Early mammals: Teeth, jaws and finally … a skeleton!
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Early mammals: Teeth, jaws and finally … a skeleton!
Suprising new fossils - a skeleton and a jaw - give us a much clearer picture of mammals that lived during the time of non-avian dinosaurs; the new finds illuminate the early evolution of the lineage leading to modern mammals, and challenge traditional understanding of placental mammal evolution and biogeography.
متن کاملPain Related to the Teeth and Jaws
The precise diagnosis of "dental" pain is often a matter of considerable 1 stf# Its localization by the patient is often very poor, making it difficult to de n ^ c0nwhich tooth, if any, is responsible. It is quite common for the patient to p ^ ̂ fidently to a particular tooth as the site of the pain when the teeth themselve at fault. pulpi^' The causes of dental pain are most commonly dental car...
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That Paget's disease of bone may affect the jaws has been known since Moore's (1923) report of a case in which there was a bony tumour of the maxilla together with osteoporosis circumscripta of the frontal region, though until quite recently the disease in this site has been considered rare. Osteoporosis circumscripta itself has now been identified with an early phase of Paget's disease (Sosman...
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Panoramic radiographs from 1026 patients were examined for the presence of completely impacted teeth. The prevalence of completely impacted teeth in the edentulous jaw was lower than that in the dentate jaw in both the upper and lower jaws. The prevalence of completely impacted third molars in the edentulous jaw was also lower than that in the dentate jaw. However, there was no difference in th...
متن کاملEarly Fetal Activity in Mammals *
The study of embryonic and fetal activity is not new. Its roots stretch far back into biological history, but no review of the earlier work can be given here, nor is it necessary. Leonard Carmichael6 of Brown University has presented such a review in the second chapter of the revised second edition of A Handbook of Child Psychology. Though, in the treatment of certain controversial points and i...
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ژورنال
عنوان ژورنال: Current Biology
سال: 1998
ISSN: 0960-9822
DOI: 10.1016/s0960-9822(98)70174-5