HyFlex EDM OGSF Shaping 18/.045, 25mm (3)

HyFlex EDM · Shaping File 18/.045 · 25 mm

Shaping to lengthOne shaping fileOGSF step 3

Shaping File 18/.045 – the one shaping file in the OGSF sequence

Coltene built the OGSF sequence so that one file does the shaping. After the Opener and the 15/.03 Glidepath File, the 18/.045 Shaping File enlarges the canal up to working length. The sizes were designed with Prof. Eugenio Pedullà, so each file hands on to the next smoothly.

Sizes as Coltene print them: tip diameter / taper. Motor settings from Coltene’s HyFlex EDM OGSF instructions for use (REV-03-2023).

This pack: Coltene HyFlex EDM OGSF Shaping File, ISO Size 18, .045 Taper, 25 mm (Pack of 3) · presterilised
Coltene · Coltène/Whaledent GmbH + Co. KG, Langenau, Germany

What this file does

›  One shaping file. Coltene: the sequence includes “a Shaping file for shaping the root canal over the full length.”
›  To working length. Step 3: “Use the Shaping File 18/.045 for enlargement of the root canal up to the working length.”
›  Step back at resistance. “Return to the previous step as soon as resistance is felt.” Then check patency with a hand file.

Where it sits in the sequence

1  Coronal access. Straight-line access, then a hand file (Coltene say up to 20/.02) or a rotary glide path file, with irrigant such as NaOCl in the canal. Orifice Opener 18/.11 creates space coronally.

2  Glide path. Glidepath File 15/.03 to working length, at 300 rpm.

3  Shape. Shaping File 18/.045 to working length.

4  Finish. Finishing File 30/.04 to working length; larger finishers if needed.

Summarised from Coltene’s HyFlex EDM OGSF instructions for use (REV-03-2023). Your clinical judgement governs the case; the instructions for use govern the file.

How every HyFlex EDM file is used

Coltene give one handling rule for every file in the range: “Place the file in the canal without running engine. When the file cannot proceed any further move it back 1mm until it is free of the walls. Then start the engine and proceed forward slowly using tapping movements and without applying pressure.” Irrigate the canal frequently, keep it lubricated, and clean the spirals every time the file comes out.

Questions we get asked

Why an 18 tip after a 15 glide path?
Coltene’s reasoning is the step between files: “Due to the optimized match of tip sizes and tapers, designed in cooperation with Prof. Pedullà, the files provide a smooth feeling when shifting from one file to another and help you to keep control over the treatment.”

Which motor settings?
Coltene set 400 rpm and up to 2.5 Ncm for the HyFlex EDM files (the 2025 instructions allow 400–500 rpm on the classic files), and 300 rpm and up to 1.8 Ncm for the glide path files, in continuous rotation on a low-speed contra-angle. Set it in a custom programme on any of the three endo motors we stock: X-Smart® Go · X-Smart® Pro+ · VDW.SILVER® RECIPROC®.

Can I pre-bend them?
Coltene say so: “Like stainless steel files, the HyFlex EDM files can be pre-bent.” They put it down to the Controlled Memory heat treatment of the nickel-titanium.

Anything to check before use?
Coltene’s instructions carry one patient caution: HyFlex EDM files “contain Nickel and Titanium and should not be used on patient with known allergic sensitivity to these metals.” And before each use, a manual check that the file is correctly fixed in the contra-angle.

Complete the case

HyFlex EDM Shaping File 18/.045, 25 mm (3) · heat-treated NiTi, electric discharge machined · 400 rpm · up to 2.5 Ncm · presterilised · Coltene · REF 60036137