Kurt W. Sturz

Abstract

Calcium hydroxide is a common intracanal medicament used in the treatment of immature teeth that have been subjected to trauma or decay prior to root canal therapy. The effect of calcium hydroxide on immature root dentin is important. One area of concern is the effect that calcium hydroxide has on the fracture resistance of an immature tooth. It is the aim of this study to compare the effect of four different commercially available calcium hydroxide pastes on the fracture resistance of bovine teeth. Seventy-five freshly extracted, intact bovine incisors were prepared according to a modified Haapasalo and Orstavik technique. Each specimen was randomly assigned to five different groups and the lumen was filled with one of the calcium hydroxide pastes under examination. The control group was treated with distilled water. The calcium hydroxide pastes studied in this project include Calasept, Pulpdent, Ultracal, and Diapex. After a sixty-day incubation period where the samples were kept in individual containers of distilled water at 37 degrees Celsius, the specimens from each group were tested for fracture resistance using an Instron machine. Measurements were taken in pounds of force (Ibf). Using the Kruskal-Wallis Ranks test at the significance level of ά = .05 there was a statistically significant difference among the five test groups with respect to mean fracture resistance with a p-value of 0.001. The Mann-Whitney u-test at the significance level of ά = .05 was used to establish relationships between any two test group pairs. There is no statistically significant difference between the mean fracture resistance of the control group and Diapex. There is no statistically significant difference between the mean fracture resistance of Calasept, Pulpdent, and Ultracal. The mean fracture resistance of the control group and Diapex is statistically significantly greater than that of Calasept, Pulpdent, and Ultracal. Calasept, Pulpdent, and Ultracal all reduced the fracture resistance of the bovine teeth; however, Diapex did not reduce the fracture resistance of the bovine teeth.

LLU Discipline

Pediatric Dentistry

Department

Pediatric Dentistry

School

Graduate Studies

First Advisor

John Peterson

Second Advisor

Leif K. Bakland

Third Advisor

James Kettering

Fourth Advisor

Jay Kim

Degree Name

Master of Science (MS)

Degree Level

M.S.

Year Degree Awarded

2006

Date (Title Page)

6-2006

Language

English

Library of Congress/MESH Subject Headings

Dentin; Dentin-Bonding Agents; Calcium Hydroxide; Tooth Fractures

Type

Thesis

Page Count

ix; 17

Digital Format

PDF

Digital Publisher

Loma Linda University Libraries

Usage Rights

This title appears here courtesy of the author, who has granted Loma Linda University a limited, non-exclusive right to make this publication available to the public. The author retains all other copyrights.

Collection

Loma Linda University Electronic Theses and Dissertations

Collection Website

http://scholarsrepository.llu.edu/etd/

Repository

Loma Linda University. Del E. Webb Memorial Library. University Archives

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