What is a constrained knee replacement?

What is a constrained knee replacement?

Constraint is defined as the effect of the elements of knee implant design that provides the stability needed to counteract forces about the knee after arthroplasty in the presence of a deficient soft-tissue envelope. Determining the amount of constraint necessary can be challenging.

What does constrained prosthesis mean?

Constraint. definition. the ability of a prosthesis to provide varus-valgus and flexion-extension stability in the face of ligamentous laxity or bone loss.

What is patellar clunk syndrome?

Patellar clunk syndrome occurs when a fibrous nodule develops just proximal to the patellar button. At approximately 30 degrees to 45 degrees from full extension, the nodule catches the anterior flange of the femoral prosthesis, resulting in the clunk and a painful range of motion.

How long do hinged knee replacements last?

Rotating hinge knee implants have a 10-year survivorship in the range of 51% to 92.5%. Complication rates of rotating hinge knee implants are in the range of 9.2% to 63%, with infection and aseptic loosening as the most common complications.

How long is recovery from knee revision?

Knee Revision Recovery It may take up to 12 months to fully recover. Most people will feel comfortable going back to work and resuming some of their normal activities three to six months after the surgery (this may not include exercise or other strenuous physical activities).

What is a primary TKA?

Primary total knee arthroplasty (TKA) is a reliable procedure with reproducible long-term results. Nevertheless, there are conditions related to the type of patient or local conditions of the knee that can make it a difficult procedure.

What is constrained condylar knee?

Constrained condylar knee (CCK) implants are commonly used in a revision setting. They are designed to fix the prosthesis to the host bone at epiphysis and diaphysis to provide good construct stability and provide flexibility to balance the knee in the coronal and sagittal planes.

Why is my knee clunking?

It usually happens when air bubbles develop in body tissues, but it can also happen when the tendons or ligaments snap over the bony structures in the knee, or as a result of patellofemoral pain syndrome (PFS), torn cartilage, or osteoarthritis (OA). Other people may or may not be able to hear the sound.

What can I expect after knee revision surgery?

You may be discharged 3 to 5 days after your knee revision surgery. You can then continue recovering at home or at a rehabilitation facility, depending on your needs. You will most likely leave the hospital using crutches or a walker. If your progress is going well, you can switch to a cane typically after 6 weeks.

How common are TKA?

The number of revision TKA is rising in many countries, with 22,403 procedures in the United States [2], 15,232 in Australia [3], 5873 in the UK [4] and 17,677 in Germany in 2015 [5].