A new version of the cage holder 026hlc1 was released before the new versions the associated impactors 318hlp1 and 378hls1 were released.The designs of the new cage holder 026hlc1 is not compatible with the previous design of the impactors.If this instrument has reached the surgery room, it would have not been possible to implant the lumbar cage.In that case, an intervention would have been required to prevent permanent damage (absence of disc).