Clinical and radiographic evaluation of a monoblock tibial component.

Modular tibial components are the clinical standard in total knee arthroplasty despite the lack of evidence of improved function and longevity when compared with monoblock implants. This study describes the minimum 5-year outcomes for 125 total knee arthroplasties performed with monoblock tibial components in 101 patients. No patients were lost to follow-up. Average Knee Society Score was 87.1 at a mean follow-up of 5.2 years. Clinical and radiographic follow-up showed all components to be stable, no implants at risk of loosening, no observable osteolysis, and no observed change in bone density. Survivorship free of revision for tibial component loosening was 100% at 5 years. These results show excellent midterm durability of a partially cemented porous tantalum monoblock implant with uncemented pegs.