Provisional results of the CLS cup using IDES.

A review was made of two series of CLS cups, fixed by expansion and anchoring in the acetabular periphery, in order to ascertain the usefulness of the International Documentation and Evaluation System. One hundred and fifty cases, from a series of 180, were documented and implanted by the same surgical team in Barcelona. The provisional results are described with a follow up of between one and 5 or more years. These were compared with 625 cases documented in the Berne Foundation with a similar follow up. The results were similar and the series studied is justified because of its documentary accuracy. The possible advantages of the CLS cup are discussed.