•Initial interlock
•Bone metabolism
•79 % survival at 25 years
(Sochart/Porter1998
Lehtimaki J Arth 199 14 657-61)
•Increased loosening
Ahnfelt Acta Orth Scand 1990 61 238 1-26 (Swedish Arth
Register)
•No Difference
Furnes
JBJS 83B 2001 579-586
(Norwegian Arth Register)