M3 RT Retreatment Files – Bondent UDG

M3 RT Retreatment Files for Root Canal Retreatment

M3 RT Retreatment Files are Bondent UDG rotary endodontic instruments designed to remove root canal filling materials before reshaping the canal. The system provides a progressive sequence for removing materials such as gutta-percha, sealers, paste fillers and carrier-based obturators.

Instead of using one instrument for the entire canal, the system uses different file sizes for different sections. Therefore, clinicians can approach coronal, middle and apical filling material progressively.

The system uses continuous rotation and an efficient cutting tip. As a result, it provides a dedicated solution for mechanical filling-material removal during nonsurgical endodontic retreatment.

Why Choose M3 RT?

Retreatment often begins with the removal of existing filling material. Therefore, clinicians need instruments that can engage and remove the material efficiently while maintaining control of the canal.

M3 RT Retreatment Files use a three-file sequence for this purpose. First, the larger D1 file addresses the coronal portion. Next, D2 works through the middle section. Finally, D3 reaches the deeper apical portion.

This progressive approach helps organise the retreatment procedure and prepares the canal for subsequent reshaping.

Key Benefits

• Designed for retreatment: Developed specifically for mechanical removal of existing root filling materials.
• Progressive three-file sequence: D1, D2 and D3 address different sections of the filled canal.
• Efficient cutting tip: The active cutting design helps engage filling materials during removal.
• Continuous rotation: The system uses continuous rotary motion during the removal procedure.
• Multiple file dimensions: The three instruments use different tip sizes and tapers for progressive filling-material removal.
• Controlled workflow: The sequence provides a structured approach before subsequent canal reshaping.
• Professional endodontic application: Suitable for dental practices performing nonsurgical root canal retreatment.

Removing Root Canal Filling Materials

During retreatment, the clinician first needs to gain access through the existing restoration and locate the canal orifices.

Next, the clinician can use the appropriate retreatment instrument to engage the existing filling material. As the instrument advances, it can remove material progressively from the canal.

The M3 RT sequence addresses different canal sections with different instrument dimensions. Therefore, the clinician can progress from the coronal portion toward the apical region rather than relying on a single instrument.

After removing the filling material, the clinician can proceed with irrigation, working-length confirmation and canal reshaping.

Three-File Retreatment Sequence

The system uses three principal instruments:

File	Size	Taper	Length	Primary Application
D1	30	9%	16 mm	Coronal filling removal
D2	25	8%	18 mm	Middle-root filling removal
D3	20	7%	22 mm	Apical filling removal

The progressive sequence moves from a larger coronal instrument to smaller instruments for deeper canal sections.

Consequently, the clinician can remove filling material in stages while maintaining a structured approach to retreatment.

D1 – Coronal Filling Removal

The D1 file uses a size 30 tip with a 9% taper and a 16 mm length.

First, clinicians use this instrument to address the coronal portion of the existing filling material. Its larger diameter and shorter working length make it suitable for the initial stage of mechanical filling removal.

Furthermore, the active cutting tip helps the instrument engage the filling material.

After removing the coronal material, the clinician can progress to the next instrument.

D2 – Middle-Root Filling Removal

The D2 file uses a size 25 tip with an 8% taper and an 18 mm length.

Next, D2 addresses the middle section of the filled canal. The smaller tip size allows the clinician to progress deeper after the coronal portion has been cleared.

Therefore, D2 forms the intermediate stage of the retreatment sequence.

D3 – Apical Filling Removal

The D3 file uses a size 20 tip with a 7% taper and a 22 mm length.

Finally, D3 addresses filling material in the deeper apical portion of the canal. Its smaller tip and longer working length allow the sequence to progress toward the apical region.

The clinician should always assess canal anatomy and resistance before advancing the instrument.

M3 RT Operating Parameters

Available product information specifies the following operating parameters:

File	Recommended Speed	Torque
D1 – 30/09	350–500 rpm	2 N·cm
D2 – 25/08	350–500 rpm	2 N·cm
D3 – 20/07	350–500 rpm	2 N·cm

Use the current manufacturer's instructions for the exact product supplied. In addition, always consider the motor, canal anatomy and clinical technique before selecting operating parameters.

Do not apply one generic setting to unrelated endodontic files.

M3 RT Retreatment Workflow

The system can fit into a structured nonsurgical retreatment workflow.

Step 1 – Assess the Existing Treatment

First, evaluate the existing root canal treatment and determine whether nonsurgical retreatment is appropriate.

Step 2 – Gain Access

Next, remove the existing restoration or restorative material as clinically required and gain access to the canal system.

Step 3 – Locate the Canal Orifices

Then, identify the treated canals and establish a suitable pathway for instrument entry.

Step 4 – Start With the Coronal Portion

Use the D1 instrument to address the coronal filling material.

Work carefully and allow the instrument to engage the filling material without forcing it apically.

Step 5 – Progress to the Middle Section

Once the coronal portion has been cleared, progress to D2.

This instrument addresses the middle-root filling material and allows the retreatment sequence to move deeper into the canal.

Step 6 – Address the Apical Section

Next, use D3 to address the deeper filling material.

Proceed carefully and maintain control as the instrument approaches the apical region.

Step 7 – Irrigate

Irrigate frequently throughout the procedure. This helps remove loosened material and supports canal cleanliness.

Step 8 – Confirm Working Length

Once the existing filling material has been removed sufficiently, determine the working length using an appropriate apex locator and radiographic assessment where indicated.

Step 9 – Reshape the Canal

Finally, use the selected shaping system to prepare the canal for the next stage of treatment.

Always follow the manufacturer's instructions and the clinician's established retreatment protocol.

Removing Different Filling Materials

The system is intended for the removal of existing root canal filling materials.

These can include:

• Gutta-percha
• Sealer-associated filling material
• Paste fillers
• Carrier-based obturators
• Other suitable root filling materials

However, filling materials can differ significantly in composition and resistance.

Therefore, clinicians should adapt the retreatment technique to the material encountered, canal anatomy and clinical situation.

Efficient Mechanical Retreatment

A dedicated retreatment system can make the mechanical removal stage more organised.

First, D1 addresses the coronal material. Then, D2 progresses into the middle section. Finally, D3 addresses the deeper apical material.

As a result, the three-file sequence provides a straightforward progression from coronal access toward the apical region.

Nevertheless, mechanical files should complement careful clinical assessment. Irrigation, manual instrumentation and appropriate working-length control remain important throughout retreatment.

Technical Specifications

Specification	Details
Product	M3 RT Retreatment Files
Brand	UDG
Manufacturer	Bondent
Product type	Rotary retreatment files
Primary application	Root filling-material removal
File sequence	D1 → D2 → D3
D1	30/09, 16 mm
D2	25/08, 18 mm
D3	20/07, 22 mm
Operating speed	350–500 rpm
Torque	2 N·cm
Movement	Continuous rotation
Certification	Class IIa, CE, ISO
Pack configuration	6 files for assorted configuration

Bondent's catalogue identifies M3 RT as a retreatment system for removing gutta-percha by stepwise sections and specifies continuous rotation. Current product information also identifies D1, D2 and D3 as the principal instruments.

Available Lengths and Configurations

The M3 RT range appears in different configurations depending on the selected file.

Current product listings identify:

• D1 / 30/09: 16 mm
• D2 / 25/08: 18 mm
• D3 / 20/07: 22 mm or 25 mm depending on the product reference

Individual and assorted configurations can therefore vary.

For example, an assorted pack can contain the three principal file sizes. Confirm the exact reference and length before ordering.

Who Should Consider M3 RT?

These retreatment files can suit:

• General dental practitioners
• Endodontic clinicians
• Private dental clinics
• Multi-chair practices
• Clinics performing nonsurgical retreatment
• Practices that routinely remove gutta-percha
• Dentists who need a dedicated filling-material removal system

Furthermore, the system can complement other Bondent endodontic products used for glide path creation, canal shaping and working-length determination.

What to Consider Before Buying

Before ordering, first confirm the filling materials commonly encountered in your practice.

Next, check the required file lengths and configuration. Different product references can provide different D3 lengths, so verify the exact specification before purchase.

Also, consider the endodontic motor you will use with the files. The motor should allow appropriate speed and torque control.

Finally, ensure that clinicians using the system understand the retreatment sequence and current manufacturer's instructions.

Frequently Asked Questions

What are M3 RT Retreatment Files?

M3 RT Retreatment Files are Bondent UDG rotary instruments designed to remove existing root canal filling materials before canal reshaping.

What materials can the files remove?

The system is designed for removal of materials such as gutta-percha, paste fillers, sealers and carrier-based obturators.

How many files are in the main sequence?

The sequence uses three principal instruments: D1, D2 and D3.

What is the D1 file used for?

D1 uses a 30/09 configuration and addresses the coronal portion of the filling material.

What is the D2 file used for?

D2 uses a 25/08 configuration and addresses the middle-root portion.

What is the D3 file used for?

D3 uses a 20/07 configuration and addresses deeper apical filling material.

What speed should I use?

Available product information specifies 350–500 rpm for the three files.

What torque should I use?

Available product information specifies 2 N·cm. Always confirm the current manufacturer's instructions for the exact product supplied.

Do the files use continuous rotation?

Yes. Bondent identifies M3 RT as a continuous-rotation retreatment system.

Are M3 RT files suitable for every retreatment case?

No file system suits every clinical situation. Canal anatomy, filling material, previous treatment quality and instrument condition all influence the retreatment technique.

What should I use after removing the filling material?

After adequate filling-material removal, clinicians can determine working length, irrigate and proceed with an appropriate canal-shaping system.

Complete Your Retreatment Workflow

For a complete endodontic retreatment setup, consider pairing the files with:

• iRoot Apex
• Endo Wise
• Endo Wise Plus
• M3 Safe Path Files
• M3 Path
• M3 Pro Gold
• Endodontic irrigation needles
• Irrigation solutions
• Gutta-percha points
• Endodontic sealers
• Endodontic microscopes
• CBCT dental imaging

A practical retreatment workflow can therefore progress through:

Assessment → Access → Filling-material removal → Working-length determination → Glide path → Canal reshaping → Irrigation → Obturation

For example, iRoot Apex can support working-length determination after the existing filling material has been removed. Similarly, M3 Safe Path Files can help establish a mechanical glide path before subsequent shaping.

Why Buy From TransAfrica Medical Supplies?

TransAfrica Medical Supplies supplies professional dental equipment, endodontic instruments and consumables to dental clinics across Kenya.

Our team can help you select the appropriate retreatment files, motor and supporting instruments for your clinical workflow.

Furthermore, we can help you build a complete retreatment setup around M3 RT, including apex locators, endodontic motors, glide path files, shaping systems, irrigation products and obturation materials.

Order M3 RT Retreatment Files in Kenya

Choose M3 RT Retreatment Files from Bondent UDG for a structured approach to mechanical root filling-material removal.

The three-file D1–D3 sequence progresses from the coronal portion toward the apical region. In addition, continuous rotation and dedicated file dimensions help clinicians organise the mechanical retreatment stage.

Contact TransAfrica Medical Supplies for pricing, availability and professional product support in Kenya.