TruNatomy® Prime 26/.04v, 31mm (6)

TruNatomy® · Prime · 31 mm

Every caseShapingPreserving dentineCurved canals

Prime at 31 mm, the first shaping file for long roots

“ALWAYS begin shaping with TruNatomy® PRIME.” That is step 8 of Dentsply Sirona’s procedure, in capitals. Prime is the file the whole system is built around: a 26.04v shaping file on a slim 0.8 mm heat-treated NiTi wire, designed to shape the canal while removing dentine only where it is needed. This is the 31 mm version, for long roots a 25 mm file will not take to working length.

Sizes as Dentsply Sirona print them. The “v” means variable taper; the taper shown is the average along the file, not the taper at the tip. Motor settings from the Solution Guide.

This pack: TruNatomy® Prime Rotary File, ISO Size 26, .04v Taper, 31 mm (Pack of 6)
Dentsply Sirona · made by Maillefer Instruments Holding Sàrl, Ballaigues, Switzerland

What this file does

›  First, every time. After the Orifice Modifier and Glider, Prime goes in passively in the presence of sodium hypochlorite, 2–3 gentle amplitudes of about 2–5 mm, until working length (step 8).
›  Stop at length. Step 8 again: “Upon reaching length, remove the file to avoid over-enlarging the apical canal portion.”
›  Where the shape goes next. Not progressing: the Small, then back to Prime. Loose at length with clean apical flutes: Medium, then Large if needed (steps 10 and 13).

Where it sits in Dentsply Sirona’s sequence

1  Orifice Modifier, then Glider. Coronal third shaped, working length confirmed, glide path made (steps 5–7).

2  Prime to working length. Passively, with sodium hypochlorite, 2–3 gentle amplitudes; irrigate, clean the flutes and repeat (steps 8–9).

3  Read the apical flutes. Loose at length with no dentinal debris: go to Medium. Otherwise confirm length by hand with Prime and try in the Prime cone (steps 13–14).

Quoted and summarised from the Dentsply Sirona TruNatomy® Solution Guide. Your clinical judgement governs the case; the instructions for use govern the file.

Questions we get asked

When do I go past Prime?
Dentsply Sirona’s procedure moves on only when Prime is loose at length with no dentinal debris in the apical flutes – then Medium, and Large in larger, straighter canals.

Which points and cone?
The Prime ones. Dentsply Sirona match both to the colour code and size of the last instrument used.

Which motor settings?
Dentsply Sirona give one setting for every TruNatomy® file: 500 rpm and 1.5 Ncm. Set it on any of the three endo motors we stock – X-Smart® Go · X-Smart® Pro+ · VDW.SILVER® RECIPROC®.

When do I throw a file away?
Dentsply Sirona’s procedure (step 11): inspect the cutting flutes routinely on removal for unwinding and straightening, and if deformation is noted, discard it and use a new TruNatomy® instrument.

Complete the case

TruNatomy® Prime 26.04v, 31 mm (6) · heat-treated NiTi rotary · 500 rpm · 1.5 Ncm · Dentsply Sirona · REF BSTTNMY631PRM