[Proof, by a double-blind study, of the efficacy of synoviorthesis by erbium-169 in rheumatoid arthritis of the fingers].

: A double-blind study (201 metacarpo and interphalangeal joints) on the effectiveness of the synoviorthesis shows the significant value of the 169-Erbium, compared with intra-articular placebo or corticotherapy. The treatment gives an improvement in 58% of the cases (p less than 0.01) (stade 1:80,7%), by destruction of the rheumatoid pannus, begins after 3 months and develops for one year and more.