A comparison of polyethylene wear between cobalt-chrome ball heads and alumina ball heads after total hip arthroplasty: a 10-year follow-up

Table 1 The relationship between abduction angle and liner wear rate

Abduction angle	Wear rate of polyethylene liner	p value
Abduction angle	(mm/year ± SD)	p value
Ceramic-on-polyethylene		0.003
40°–45°	0.038 ± 0.003
>45°	0.075 ± 0.037
Metal-on-polyethylene		0.007
40°–45°	0.094 ± 0.025
>45°	0.148 ± 0.041

ISSN: 1749-799X