Dentin apposition rates as markers of primate growth

Bibliographic Data

ID8317005
AuthorsS Molnar (0000-0001-8707-1079, Washington University in St. Louis), Thomas R Przybeck (Washington University in St. Louis), David G Gantt (Florida State University), R S Elizondo (Indiana University Bloomington), J E Wilkerson (Indiana University Bloomington)
Year1981
Volume55
Issue4
Pages443-453
Publication date1981-08-01
Open AccessYes
TypeARTICLE
VenueAmerican Journal of Physical Anthropology (JOURNAL)
Journal identifiersISSN: 0002-9483 • E-ISSN: 1096-8644
PublisherWiley (PUBLISHER • GB)
DOI10.1002/ajpa.1330550405
PMID7337139
OpenAlexW2002341425
LanguageEN
Citations received8
References cited12

The incremental lines of von Ebner frequently have been described as ultradian markers of dentin calcification. To determine the relationship between these lines and the quantity of dentin formed, reference was made to an in vivo marker of calcification, tetracycline. These markers were produced by injecting four juvenile rhesus monkeys periodically over a period of 175 days. These animals had been subjects in a heat stress study and were exposed to a series of heat stresses and cortisone injections. At the end of the study, undecalcified thin sections of premolars and second molars were prepared by standard histological techniques. We found that linear apposition rates increased in a gradient toward the pulp chamber. These rates varied within each tooth but not in corresponding parts of different teeth. Also, we determined that dentin apposition can be temporarily depressed by certain metabolic stresses. Heat load and cortisone significantly slowed dentin formation. Each depression, however, was followed by a “catch‐up” period. Incremental line distances also increased as a function of the distance from the dentoenamel junction. There was, however, no systematic relationship between apposition rates and incremental line distance; these distances did not deviate from the observed trends during periods of slowed apposition. Incremental lines may be interpreted, not as natural growth markers, but as structural phenomena which are a function of dentin geometry and tubule bending

Apposition · Biology · Dentin · Primate · Anatomy · Dentistry · Digestive system and related health · Medicine · Neuroscience · Orthodontics

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