The main research objeetive was to determine the effect that proteins and iron have; when they are included in the diet, over bone growing and development in Holztman albino rats 21 days old. They were divided in 4 experimental group: Al ( protein lOg., iron 29mg.), A2 (protein lOg., iron 46mg.), Bl(protein 5g., iron 29mg.), B2 (protein 5g., iron 46mg.) and were sacrificed 46 days after research beginning. There were taken cranium facial Skeleton, mandible and femur measures and they were stained with hemotixilin- eosin, Schiff peryodic acid and Potassic ferrocianurun. Our resuIts show that growing and deve/omen! of rats is directly related with protein and concentration of consumed dieto Weight and length of Craniofacial skeleton,mandible femur as well as number of osteoblasts, osteocites,osteclasts and hemosiderin of A groups were significantly greater in the relation with B groups. Gr...

The main research objeetive was to determine the effect that proteins and iron have; when they are included in the diet, over bone growing and development in Holztman albino rats 21 days old. They were divided in 4 experimental group: Al ( protein lOg., iron 29mg.), A2 (protein lOg., iron 46mg.), Bl(protein 5g., iron 29mg.), B2 (protein 5g., iron 46mg.) and were sacrificed 46 days after research beginning. There were taken cranium facial Skeleton, mandible and femur measures and they were stained with hemotixilin- eosin, Schiff peryodic acid and Potassic ferrocianurun. Our resuIts show that growing and deve/omen! of rats is directly related with protein and concentration of consumed dieto Weight and length of Craniofacial skeleton,mandible femur as well as number of osteoblasts, osteocites,osteclasts and hemosiderin of A groups were significantly greater in the relation with B groups. Gr...

El presente trabajo de investigación tuvo como objetivo determinar los cambios histológicos que ocurren en el fémur y en la mandíbula de la progenie de ratas albinas durante la gestación y la lactancia hasta los 28 días de edad, sometidas con dietas de diferentes concentraciones de Riboflavina (B2). Se conformaron cuatro grupos de ratas albinas raza Holtzman con capacidad de reproducción y según el requerimiento de Riboflavina: Grupo A (100% de B,), Grupo B (50% de B,) Grupo e (25% de B,) y Grupo D (0% de B,). Las crias de las ratas de cada grupo fueron sacrificadas a los 0,7,14,21, Y 28 días y se sometieron a un estudio histológico en tinción H.E. y Masson. Los resultados obtenidos muestran que la deficiencia o la carencia total de B2, ocasiona alteraciones en el crecimiento y desarrollo de las ratas crías, manifestándose una menor talla y disminución del peso corporal y m...

Several investigations have demonstrated the adverse effects of the hypovitaminosis A in the stomatological field, characterized by ectomesenehyrnal ceIls atrophy and osteoblastic hyperactivity disordered during the phase of the embryonic development; however, the information is limited to the histological manifestations by deficiency in later stages after birth; keeping in mind that we are a country in development with nutritional problems not resolved. The present study was carried out to establish the morphological changes of the dentoalveolar complex present, after birth, for vitamin A deficiency; for which, we used 20 Holstman rats, of 21 days of age, fed with diet of lacking vitamin A, The control group, in addition received weekly one dosis of 100 U.l. of retinol at last to complete the normal dietetic balance. The histological cuts, of rat incisors with avitaminosis A, colored wi...

Several investigations have demonstrated the adverse effects of the hypovitaminosis A in the stomatological field, characterized by ectomesenehyrnal ceIls atrophy and osteoblastic hyperactivity disordered during the phase of the embryonic development; however, the information is limited to the histological manifestations by deficiency in later stages after birth; keeping in mind that we are a country in development with nutritional problems not resolved. The present study was carried out to establish the morphological changes of the dentoalveolar complex present, after birth, for vitamin A deficiency; for which, we used 20 Holstman rats, of 21 days of age, fed with diet of lacking vitamin A, The control group, in addition received weekly one dosis of 100 U.l. of retinol at last to complete the normal dietetic balance. The histological cuts, of rat incisors with avitaminosis A, colored wi...