Abstract

Craig and Harrison12 examined the effect of demineralization of resected root ends on wound healing following periradicular surgery. Based on its microscopic evaluations from 4-45 days, it was proposed that demineralization of resected root ends enhances cementogenesis. The purpose of this study was to investigate the longer term effects of demineralization on cementogenesis using Mineral Trioxide Aggregate (MTA) or amalgam as root end filling materials. After completion of root canal therapy and endodontic surgery on seventy-two roots of mandibular second, third and fourth premolars of six beagle dogs, 32/72 of the root ends at random were etched with 50% citric acid (pH 1.0) for two minutes and the other 40/72 received no etching treatment. The root end cavities were then filled with either MTA or amalgam. The animals were sacrificed either 2 or 4 months later. Block sections containing the teeth and their surrounding tissues were removed, fixed, decalcified, sectioned, stained with H&E, and examined histomorphometrically in a double blind manner. The resected root ends were examined for cementum formation and degree of inflammation. The results were statistically analyzed using an independent t test with unequal variance. The results showed cementogenesis over resected root ends in both amalgam and MTA samples. In contract to amalgam, the use of MTA in the non-etched samples resulted in formation of cementum over this material. No significant difference was found between the amount of cementum formation on the resected root ends with and without acid etching for both amalgam and MTA. It was concluded that cementogenesis occurs in resected root ends eventually with or without acid etching but this procedure inhibits cementogenesis over the MTA.

Department

Dentistry

School

Graduate School

First Advisor

Mahmound Torabinejad

Second Advisor

Douglas J. McKendry

Third Advisor

Paul McMillan

Degree Name

Master of Science (MS)

Degree Level

M.S.

Year Degree Awarded

1997

Date (Title Page)

12-1997

Language

English

Library of Congress/MESH Subject Headings

Tooth Demineralization; Dental Cementum; Root Canal Filling Materials; Root Canal Therapy

Type

Thesis

Page Count

vii; 63

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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