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Orthopaedic Data Evaluation Panel (ODEP)

The Orthopaedic Data Evaluation Panel (ODEP; was set up in 2002 to provide information about the success of hip replacements. Since 2014 knees have been included in the database. The panel includes an independent group of leading UK surgeons and non-clinical experts with a deep understanding of the orthopaedic industry. The panel review submissions from manufacturers covering the available clinical evidence to support their knee replacement designs and rate the strength of the evidence provided, resulting in an ODEP rating.

The ODEP rating system rates implants after three, five seven and ten years of use with a number, a letter and optionally a star. The number denotes for how many years after surgery a device is rated and the letter demotes the strength of evidence – ‘A’ denotes strong evidence for a high number of patients actively monitored.

To achieve the highest rating after ten years (10A*) a knee implant must have:

  • been used in more than 500 patients with at least 400 reaching 10 years,
  • a revision rate of less than 5%,
  • not changed the design during that period,
  • had no reports of poor performance,
  • been used by three or more clinics outside of co-developers.

Hospitals and surgeons around the world use the ODEP ratings to review whether or not to use a device.

In respect of newer designs, it is worth noting that knee designs with a 3A or 5A rating for example, do not necessarily perform worse than a device with a 10A rating. It is more likely that the device is new and does not yet have 10 years of data. In fact a 5A rating indicates that the device is on track to achieve a 10A* rating and it might actually be performing better than a 10A*-rated device.



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