Nineteen patients with juvenile chronic arthritis underwent 29 resurfa
cing hip arthroplasties. In 22 the original all-plastic Wagner acetabu
lar component was used and in 7 the metal-backed Wagner-Tillmann compo
nent. After a mean of 11 (range 8-13) years 19 of the Wagner acetabula
r components had been revised and another 2 showed radiographic loosen
ing. After a mean of 7 (range 5-9) years no metal-backed acetabular cu
p had been revised and only 1 was definitely loose.