3D-printed titanium metaphyseal cones may yield excellent survivorship for revision TKA
Key takeaways:
- Use of 3D-printed titanium metaphyseal cones was associated with excellent survivorship after revision knee arthroplasty.
- Patients had low rates of aseptic loosening and re-revision at 5 years.
According to published results, use of 3D-printed titanium metaphyseal cones was associated with excellent survivorship and low rates of aseptic loosening and re-revision at 5 years after revision total knee arthroplasty.
Christopher N. Carender, MD, and colleagues at the Mayo Clinic analyzed outcomes from 740 3D-printed titanium metaphyseal cones (Triathlon total stabilized cones, Stryker) that were used in 533 revision TKAs from a tertiary care academic institution.
According to the study, the most common reasons for index revision included aseptic loosening (n = 199), periprosthetic joint infection (n = 183) and instability (n = 84).
At 5 years, Carender and colleagues found a 1% cumulative incidence of cone revision for aseptic loosening, a 6% cumulative incidence of cone revision or removal and a 14% cumulative incidence of any TKA re-revision.
Carender and colleagues noted the most common reasons for cone revision were PJI (n = 23), periprosthetic femoral fracture (n = 3), arthrofibrosis (n = 3) and aseptic loosening of the femoral component and femoral cone (n = 3). In addition, they noted the most common reasons for any TKA re-revision were PJI (n = 38), persistent drainage (n = 6) and extensor mechanism disruption (n = 3).
“These data suggest that 3D-printed titanium metaphyseal cones achieve durable metaphyseal fixation at short-term follow-up after revision TKA,” Carender and colleagues wrote in the study.
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