Question: is this a 2) strong advice, 1) weak advice 0) no advice?

Our review of 300 consecutive primary acetabular replacements mixing ZweymuÈller grit-blasted screw rings of first and second generation showed, with loosening as the endpoint, a 99.1% survival rate at the 7 to 8 year follow-up [4]. 
user
This is no advice
assistant