Abstract

It has been shown previously that a root surface which has been scaled, root planed and demineralized by topical application of citric acid in vitro, is dominated by exposed collagen fibrils. The purpose of this study was to examine the mechanism of healing and possible reattachment of soft periodontal connective tissue to the root planed and subsequently acid treated root surfaces and to determine whether new collagen fibrils produced in the connective tissue could attach to these exposed fibrils.

Full thickness tissue flaps were raised and the coronal 4-5 mm of the labial alveolar plate removed over the maxillary incisor roots of 7 Labrador retriever dogs providing 28 teeth for study. The exposed root surfaces were then planed to remove all cementum and some dentin before etching with citric acid (pH 1) for 3 min. The operation area was thoroughly irrigated and the flap reapposed and sutured in place at its original level. Healing was followed for 7, 14, 21 and 42 days at which times block sections were harvested and processed for transmission electron microscopic study. The findings appear to be consistent with previous reports of improved tissue regeneration with the use of citric acid.

The mechanism of healing of connective tissue to the root surface appears to be by way of interdigitation of newly produced collagen fibrils with the preexisting collagen fibrils of the exposed dentin matrix.

LLU Discipline

Periodontics

Department

Periodontics

School

Graduate School

First Advisor

Knut A. Selvig

Second Advisor

Max Crigger

Third Advisor

Gary Bogle

Degree Name

Master of Science (MS)

Degree Level

M.S.

Year Degree Awarded

1978

Date (Title Page)

9-1978

Language

English

Library of Congress/MESH Subject Headings

Tooth Root; Wound Healing

Type

Thesis

Page Count

viii; 78

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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