Abstract
In the modern era of total knee arthroplasty (TKA), a majority of orthopedic surgeons
utilize metal-backed tibial (MBT) components rather than nonmodular designs, such
as all-polyethylene tibial (APT) components. Interestingly, current clinical evidence
does not explain this disproportionate practice by surgeons. The shift in surgeon
preference from APT to MBT components occurred in the 1980s following unfavorable
results from early studies with APT. However, results from current studies that have
revisited the APT versus MBT component comparison demonstrate similar implant survivorship
and patient outcomes. Despite equivalent survivorship and improved cost-efficiency,
APT components have not achieved equivalent utilization rates with MBT. This review
of the current literature, as well as the advantages and disadvantages of APT components,
will outline a rationale for the role of APT components in today's cost-driven, outcomes-oriented,
patient-centered health-care system.
Keywords
total knee arthroplasty - all-polyethylene tibial components - metal-backed tibial
components - bearing surfaces