Woodpecker / Terauchi Endo File Removal / TFRK-L

The Loop in the TFRK (Terauchi File Removal Kit) is a specialized micro-lasso tool used for retrieving broken files from root canals during endodontic procedures. Here's a detailed breakdown based on the provided information:

TFRK Loop:

• The Loop is part of the TFRK designed to extract a broken file segment after it has been loosened using ultrasonic tips.
• It is particularly effective when:
  • The broken file is longer than 4.5 mm.
  • The ultrasonic attempts to remove the file (within 10 seconds) have been unsuccessful.

Components and Specifications:

• Loop Sizes: Two wire diameters are available:
  • 0.12 mm: Suitable for larger root canal diameters.
  • 0.08 mm: Suitable for narrower root canals.
• Microtube:
  • Diameter: 0.5 mm.
  • Length: 23 mm.
  • Pre-curvable to facilitate placement into the root canal.

Adjustability and Replacement:

• The Loop size is adjusted using an endodontic explorer:
  • Smaller size: Formed near the explorer's tip.
  • Medium size: Adjusted at the explorer's middle portion.
  • Larger size: Adjusted at the shank end.
• The loop is bent to a 45-degree angle to allow easy placement over the broken file.
• The Loop cannula is replaceable, allowing for quick replacement in case of damage.

Preparation and Usage:

1. Before Use:
   • Ensure the broken file is loosened with ultrasonic tips to prevent Loop damage.
   • Use an endodontic explorer (e.g., DG-16) to size and shape the Loop.
2. Placement:
   • Insert the Loop into the canal with the cannula positioned on the curvature's inside and the Loop extending to the curvature's outside.
   • Tighten the Loop around the exposed portion of the broken file by gently sliding the plastic button.
3. File Extraction:
   • Pull the Loop gently while maintaining tension to extract the file.
   • If resistance is felt, try pulling at different angles (12, 3, 6, and 9 o’clock) to find the optimal direction for removal.
   • Repeat the process if the Loop slips off the file.

Maintenance and Precautions:

• Always loosen the file with ultrasonic tips before using the Loop.
• Handle the plastic button gently to avoid kinking or breaking the Loop wire.
• Avoid using pliers or excessive force on the Loop or its components.
• Replace the Loop if it is damaged or weakened.

Clinical Significance:

The Loop is a delicate yet highly effective tool for removing separated file fragments from root canals, ensuring that the instrument is properly loosened and secured during extraction.

Here are some videos for your viewing. Enjoy!

TFRK Loop Introduction

Removing a 4.5mm Broken File With TFRK-L

TFRK-L Loop Replacement Demonstration