▁an ▁extended ▁sh ank ▁to ▁allow ▁extension ▁into ▁deeper ▁po ckets ▁( > 5 mm ). ▁They ▁also ▁have ▁a ▁th inner ▁bla de ▁for ▁heavy ▁or ▁t ena cious ▁calculus . ▁M ini ▁f ives ▁are ▁a ▁modification ▁of ▁after ▁f ives ▁as ▁their ▁bl ades ▁are ▁half ▁the ▁length ▁to ▁allow ▁for ▁easier ▁insert ion ▁and ▁adaptation ▁into ▁deep ▁po ckets , ▁fur c ations , ▁development al ▁gro ov es ▁and ▁line ▁angles . ▁They ▁also ▁contribute ▁to ▁a ▁reduction ▁in ▁t issue ▁tra uma . ▁Ul tr ason ic ▁scal ers ▁move ▁in ▁an ▁elli pt ical ▁motion ▁and ▁do ▁not ▁have ▁a ▁cutting ▁edge . ▁They ▁operate ▁at ▁a ▁frequency ▁of ▁ 3 , 0 0 0 - 8 , 0 0 0 ▁cycles ▁per ▁second ▁and ▁use ▁magnet ost rict ive ▁or ▁pie zo - elect ric ▁technology , ▁thus ▁helping ▁remove ▁pla que ▁and ▁calculus ▁while ▁reducing ▁operator ▁w rist ▁fat igue . ▁ ▁See ▁also ▁▁ ▁S cal ing ▁and ▁root ▁plan ing ▁ ▁To oth ▁clean ing ▁ ▁To oth ▁pol ishing ▁ ▁Or al ▁h yg iene ▁ ▁References ▁▁ ▁Category : D ent istry ▁procedures <0x0A> </s> ▁B ero e ▁is ▁a ▁Bulgar ian ▁professional ▁football ▁club ▁which ▁are ▁based ▁in ▁St ara ▁Zag ora . ▁During ▁the ▁ 2 0 1 7 / 1 8 ▁campaign ▁they ▁will ▁be ▁compet ing ▁in ▁the ▁following ▁compet itions : ▁First ▁League , ▁Bulgar ian ▁cup . ▁ ▁Friend lies ▁ ▁Compet itions ▁