Pulpal changes following traumatic interruption of the circulation of the pulps in dogs teeth : a histological study
Date
1986
DOI
Authors
Moreno, Magdalena
Version
OA Version
Citation
Abstract
The purpose of this study was to observe experimentally the histological changes of the pulp as sequelae of traumatic interruption of circulation.
Two nine-month-old dogs were used for the experiment. A total sample of 28 teeth with immature apices was chosen and divided into two groups of fourteen each: experimental and control. Subsequently, these were subdivided and assigned to the different time intervals under which experimental observation was to be made: one day, four days, one week, two weeks, four weeks and six weeks. Through a simple surgical procedure, access to the periapical area was obtained and the blood supply to the pulp was surgically interrupted. At completion of the procedures at each of the time intervals, both animals were sacrificed; block sections of experimental areas were obtained and samples were prepared for histologic observation.
The microscopic examination of the experimental teeth showed repair occuring through the ingrowth of a well-vascularized, cellrich connective tissue; different degrees of inflammation were observed at some stages in some of the specimens. At six weeks after the operative procedure, the pulp tissue was reduced in ce11s and blood vessels, and a tissue that resembled bone or cementum occupied some of the original pulp cavity. In a few teeth, however the original pulp tissue appeared normal. In these teeth, the pulp preserved its integrity with an intact odontoblastic layer, and no atubular hard tissue could be seen.
The findings of the current study confirmed that the pulp of the teeth that have suffered traumatic interruption of their circulation, in the majority of the cases, calcify and are filled with a bone-like material; in a smaller percentage, it recuperates and subsists as a normal structure.
Description
PLEASE NOTE: This work is protected by copyright. Downloading is restricted to the BU community: please log in with a valid BU account to access and click Download. If you are the author of this work and would like to make it publicly available, please contact open-help@bu.edu.
Thesis (MSD)--Boston University School of Graduate Dentistry, 1986 (Endodontics)
Includes bibliography: leaves 68-75.
Thesis (MSD)--Boston University School of Graduate Dentistry, 1986 (Endodontics)
Includes bibliography: leaves 68-75.
License
This work is protected by copyright. Downloading is restricted to the BU community. If you are the author of this work and would like to make it publicly available, please contact open-help@bu.edu.