Abstract

A comparison was made of ultrasonic filing versus hand filing using three solutions to flood the canals of 24 extracted human maxillary central incisors. A modified PR-30 Cavitron insert was used in a Cavitron 1010 unit for the ultrasonic filing. The clinical crown was removed with a diamond saw and water spray at the cemento-enamel junction. The two major groups were ultrasonic filing versus hand filing; the three subgroups were solution/solvents - 10% EDTA, 2.0% NaOCl, and distilled water.

After filing, the roots were grooved longitudinally with a high speed bur and cracked opened with a mallet and chisel. The total surface of the root canal of each specimen was examined under the Scanning Electron Microscope (SEM) at 20x and 2,000x. The amount of debris found covering and occluding the dentinal tubules was ranked by six observers on two consecutive days.

Non parametric statistics, the Kruskal-Wallis test, was used to evaluate the data. The top three rankings for the cleanest root canal systems were obtained by ultrasonic filing. Conversely, the bottom three rankings, the root canals with the most debris, were hand instrumented. Ultrasonic filing was significantly better (p < 0.005) than hand filing in removing root canal debris. The combination of ultrasonic filing and EDTA was significantly superior (p < 0.01) to any of the other combinations. The combination of hand filing and NaOCl was ranked the poorest.

Department

Dentistry

School

Graduate School

First Advisor

Raleigh R. Cummings

Second Advisor

Donald D. Antrim

Third Advisor

William L. Young

Fourth Advisor

William T. Jarvis

Fifth Advisor

Grenith J. Zimmerman

Degree Name

Master of Science (MS)

Degree Level

M.S.

Year Degree Awarded

1977

Date (Title Page)

6-1977

Language

English

Library of Congress/MESH Subject Headings

Endodontics; Root Canal Therapy

Type

Thesis

Page Count

ix; 88

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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