Root canal retreatment combined with broken file retrieval is one of the most technically demanding procedures in endodontics. In this advanced case, Dr. Othman H. Alani (M.Sc. Esthetic & Restorative Dentistry, Iraq) demonstrates a predictable and successful approach to managing a failed root canal treatment with two separated instruments in the mesial root of a lower right first molar.
Keywords: root canal retreatment, broken file retrieval, separated instruments, endodontic retreatment, ROGIN UltraMax, ROGIN retreatment kit, failed root canal treatment
Case Basic Information
- Clinician: Dr. Othman H. Alani, M.Sc. Esthetic & Restorative Dentistry
- Country: Iraq
- Tooth: Lower Right First Molar (#46 / Tooth 30)
- Diagnosis: Symptomatic apical periodontitis due to failed previous root canal treatment
- Case Difficulty: Advanced Case (Retreatment & File Retrieval)
- Main Challenges:
- Two broken instruments in the mesial root
- Poor quality of the original root canal filling
- Persistent dull pain and slight tenderness two years after initial treatment
The patient was referred with ongoing symptoms, and radiographic examination clearly showed inadequate obturation and two separated files lodged in the mesial canals.
Treatment Plan
The primary goal was to first retrieve the broken files from the mesiobuccal (MB) canal, followed by complete retreatment of all canals to achieve a thorough cleaning, shaping, and three-dimensional sealing.
Key decisions:
- Remove the old composite restoration to gain proper access
- Retrieve both separated instruments safely
- Completely remove the old gutta-percha
- Perform a new high-quality root canal treatment with excellent coronal seal
Clinical Workflow Step by Step
1️⃣ Access Cavity and Orifice Enlargement
After careful removal of the old composite restoration, the access cavity was refined. Orifice enlargement was performed using diamond-coated ultrasonic tips. This step provided straight-line access and better visibility while preserving as much pericervical dentin as possible.
2️⃣ Broken File Retrieval Using ROGIN UltraMax Ultrasonic Activator
The most critical phase was the retrieval of the two broken instruments in the mesial root.
Dr. Alani utilized the ROGIN UltraMax Ultrasonic Activator to safely loosen and retrieve both separated files one by one. The ultrasonic vibration effectively transmitted energy to dislodge the fragments without excessive dentin removal or risk of further complications. Both files were successfully removed, as documented in the intraoperative photographs.
3️⃣ Removal of Old Gutta-Percha
Once the broken files were retrieved, the ROGIN Retreatment Kit (D1, D2, and D3 files) was used to efficiently remove the old gutta-percha from all canals.
The sequential design of the ROGIN retreatment system allowed for controlled and rapid removal of the existing root filling material while maintaining the original canal anatomy.
4️⃣ Cleaning, Shaping, and Obturation
After complete removal of previous materials, the canals were thoroughly cleaned, shaped, and irrigated using state-of-the-art protocols. A new three-dimensional obturation was performed, achieving excellent adaptation and seal.
The final postoperative radiograph confirmed a well-obturated root canal system with proper coronal restoration.
One-Year Follow-Up
At the one-year recall, the patient was completely symptom-free with no signs of tenderness or pain. Radiographic evaluation showed healthy periapical tissues, confirming the long-term success of the retreatment.
This outcome highlights that even complex endodontic retreatment cases involving broken files can be managed predictably when proper techniques and high-quality instruments are used.
Clinical Tips from Dr. Othman H. Alani
✔️ Ultrasonic Activation Goes Beyond Irrigation
The ROGIN UltraMax Ultrasonic Activator is an outstanding tool not only for enhancing irrigation but also for safely loosening and retrieving separated instruments. Its controlled vibration makes file retrieval more predictable and less invasive.
✔️ Efficient and Safe Retreatment
The ROGIN Retreatment Kit (D1, D2, D3) offers a systematic and efficient solution for removing old gutta-percha. Its design allows clinicians to remove filling material quickly while minimizing the risk of altering the original canal anatomy.
✔️ Importance of Coronal Seal
Achieving a perfect coronal seal after retreatment is essential for long-term success and preventing reinfection.
Conclusion
This advanced endodontic retreatment case demonstrates that with meticulous planning, excellent access preparation, and the use of specialized instruments like the ROGIN UltraMax Activator and ROGIN Retreatment Kit, even challenging cases involving multiple broken files and failed root canal treatment can achieve predictable healing and long-term success.
Dr. Othman H. Alani’s approach showcases the importance of combining proper technique with modern endodontic tools to transform a failed treatment into a successful outcome.
Dr. Othman H. Alani
M.Sc. Esthetic & Restorative Dentistry
Iraq
