices increases.
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