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Hard-tissue resorption and deposition after endodontic instrumentation
Oral Surgery, Oral Medicine, and Oral Pathology
|June 1, 1980
Summary
Endodontic instrumentation stimulates hard tissue resorption in monkey teeth. While resorption decreased after 42 days, tissues did not fully recover, with infection potentially enhancing further resorption.
Area of Science:
- Endodontics
- Histology
- Periodontology
Background:
- Endodontic procedures can lead to hard tissue changes.
- Understanding the timeline and extent of these changes is crucial for clinical practice.
Purpose of the Study:
- To histologically evaluate hard-tissue resorption and deposition after endodontic instrumentation.
- To assess changes at the root canal wall, root surface, and lamina dura over time.
Main Methods:
- Forty-one monkey teeth underwent histological examination.
- Resorption sites (lacunae) were quantified and measured at 2, 7, and 42 days post-instrumentation.
- No medicaments or root canal filling materials were used.
Main Results:
- Instrumentation-induced resorption was evident by day 7 at all sites.
- Resorption was mild at the root canal wall and root surface but severe at the lamina dura.
- By day 42, resorption subsided but tissues remained abnormal; infection appeared to enhance resorption.
Conclusions:
- Endodontic instrumentation initiates a resorption process in surrounding hard tissues.
- The lamina dura is particularly susceptible to severe resorption.
- Complete tissue normalization was not observed within 42 days, and infection may exacerbate resorption.