amelogenesis imperfecta is a group of genetic disorders that affects both the morphology and quality of tooth structure. although the disease entity is primarily associated with abnormalities of dental and oral structures, it has been reported to be associated with a few syndromes. a 9-year-old girl with minor thalassemia referred to the department of pediatric dentistry of the mashhad faculty ...

This article has summarized parts of certain publica­tions about changes of hematopoietic elements, specially erythroid, during embryonic and fetal to the third postnatal life. The main purpose of this article is to familiarize medical students with the physiological characteristics of the blood system, chiefly in the first trimenon of postnatal life.  It is also aimed to prevent many incorrec...