TruNatomy® Orifice Modifier, 16mm (6)

TruNatomy® · Orifice Modifier · 16 mm

Coronal accessNo straight-line accessPreserving peri-cervical dentine

Shape the orifice first, without cutting a straight-line access through the tooth

Straight-line access costs dentine at the neck of the tooth, and that is the part TruNatomy® is designed to keep. The Orifice Modifier is the first rotary file in Dentsply Sirona’s sequence: it shapes the orifice to create the entry point for the Glider and shaping files, and works only in the coronal third. The Orifice Modifier comes in one length, 16 mm.

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® Orifice Modifier, 16 mm (Pack of 6)
Dentsply Sirona · made by Maillefer Instruments Holding Sàrl, Ballaigues, Switzerland

What this file does

›  Entry point, not a straight-line cavity. Dentsply Sirona: “TruNatomy® Orifice Modifier shapes the orifice to create the entry point without straight line access.” Their data on file.
›  Coronal third only. Step 5 of the Solution Guide: “The instrument has 7 mm of cutting flutes, insertion into the canal should not exceed the length of the cutting portion.”
›  One length. Dentsply Sirona list it at 16 mm only – its job never takes it deeper than its flutes.

Where it sits in Dentsply Sirona’s sequence

1  Scout the coronal two-thirds. An ISO 010 K-file with a lubricant such as Glyde™ File Prep, then irrigate (step 4).

2  Orifice Modifier. With irrigant in the canal, 2–3 gentle amplitudes of about 2–5 mm, repeated until the coronal third is shaped. Irrigate and clean the flutes (step 5).

3  Then the whole canal. Scout to length with the ISO 010 K-file, working length by apex locator and radiograph, confirm patency (step 6) – then the Glider.

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

Do I still need to prepare an access cavity?
Yes. Step 3: “Prepare a conservative access cavity sufficient enough to reveal all root canal orifices.” The Orifice Modifier works from there.

Why is there no 21, 25 or 31 mm version?
Because it never goes past its 7 mm of flutes. Dentsply Sirona list it at 16 mm only.

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® Orifice Modifier 20.08, 16 mm (6) · heat-treated NiTi rotary · 500 rpm · 1.5 Ncm · Dentsply Sirona · REF BSTTNMY616OMD