The effect of two different calcium hydroxide combinations on root dentine microhardness

  1. O. Yoldaş1,
  2. C. Doǧan2,
  3. G. Seydaoǧlu3

Article first published online: 18 NOV 2004

DOI: 10.1111/j.1365-2591.2004.00885.x

Issue

International Endodontic Journal

International Endodontic Journal

Volume 37, Issue 12, pages 828–831, December 2004

Additional Information

How to Cite

Yoldaş, O., Doǧan, C. and Seydaoǧlu, G. (2004), The effect of two different calcium hydroxide combinations on root dentine microhardness. International Endodontic Journal, 37: 828–831. doi: 10.1111/j.1365-2591.2004.00885.x

Author Information

  1. 1

    Department of Conservative Dentistry and Endodontics

  2. 2

    Department of Pediatric Dentistry, Faculty of Dentistry

  3. 3

    Department of Biostatistics, Faculty of Medicine, University of Cukurova, Adana, Turkey

*Oǧuz Yoldaş, Çukurova Universitesi, Diş Hekimliǧi Fakültesi, 01330 Balcal Adana, Turkey (Tel.: +90 322 3386354; fax: +90 322 3387331 e-mail: oguzyoldas@cu.edu.tr).

Publication History

  1. Issue published online: 18 NOV 2004
  2. Article first published online: 18 NOV 2004
  3. Received 7 April 2003; accepted 19 August 2004

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Keywords:

  • calcium hydroxide;
  • dentine;
  • glycerine;
  • Knoop;
  • microhardness

Abstract

Aim  To evaluate the effect of a calcium hydroxide and glycerine mix and a calcium hydroxide and water mix on the microhardness of human root dentine.

Methodology  Eleven freshly extracted maxillary canine and central incisor teeth were used. The teeth were sectioned transversally to produce a total of 22 dentine discs from the middle-third of the root. The specimens were divided into two groups of 11 discs each. Dentine samples were treated with either a Ca(OH)2–glycerine combination or a Ca(OH)2–distilled water combination for 1, 3 and 7 days. Dentine microhardness was measured with a Knoop indenter with a load of 100 g for 15 s before and during the experimental period. Each root disc received a series of three indentations around the pulp space, 1 mm from canal wall.

Results  Statistical analysis showed that both combinations significantly decreased dentine microhardness after 3 and 7 days (P < 0.01). The reduction in dentine microhardness following the use of a Ca(OH)2–glycerine combination was significantly greater than that after a Ca(OH)2–distilled water combination after 3 and 7 days (P < 0.01).

Conclusion  The use of Ca(OH)2 combinations for intracanal dressing softens dentine.

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