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Tissue formation in the root canal after total pulpectomy and partial root filling
Oral Surgery, Oral Medicine, and Oral Pathology
|August 1, 1978
Summary
Root canal fillings left short of the foramen heal with fibrous tissue. This study shows that even with a small gap, the periapical tissue successfully regenerates, indicating good healing potential for endodontic treatments.
Area of Science:
- Endodontics
- Dental Histology
- Regenerative Medicine
Background:
- Root canal therapy aims to eliminate infection and preserve tooth structure.
- The apical foramen is a critical area for periapical tissue healing.
- Understanding tissue response to root canal filling voids is essential for clinical success.
Purpose of the Study:
- To histologically evaluate the tissue response in the apical portion of root canals filled short of the foramen.
- To assess the healing process and tissue regeneration in the unfilled canal space over time.
Main Methods:
- Twenty human teeth underwent pulp extirpation and root canal filling with gutta-percha and Kloroperka N-ö, intentionally short of the foramen (2-4 mm).
- Teeth were extracted at 2, 6, and 10 months post-procedure.
- Histologic examination was performed to analyze the tissue response in the apical region.
Main Results:
- At 2 months, the space between the filling and foramen showed slightly inflamed connective tissue near the root filling.
- By 6 and 10 months, this space was filled with well-developed, cell-rich fibrous tissue.
- Minimal lymphocytic infiltration was observed adjacent to the root filling material at later time points.
Conclusions:
- Root canal fillings intentionally short of the foramen promote the formation of healthy, cell-rich fibrous tissue in the unfilled apical space.
- The periapical tissues demonstrate significant regenerative capacity, with minimal signs of chronic inflammation.
- This suggests that a small, controlled void at the apex may not compromise long-term endodontic success.