Treatment of facial lipoatrophy with dermal injections polylactic acid (Newfill TM) is a safe procedure and has been now widely used with a good efficacy. However, this therapy is not effective in all treated patients and the benefit of the injections may decrease with time necessitating re-injections several months after the first sets of injections. In this study we would like to compare the efficacy and safety of Eutrophill(polyacrylamid gel), a resorbable filler compound versus Newfill in a comparative, randomised, multicenter trial. Primary endpoint will be the self-perception by the patient with a visual analogue scale (VAS index). Secondary endpoints are a quality of life questionnaire (MOS-HIV), the a-NBC questionnaire (perception by the patient and by the doctor of the severity of the lipoatrophy), the measure of the dermal thickness and cheek skin fold as assessed by the Skinfold Caliper, the ordering of digital photographs and the evaluation of the dermal thickness by CT scan.