The effect of a jet abrasive instrument (Prophy Jet) on root surfaces

A Prophy Jet instrument was tested in order to analyze the abrasive effect and surface alterations on human root cementum and dentine. Photomicrographs from scanning electron microscopy (SEM) and a profilometer technique for depth analyses were used for evaluation. The results of the experiments demonstrated that the Prophy Jet technique had an abrasive effect reaching about 25 microns in depth after 30 seconds treatment. The root surface, cementum as well as dentine also became rougher after treatment judging from the SEM micrographs. Clinical advantages and disadvantages by using the Prophy Jet instrument will be discussed. Further studies seems to be justified concerning the jet abrasive technique.