Wear Scar Similarities between Retrieved and Simulator-Tested Polyethylene TKR Components: An Artificial Neural Network Approach

Table 1

Demographic information of liner hosts (revision and postmortem).

Implant source ()	Gender ()	Side ()	In situ time (mo.)	Cause of failure ()
Revisions (54)	Females (22); Males (26); Unknown (6)	Left (24); Right (23); Unknown (7)	Range (1–108); Mean (26); Unknown (16)	Infection (10); Maltracking (9); Loose (9); Instability (5); Synovitis (2); Fracture (1); Osteolysis (1); Failed liner (1); PE wear (1); Unknown (15)
Postmortem (21)	Females (13); Males (8)	Left (11); Right (10)	Range (19–144); Mean (79)	Autopsy (21)
Simulator (6)	Not applicable	Left (6)	60 months	Not applicable
Heavily delaminated (10)	Females (5); Males (4); Unknown (1)	Left (7); Right (3)	Range (24–130); Mean (73); Unknown (3)	Instability (2); Polyethylene wear (2); Tibial subsidence (2); Painful tibial component (1); Unknown (3)

1 million cycles representing 12 months of level walking.
PE = polyethylene.