Triniti® 20/.04, 21mm (6)

Triniti® 20/.04 · 21 mm · 6 files

Crown-downLimited accessPosterior teethShort canalsSterile, single use

A 21 mm file, for when the mouth will not open any further

The same conservative 20/.04 geometry in a 21 mm length – four millimetres less handpiece to fit between the tooth and the opposing arch. VDW set it at 30 gcm – 0.30 Ncm.

This pack: Triniti® Rotary NiTi File, ISO 20 tip, .04 taper, 21 mm, 16 mm working part (Pack of 6) · sterile, single use
REF V201342021020 · Made by Maillefer Instruments Holding Sàrl, Ballaigues, Switzerland

Key features

›  ISO 20 tip on a constant .04 taper – 0.20 mm across the tip, gaining 0.04 mm in diameter for every millimetre back from it, which is the same figure written as 4%

›  16 mm working part on a 21 mm shank, with the yellow ISO 20 band on the handle

›  Three cutting edges on a convex triangular section – VDW describe the geometry as the efficiency of traditional K-type cutting blades, i.e. a convex cross-section to stabilise the instrument core and a cutting blade angle suitable for rotary use

›  Cut to clear debris – VDW credit the special K-type cutting edges with efficient removal of debris and dentine chips

›  Continuous rotation at approximately 300 rpm, with the torque set to the figure for the size – 30 gcm for this one

›  Supplied sterile and single use – ready to use, with no sterilisation before the case and nothing to re-process after it

Why this size?

Length is an access decision before it is a clinical one. A second molar in a patient who cannot open wide does not care how good a 25 mm file is if the contra-angle will not seat straight on the orifice, and a file entered at an angle is a file being asked to bend at the hub. The 21 mm version is the same instrument, the same 16 mm working part and the same torque figure – just shorter behind the flutes.

How VDW set the system out

The goal of root canal preparation is to create optimal conditions for a tightly sealed and long-lasting root filling, which includes a uniformly tapered canal shape.

VDW, on the Triniti® range

It is a crown-down system, and the tapers are the sequence rather than a specification. VDW's smaller tapers are the ones they describe as being used for better apical shaping and for preserving the original canal axis – the centre line – which is the job this file is in the range to do. The larger tapers have already taken the bulk out of the straight part of the canal by the time it goes in.

Where the name comes from

Triniti® came to the UK market in the early 2000s with one job: to get general practice to try NiTi – to move from stainless steel hand files to rotary nickel-titanium for the first time. The name carries that invitation and two further readings with it. The section is a convex triangle, so the blade cuts on three edges. And the instrument is nickel-titanium. Try NiTi, tri, NiTi – three readings, one name, and it has outlived the campaign that coined it.

Motor settings

Any torque-limited endodontic motor that can be set to a rotation speed and a torque ceiling will run it. We stock the X-Smart® Pro+ and the VDW.SILVER® RECIPROC, both with a 6:1 contra-angle.

Specification

Questions we get asked

What torque and speed should I set?
VDW's figure for this file is 30 gcm, which is 0.30 Ncm, at a constant rotation of about 300 rpm. The torque is per file, not per range – every size in the range has its own number.

Are they sterile, and can I re-use them?
They are supplied sterile and are single use in the UK. Nothing to autoclave before the case and nothing to re-process after it, so there is no count to keep and no wear to judge – a fresh file every time, which is the whole argument for buying a rotary instrument sterile.

Which cone and paper point fit it?
A constant-taper preparation wants a constant-taper cone of the same size. Pro-Fit® gutta percha 20/.04 and Pro-Fit® paper points 20/.04 match this file exactly on both tip size and taper.

How does it compare with its neighbours?
The range runs two tapers so that tip size and taper can be chosen separately. The nearest alternatives to this file are 25/.04.

Complete the case

Resin or bioceramic is a real choice of technique rather than a ranking – we carry both because both are right in different hands. Irrigation is the half of the case a file does not do: a crown-down sequence shortens the mechanical part, not the chemical one.

Triniti® 20/.04 · 21 mm · 16 mm working part · nickel-titanium, continuous rotation · 0.30 Ncm at ~300 rpm · sterile, single use · blister of 6 · made by Maillefer, Ballaigues · REF V201342021020