SophisticatedProductsinOMFSurgery Distraction Osteogenesis Thelengtheningofbonesbygradualdistractionhas beenexecutedsystematicallyanddescribedforthe firsttimebytheRussiansurgeonProf.GavrilIlizarov (Ilizarov1975,Ilizarov1988).Theprincipleistostretch callusformedafteraosteotomyatarateof1mmper day.Thisstimulusactivatestheforcesofspontaneous healingofthebone,sothatcontinuouslynewcallus isproducedandtheboneislengthened.