A comparative study of important physical properties of various root canal sealers
Wiener, B. Harvey
MetadataShow full item record
The purpose of this study was to investigate two important physical properties of root canal sealers; setting time, and dimensional changes after setting. Eight root canal sealers were compared as to their setting times at various environmental conditions of temperature and relative humidity. These same sealers were also evaluated as to their dimensional changes after setting both qualitatively (visually and photographically) and quantitatively, using glass micropipettes of known volume. The results indicate that generally, most sealers appear to have adequate working and setting times and that temperature and relative humidity are important variables, which can exert a profound influence on setting time. Regarding dimensional changes, some sealers exhibited evidence of shrinkage after 7 and 10 days while most sealers exhibited shrinkage after 90 days, when allowed to set at conditions of room temperature and relative humidity (72°F - 50% RH± 2). It was concluded that further investigation of the physical properties of root canal sealers should be performed, with the aim at providing standardization of methods for study, and as well specifications for the materials themselves, similar to those which exist for other dental materials.
PLEASE NOTE: This work is protected by copyright. Downloading is restricted to the BU community: please click Download and log in with a valid BU account to access. If you are the author of this work and would like to make it publicly available, please contact email@example.com.Thesis (M.Sc.D.)--Boston University School of Graduate Dentistry, 1969.Bibliography, chart, colored photographs, tables included.
RightsThis 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 firstname.lastname@example.org.