Table 3.

Reported ITPIE outcomes

Authors	Diagnosis	Number of patients	Followup time (average)	Failure rate
Babis et al. [1]	Instability	27	5.8 years	44% revised or painful
Babis et al. [1]	Multiple	56	4.6 years	25% revised
Babis et al. [2]	Stiffness	7	4.2 years	86% revised or painful
Brooks et al. [4]	Instability	14	56 months	29% unstable
Engh et al. [5]	Wear	48	7.4 years	17% revised
Engh et al. [5]	Severe wear	22	less than 5 yrs	27% revised
Griffin et al. [6]	Wear/lysis	68	3.6 years	16% revised or lysis
Jensen et al. [8]	Multiple	27	40 months	15% revised
Current study	Multiple	42	5.6 years	29% revised and 21% painful

ITPIE = Isolated tibial polyethylene insert exchange.