Around the year 2000, Dr.Alain Tenenbaum facial plastic surgeon and Dr in Sciences (expert in signal treatment) thought to invent some products and techniques where - the entries were chemical and eliminated completely through the feces in 24 hours - the exists would be only mechanical like a plasty of the tissues,reshaping them in the 3 D way with directions and senses the physician would choose . like a pexy lifting the tissues like a tension giving back the lost tension of the tissues through aging and all this without adding or loosing volume, beeing the most conservative as possible. The ,, black boxes,, between the entries and the exists should be viscoelastic elastomeres and at 1 st stage such techniques could be applied to muscles. Of course,the entries should not create damages of the tissues. Then from 2000 to nowadays the products, the techniques as the indications, side effects, contra indications have got a big development dued to the clinical studies , which have been multicentric thanks to the help of many colleagues who invented themselves some indications. Also Sir.Mauro Tiziani, ex red cross surgical chief nurse who studied also molecular biology has emitted some hypothesis which seem to match with the help of clinical studies.