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Effect of intracoronal bleaching on external cervical root resorption
1University of Medicine and Dentistry of New Jersey, New Jersey Dental School, Newark.
Journal of Endodontics
|April 1, 1992
Summary
Bleaching endodontically treated dog teeth with sodium perborate and superoxol caused external cervical root resorption after 3 months. No resorption was seen at 1 month, indicating a delayed effect of the bleaching agent on root structure.
Area of Science:
- Dental research
- Endodontics
- Histopathology
Background:
- Endodontic treatment can lead to tooth discoloration.
- Intracoronal bleaching is a common method to address this.
- Potential side effects of bleaching agents on root structures require investigation.
Purpose of the Study:
- To histologically and radiographically assess the effects of a specific bleaching agent on the cervical root and periodontal tissues.
- To evaluate the impact of the walking bleach technique on endodontically treated teeth in a canine model.
Main Methods:
- Endodontic treatment was performed on canine anterior teeth.
- Teeth were divided into bleached and non-bleached groups.
- Histological and radiographic examinations were conducted at 1 and 3 months post-bleaching.
Main Results:
- External cervical root resorption was observed exclusively in the bleached teeth.
- Resorption was evident at the 3-month follow-up but not at the 1-month mark.
- No adverse effects were noted in the non-bleached control group.
Conclusions:
- The bleaching agent (sodium perborate and superoxol) can induce external cervical root resorption in endodontically treated teeth.
- This resorption appears to be a time-dependent process, manifesting after 3 months.
- Clinicians should consider the potential risk of root resorption when using this bleaching technique.