HDM Gold Flexi Files NiTi Rotary System (Heat activation) 21mm

HDM NiTi Rotary System (Heat Activation)

Premium Endodontic Solutions by Meddent Dental Supplies

The HDM NiTi Rotary System is engineered for high-precision root canal treatments. Featuring advanced Heat Activation technology, these files provide clinicians with the perfect balance of flexibility and strength. Both the Super Taper and Gold Flexi series are now available in three distinct lengths to ensure you have the right tool for every clinical scenario

HDM Gold Flexi Files

Gold Flexi Files are designed for maximum flexibility, making them the preferred choice for narrow or severely curved canals. They feature a constant taper and "controlled memory," allowing them to be pre-bent to follow the natural anatomy of the tooth.

Available Lengths

All Gold Flexi sizes are available in 21mm, 25mm, and 31mm lengths.

Size & Refill Options

• 17/04: 250 RPM, 1.5 N.cm torque.
• 20/04: 250 RPM, 1.5 N.cm torque.
• 25/04: 250 RPM, 1.5 N.cm torque.
• 30/04 (New Refill Size): 250 RPM, 1.5 N.cm torque.
• 20/06: 250 RPM, 1.5 N.cm torque.
• 25/06: 250 RPM, 2.0 N.cm torque.

30/06 (New Refill Size): 250 RPM, 2.0 N.cm torque

Clinical Advantages

• Heat-Activated NiTi: Enhances flexibility and prevents the file from "rebounding" in curved canals.
• Non-Cutting Safety Tip: Ensures the file stays centered in the canal, preventing ledging and apical transportation.
• Comprehensive Length Selection: With 21mm, 25mm, and 31mm options, you can treat everything from short molars to exceptionally long canines with ease.
• High Cyclic Fatigue Resistance: Significantly reduces the risk of instrument separation within the canal.

Safety & Maintenance Tips

• Visual Inspection: Always inspect the file flutes before and after use. If you notice any unwinding or deformation, discard the file immediately.
• Single-Patient Use Recommended: While autoclavable, single-use is recommended to prevent cross-contamination and minimize the risk of cyclic fatigue failure.
• Never Force the File: If you meet resistance, withdraw the file, irrigate, and go back to a smaller manual K-file to clear the path.
• Length Selection: * Use 21mm for molars to improve access and visibility.

• Use 25mm for standard cases.

Use 31mm specifically for long canines or anterior teeth to ensure the motor head does not obstruct your view.

Autoclaving Instructions

1. Pre-clean the instruments using a disinfectant solution or ultrasonic cleaner.
2. Rinse thoroughly with distilled water and dry.
3. Place in sterilization pouches.

Autoclave at 134°C for 5–10 minutes (follow your specific autoclave manufacturer's settings for "wrapped instruments").

Clinical Protocol: HDM Gold Flexi Files

Best for: Severely curved, narrow, or calcified canals where maintaining canal centering is critical.

Step 1: Scout & Glide Path

• Explore the canal and establish WL with a #10 K-File.
• Ensure a "super glide path" is established (the #15 K-file should feel very loose at the apex).

Step 2: Orifice Opening

• Use the SX (from the Super Taper set) or the 25/09 Flexi file at 300 RPM to flare the coronal entry.

Step 3: Progressive Shaping (Constant Taper)

Use the files in a sequential manner to full Working Length. Because these have a constant taper, they are safer in curved roots.

• 17/04 (White): First rotary file to reach full WL.
• 20/04 (Yellow): Follow to full WL.
• 25/04 (Red): Follow to full WL. This is the minimum recommended apical size for most canals.

Step 4: Final Apical Finishing

Based on the width of the canal, choose your final apical size:

• For Narrow/Curved Canals: Stop at 25/04 or 25/06.
• For Medium Canals: Use the 30/04 or 30/06 refills to ensure adequate cleaning of the apical third.
• Motion: Use a gentle "in-and-out" pecking motion. Do not stay at the apex for more than 1-2 seconds.

Clinical Protocol: HDM Gold Flexi Files

The Constant Taper System – Best for severely curved, narrow, or calcified canals where maintaining the original canal center is critical.

Phase A: Glide Path and Preparation

1. Initial Scout: Establish working length (WL) with a #10 K-File.
2. Glide Path: Ensure the canal is patent. Use a #15 K-file to create a "Super Glide Path" where the file moves freely to the apex.
3. Coronal Access: Use the 25/09 (Flexi) or the SX (Super Taper) to flare the coronal third for easier entry.

Phase B: Sequential Shaping

Because these files have a constant taper, they are safer in curvatures as they exert less stress on the root walls.

1. 17/04 (White): This is your first shaping file. Advance to full WL at 250 RPM / 1.5 N.cm.
2. 20/04 (Yellow): Follow the 17/04 to the full WL.
3. 25/04 (Red): Advance to the full WL. In most narrow canals, this provides the ideal apical preparation size.

Phase C: Final Apical Sizing (Refill Options)

Depending on the specific tooth, you may choose to finish with larger sizes:

• Narrow/Curved Canals: Stop at 25/04 or 25/06.
• Standard Canals: Use the 30/04 or 30/06 refills to achieve a broader apical clean, especially in maxillary anteriors or wider premolars.
• Motion: Use a light, rhythmic "in-and-out" motion. Never let the file sit at the apex for more than 1 second.

Key Maintenance Differences

• Super Taper Gold: These are more "aggressive" cutters. They work best with a Brushing Motion on the outstroke to widen the canal.
• Gold Flexi: These are designed for Extreme Flexibility. They should be used with a Pecking Motion, allowing the heat-activated NiTi to gently navigate curves without pre-stressing the metal.