The knee is a complex, mobile joint. Knee joints are the largest joints of the body, and they differ in shape and size from other joints. A customized knee replacement uses specially designed implants that are made to fit the unique knee of the patient. Traditional knee replacement requires the surgeon to attempt to match prostheses to fit the knee.
How many knee replacements are performed each year?
In the United States, around 4.7 million people have a total knee replacement. Prevalence increases with age, with around 8% have a history of total knee replacement. Women are more likely to have this operation than men (3 million: 1.7 million).
Why are customized knee implants important?
Once the Arizona knee surgeon selects the implant, the technique requires precision structuring so the implant fits snugly with your individual bone structure. An improper implant fit could result in residual issues that may cause problems after surgery.
Customized knee replacements are an innovative approach to correctly knee problems. The need for a precision implant fit has driven this new trend. Manufacturers now offer customized and personalized implants that are appropriate for gender and the individual knee. In a 2010 study, customized implants were found to reduce sizing problems during surgery, and also, found to replicate the curvature of the patient’s knee, giving a more natural feel to the replacement.
How are customized knee prostheses made?
Customized knee implants are created from CT and MRI scan data obtained from the patient. This assures the implant matches the natural curves and shape of the knee. Knee implant manufacturers use specific technology to change the images of the knee into a 3D model, which is used to make an implant that matches the patient’s knee. Using scan data, the manufacturer can customize the implant using computer-assisted surgical instrumentation utilized by the surgeon during the procedure.
Why are women’s implants different than men’s?
Called gender-specific knee replacement, women are more petite and require special sized implants. A regular, traditional implant is designed for men, which means the implant for a woman could overhang on the bone at the sides. This could cause soft tissue interference or mid-flexion instability. For some patients, over-sized implants may cause pain and discomfort long after healing is complete. For this reason, new implants are used to accommodate the knee, which is smaller in women from side-to-side and from front-to-back. This reduces implant misfit and persistent knee pain.
Why do the differences between men and women make knee replacement difficult?
Researchers have found many differences between women’s knees and men’s. The gender-specific implants are based on research that shows:
- Women’s knees have a thinner profile at the front.
- Women’s knees have a distinct shape that accommodates the different angle between the knee and hip.
- Women’s knees have a different contour.
Some researchers believe the differences in knee shape and size have less to do with gender and more to do with genetics. Certain ethnic influences tend to determine knee joint sizes.
Orthopedic and Sports Performance Institute offers customized knee replacements that have an amazing fit with exceptional outcomes. The total knee replacement surgeons in Arizona work with patients from all over the Valley including Gilbert, Mesa, Chandler, Queen Creek and Maricopa AZ.
Most insurance is accepted, call today to meet with the top knee specialists in AZ!
Bourne, et al; Patient Satisfaction after Total Knee Arthroplasty. Who is Satisfied and Who is Not? Clinical Orthopedics and Related Research; 2010, 468: 57-63.
Mahoney, et al; Overhang of the Femoral Component in Total Knee Arthroplasty: Risk Factors and Clinical Consequences. The Journal of Bone and Joint Surgery; 2010, 92: 1115-1121