Effect of calcium hydroxide paste dressing on uninstrumented root canal wall

Journal of Endodontics
H WakabayashiK Matsumoto

Abstract

Dissolution of soft tissues on the uninstrumented root canal wall by an intracanal dressing of calcium hydroxide paste was examined by scanning electron microscopy (SEM). The roots of human extracted teeth were split longitudinally into halves, and the pulp tissue was removed by forceps. Then, the halves were divided randomly into three groups. Specimens in the control group were given no treatment. Specimens of the 1-wk group were stored for 7 days in calcium hydroxide-saline paste under the condition of 100% humidity and 37 degrees C. Specimens of the 4-wk group were stored for 28 days in the same manner, but washed and replaced into new paste every week. Root canal walls of these specimens were compared under a scanning electron microscope. A layer of odontoblasts was observed in the control group, whereas it had disappeared completely in the 1- and 4-wk groups. However, the predentin remained almost intact in the 1-wk group, and although the surface was eroded, in the 4-wk group. It was found that calcium hydroxide paste dressing could dissolve the odontoblastic cell layer, but had little effect on predentin.

References

Jun 1, 1992·Endodontics & Dental Traumatology·M AndersenF M Andreasen
Mar 1, 1992·International Endodontic Journal·B S Chong, T R Pitt Ford
May 1, 1991·International Endodontic Journal·U SjögrenG Sundqvist
Jul 11, 1991·Oral Surgery, Oral Medicine, and Oral Pathology·K G StuartC W Newton
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Citations

May 4, 2011·International Endodontic Journal·Z Mohammadi, P M H Dummer
Sep 5, 2014·International Endodontic Journal·M Z ScelzaG De Deus
Sep 15, 2001·International Endodontic Journal·F PérezJ F Péli
Aug 3, 2001·International Endodontic Journal·K GulabivalaY L Ng
Nov 7, 1999·International Endodontic Journal·L R Fava, W P Saunders
Oct 26, 2002·Journal of Endodontics·Magdalena Azabal-ArroyoJosé María Vega-del Barrio
Sep 2, 2005·Acta Odontologica Scandinavica·Till DammaschkeKlaus Heinrich Reiner Ott
Dec 23, 2004·Journal of Endodontics·Stephen J CwiklaFrank J Vertucci

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