Analysis of Carbon Fiber Reinforced PEEK Hinge Mechanism Articulation Components in a Rotating Hinge Knee Design: A Comparison of In Vitro and Retrieval Findings

Table 2

Overview of clinical data, implant type, and size for retrieved CFR-PEEK rotating hinge knee components.

Specimen	Gender	Age at implantation [years]	Treated side	Implant type	Implant size (gliding surface height)	Retrieved CFR-PEEK components	Time in vivo [months]	Reason for revision
R51	F	71	Left	CoCrMo	2 (10 mm)	Rotation axis bushing	47.0	Infection/sepsis
R52	F	76	Right	CoCrMo	2 (14 mm)	Rotation axis bushing	12.0	Infection/sepsis
						Flexion axis bushing	41.0
						Femoral flanges	41.0
R53	F	79	Left	CoCrMo	2 (20 mm)	Rotation axis bushing	54.0	Aseptic loosening
						Flexion axis bushing	54.0
						Femoral flanges	54.0
R54	F	Unknown	Left	CoCrMo	2 (12 mm)	Rotation axis bushing	12.0	Poor mobility, postoperative
						Flexion axis bushing	12.0
						Femoral flanges	12.0
R55	M	55	Left	CoCrMo	3 (10 mm)	Rotation axis bushing	43.0	Infection/sepsis
R60	F	54	Left	CoCrMo	2 (14 mm)	Rotation axis bushing	40.5	Aseptic loosening
						Flexion axis bushing	40.5
						Femoral flanges	40.5
R61	M	Unknown	Unknown	CoCrMo	3 (12 mm)	Rotation axis bushing	55.0	Aseptic loosening and bone perforation with stem
R63	F	Unknown	Left	ZrN	2, customized (12 mm)	Rotation axis bushing	60.0	Aseptic loosening
						Flexion axis bushing	60.0
						Femoral flanges	60.0
R67	M	65	Left	CoCrMo	3 (10 mm)	Rotation axis bushing	20.0	Aseptic loosening
R70	Unknown	Unknown	Left	CoCrMo	2 (10 mm)	Rotation axis bushing	Unknown	Unknown
						Flexion axis bushing	Unknown
						Femoral flanges	Unknown
R71	Unknown	Unknown	Right	CoCrMo	1 (10 mm)	Rotation axis bushing	22.0	Aseptic loosening
						Flexion axis bushing	22.0
						Femoral flanges	22.0
R72	Unknown	Unknown	Right	CoCrMo	3 (10 mm)	Rotation axis bushing	18.0	Infection/sepsis
						Flexion axis bushing	20.0
						Femoral flanges	20.0