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pH changes in root dentin after root canal dressing with gutta-percha points containing calcium hydroxide
1Poliklinik für Zahnerhaltung, Münster, Germany.
Journal of Endodontics
|July 27, 2001
Summary
Aqueous calcium hydroxide suspension effectively alkalinized root dentin, reaching the root surface. Gutta-percha points containing calcium hydroxide did not demonstrate significant alkalinizing action on root dentin within seven days.
Area of Science:
- Endodontics
- Dental Materials Science
Background:
- Calcium hydroxide is a common intracanal medicament in endodontics.
- Effective alkalinization of root dentin is crucial for disinfection and healing.
Purpose of the Study:
- To compare the alkalinizing efficacy of calcium hydroxide in gutta-percha points versus aqueous suspension on root dentin.
Main Methods:
- 120 extracted teeth with enlarged root canals were treated with either calcium hydroxide-infused gutta-percha points or aqueous calcium hydroxide suspension.
- Treatments were applied for 24 hours, 3 days, and 7 days.
- Dentin pH was measured using a microelectrode at four points after longitudinal splitting.
Main Results:
- Gutta-percha points showed no significant alkalinizing effect on root dentin over 7 days.
- Aqueous calcium hydroxide suspension achieved rapid, prolonged, and extensive dentin alkalinization, extending to the root surface.
Conclusions:
- Aqueous calcium hydroxide suspension is superior to calcium hydroxide-infused gutta-percha points for achieving root dentin alkalinization.
- The delivery method significantly impacts the efficacy of calcium hydroxide as an intracanal medicament.
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