Does Metal Transfer Differ on Retrieved Ceramic and CoCr Femoral Heads?

Table 3

Dimensions of the most prominent mark for the three most prevalent primary transfer patterns. Sample size was determined by the amount of femoral heads per cohort exhibiting each pattern (longitudinal stripe, random stripe, and random patches, resp.). Data is reported as the mean ± standard deviation.

	M-PE			C-PE			C-C
	Length (mm)	Width (mm)	Height (µm	Length (mm)	Width (mm)	Height (µm)	Length (mm)	Width (mm)	Height (µm
Longitudinal stripe	12.3 (11.7)	1.9 (1.3)	1.2	9.1 (10.3)	1.5 (0.9)	0.5 (0.2)	16.2 (5.0)	2.2 (1.7)	0.4 (0.6)
Random stripe	7.3 (5.0)	0.7 (0.5)	1.8 (1.9)	14.5 (2.9)	1.2 (1.9)	1.0 (1.1)	5.9	1.2	2.3
Random patches	2.6 (2.1)	1.2 (1.0)	1.9	3.6 (3.8)	1.2 (2.9)	0.7 (0.9)	6.2	3.1	0.9

Height only available for 10 C-C heads and 13 M-PE heads, with insufficient data to present and interquartile range in some cases.