Abstract

Extracted human teeth were used in a study to determine the affect of an apical resection on the elimination of accessory canals and apical ramifications. The apices of 60 roots were resected 2 to 3 mm, an undercut slot preparation was fashioned and retrofillings of Cavit, zinc oxide and eugenol, and amalgam were placed. The identical procedure was carried out on another group of roots, except the apices were slightly beveled to the labial without any significant resection.

The apical portion of all the roots were immersed to the midroot level in methylene blue dye and subsequently dried. An examination of the apical 5 mm of all the roots was made with a dissecting microscope at 20X to determine the number of accessory foramina present and the number of accessory canals penetrating to the internal surface of the tooth and to what point they penetrated.

The investigator reported that a 2 to 3 mm apical resection, prior to retrofilling, reduces the percentage of roots containing accessory canals penetrating coronal to the retrofilling from 12 percent to 0 percent. A decrease was also seen in dye penetration into the main root canal implying an increase in the effectiveness of the periapical seal.

Department

Dentistry

School

Graduate School

First Advisor

Edwin B. Nutting

Second Advisor

Ronald E. Buell

Third Advisor

Raymond W. Dolph

Fourth Advisor

Elmer E. Kelln

Degree Name

Master of Science (MS)

Degree Level

M.S.

Year Degree Awarded

1970

Date (Title Page)

5-1970

Language

English

Library of Congress/MESH Subject Headings

Apicoectomy

Type

Thesis

Page Count

vi; 32

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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