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Cervical canal leakage after internal bleaching.
J J Smith1, C J Cunningham, S Montgomery
1Department of Endodontics, USAF Medical Center, Lackland Air Force Base, TX.
Journal of Endodontics
|October 1, 1992
Summary
Using a Cavit base over gutta-percha significantly reduces leakage and dentinal penetration during internal walking bleach procedures. This protective barrier is recommended before bleaching to improve root canal treatment outcomes.
Area of Science:
- Endodontics
- Dental Materials Science
Background:
- Internal bleaching is a common procedure for discolored teeth.
- Potential leakage and dentinal penetration can compromise root canal treatment longevity.
Purpose of the Study:
- To evaluate the effectiveness of a Cavit base in preventing leakage and dentinal penetration during walking bleach procedures.
- To determine optimal placement of the Cavit base.
Main Methods:
- Forty teeth were divided into four groups based on sealer setting and Cavit base presence.
- Teeth underwent a two-week walking bleach protocol followed by methylene blue dye immersion.
- Dye penetration was assessed apically and through dentinal tubules.
Main Results:
- A 2-mm Cavit base significantly reduced linear leakage and dentinal penetration.
- Placement coronal to the cementoenamel junction is suggested.
- Cemental defects showed increased dye penetration.
Conclusions:
- A base material over gutta-percha is recommended before internal walking bleach.
- Cavit base effectively minimizes microleakage and dentinal penetration.
- Careful placement and consideration of root surface integrity are crucial.