Knee implants designed for women.
Position | Orthopedics - University of Texas (Dallas |
Orthopedic surgeons at the University of Texas Southwestern Medical Center, Dallas, are among the first to use knee implants specifically designed to fit a woman's anatomy. The implant addresses three distinct and scientifically documented shape differences in women's and men's knees.
Designed using three-dimensional computed tomography imaging, this high-flex knee more closely mimics the joints and inner workings of a woman's anatomy. 'q-his is one in a series of technical improvements in the design of knee implants that is long overdue," observes Robed Bucholz, chairman of orthopedic surgery.
During total knee replacement surgery, or adhroplasty, surfaces of the thighbone (femur), shinbone (tibia), and kneecap (patella) are replaced with a metal-and-plastic implant. Traditionally, the implants have been designed based on men's knees. For women, smaller implants were used, but size did not resolve the anatomical differences, which sometimes accounted for pain and discomfort and an "awkward" feeling. Researchers have found numerous shape differences between the average male and female knee. The new replacement addresses three gender-specific issues:
Narrower shapes. Impact size typically is based on the front-to-back measurement to allow the knee to move and flex properly. In women, however, an implant that fits from front to back can be too wide from side to side, sometimes causing it to overhang the bone.
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