What is the TOPS Study?

It is a research study offered to volunteers who suffer from spondylolisthesis, spinal stenosis and additional spinal symptoms. Physicians will  be comparing the TOPS to lumbar fusion in a randomized  clinical trial. This pivotal study is designed to determine the  safety and efficacy of the TOPS implant after which the U.S.  Food and Drug Administration (FDA) will determine if the  device will become available to the general public.

Am I eligible for the TOPS study?

  • Radiating leg pain
  • Greater leg / buttock pain than back pain
  • Severe pain sets in when walking as little as 100 yards or 2 minutes
  • Pain reduces when sitting, bending forward, or leaning over a shopping cart
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