Encoding Scratch and Scrape Features for Wear Modeling of Total Joint Replacements

Table 2

Comparison of average roughness (𝑅_𝑎) values on samples displaying scrape damage.

Femoral head	Number of scrape regions	Average scrape area (mm^2)	𝑅𝑎 (μm)
			Mean ± SD	Min	Max
2	22	1.57	0.28 ± 0.27	0.03	1.21
3	104	1.20	0.17 ± 0.11	0.01	0.55
6	68	5.09	0.21 ± 0.08	0.05	0.39
8	71	8.03	1.12 ± 1.25	0.03	4.20
9	44	1.05	0.26 ± 0.15	0.05	0.65