FKG-Race brochure-01B-AN - Endodonzia Dr. Mauro Venturi Home

8What you mustknow• The flexibility of a NiTi instrumentdecreases in proportionto the increase of its conicity(an instrument n° 025 with anISO conicity of 2% is more flexiblethan the same instrumentwith 4% conicity).• The cutting effort (and thereforethe working torque) increasesin proportion to the increasein conicity.• The NiTi alloy is very well toleratedby the human body.The nickel and titanium atomsare very solidly joined togetherby covalent links whichimpede the nickel from passinginto the organism. In comparison,stainless steel has agreater quantity of free nickelatoms than the NiTi alloys.• The smaller the courvature rayonof the canal, the greater theincrease in metal fatigue.• The instrument's rotation speeddoes not have any influenceon the metal fatigue, but doesinfluence the rupture limit (thisis reached 2 x faster at a rotationspeed of 1000 rpm thanat 500 rpm).What method to use?"Crown-down"? … "Step-back"?… or another?Most continuous rotation endodonticsystems currently availableon the market are onlyadapted to the "crown-down"technique (this is in order toreduce the risk of screwingon/blocking/rupture).On the contrary, the intrinsicqualities of the FKG RaCe instruments (previously describedin this brochure) leave the practitionerentirely free to choosethe technique to use for eachtreatment, in function with themorphology of each canal andthe desired working comfort.With this in mind, FKG has puta complete set of RaCe instrumentsat the practitioner’s disposal(generally 3 to 5 instrumentssuffice for the treatmentof a canal).(Under study)