Title
The rat incisor in toxicologic pathology
Author
Kuijpers, M.H.M.
van de Kooij, A.J.
Slootweg, P.J.
TNO Voeding
Publication year
1996
Abstract
Microscopic examination of the incisors of rats and mice may reveal toxicologically significant changes. First, the incisor morphology reflects the nutritional status of the animal: fluctuations of mineral metabolism and vitamin availability are disclosed by the rodent incisors, because the incisors continue to grow during life. Similarly, direct or indirect changes of mineral metabolism by a test substance are reflected in the morphological appearance of the incisor dentin. In addition, hormonal disturbances may give rise to typical structural alterations of the incisor in the test animal. Certain chemicals may have deleterious effects upon the odontogenic tissues, resulting in tooth malformation and malocclusion and eventually in odontomas. Apparent nasal tumors may turn out to be of dental origin. Nasal luminal masses that are discussed within this scope are dental malformation, dental callus, and true odontogenic tumors. According to our experience, odontogenic tumors might possibly develop within the scope of a reaction to mechanical tooth trauma as well. In carcinogenicity studies, this consideration deserves attention when evaluating treatment related putative odontogenic tumors.
Subject
Toxicology
adenomatoid odontogenic tumor
calcium metabolism
cementoblastoma
dental callus
hyperparathyroidism
malocclusion
odontogenic ossifying fibroma
odontoma
pre-odontoma
Vitamin D hypervitaminosis
animal model
animal tissue
histopathology
incisor
mineral metabolism
nonhuman
odontogenic tumor
priority journal
rat
review
toxicology
vitamin d intoxication
animal
chemically induced disorder
injury
malocclusion
metabolism
mouse
pathology
physiology
tooth disease
Animalia
Rodentia
Animals
Incisor
Malocclusion
Mice
Rats
Tooth Diseases
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TNO identifier
233305
ISSN
0192-6233
Source
Toxicologic Pathology, 24 (3), 346-360
Document type
article