Frequently Asked Questions

What is a mobile bearing knee?

The plastic portion of a tibial component is usually fixed to the metal tibial base plate. In some knee designs , the plastic component is allowed to "float" on the metal tray. There is a hope that these types of implants may last longer before the plastic is worn out. However , despite heavy advertising there is currently no convincing evidence that these are more durable or allow greater range of motion than a fixed bearing total knee replacement. Despite the media hype as "new" implants , these implants have been around for many years. In fact , I was involved in a study of the Depuy LCS mobile bearing knee versus the Howmedica PCA fixed bearing knee while I was a resident at Johns Hopkins Hospital. We found no significant differences in the complications , performance , or durability of these two implants at four years follow up after surgery. However , I continue to be intrigued by the design concepts of a mobile bearing and hope to start a comparative study of fixed versus mobile bearings in the future.

Phone Consultation

If you are interested in determining if you are a candidate for surgery, please mail your completed new patient forms to the office and include a digital x-ray.

Dr. Gross will call you back to discuss your options.

Download New Patient Forms

Located in South Carolina

Irmo Office

1013 Lake Murray Blvd.
Irmo, SC 29063

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Columbia Office

1910 Blanding St.
Columbia, SC 29201

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