Modular tibial plate for minimally invasive total knee arthroplasty

Abstract
Purpose Aim of the study was to evaluate the clinical and
radiological results of a modular tibial plate purposely
designed for minimally invasive total knee arthroplasty.
Methods We prospectively assessed the results of 200
primary total knee replacements performed through a
minimally invasive approach using a dedicated modular
tibial plate, a posterior stabilized knee prosthesis, and a
fixed bearing in 175 patients (139 women and 36 men),
undergoing surgery between 2005 and 2009 presenting
knee osteoarthritis. Median age at the time of surgery was
69 years (52–88).
Results No patients were lost at follow-up. 3 implants
underwent revision. At a mean 3 years (1–5 years) followup,
the HHS and KSS score showed a significant
improvement, increasing, respectively, from a median
value of 35–95 (78–100) and from 31 points in the ‘‘knee’’
and 45 points in the ‘‘function’’ score to a median of
95 (83–100) and 94 (81–100). Using the Kaplan–Meier
method, the survival rate at 5 years was 97.9% with a 95%
confidence interval.
Conclusion The implant showed good results in either
clinical or radiological assessment at a short/midterm follow-
up with a high survival rate.
Level of evidence Therapeutic study, Level IV.