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R. Barry Sorrells, M.D. and A. Seth Greenwald, D.Phil.(Oxon)

Mobile-bearing knee designs represent an alternative to conventional fixed-bearing TKR. These implants potentially offer a substantial increase in articulation conformity, with a beneficial distribution of the proximal and distal contact stresses and a decrease in the potential for polyethylene wear. However, even with these apparent biomechanical advantages over fixed-bearing designs, the use of mobile-bearing knee implants has remained relatively rare in the U.S., especially when compared with that in other countries. The issue of FDA regulation, the suspected technical difficulty of implantation and the cost of the devices all have been factors that have impeded their use. In this JBJS/VJO supplement to the article, Doctors Sorrells and Greenwald discuss these issues and Dr. Sorrells provides surgical video detailing his technique.

Material Covered

• Intermediate-term Results
• FDA Status
• Technical Difficulty
• Surgical Pearls
• Design Benefits
• Avoiding Complications

See the Corresponding JBJS Article:

R. Barry Sorrells, Paul E. Voorhorst, Jeffrey A. Murphy, Maryrose P. Bauschka, and A. Seth Greenwald

Uncemented Rotating-Platform Total Knee Replacement: A Five to Twelve-Year Follow-up Study.
J. Bone Joint Surg. Am., Oct 2004; 86: 2156 - 2162. [Abstract] [Full Text]

• Total run time: 32:00 minutes
• Catalog Number: 5091
• Publication Date: March 2005
• Formats: NTSC, PAL, and DVD

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