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Delgadillo, J., (2009). Efectos de la carencia de riboflavina sobre el desarrollo del tejido dentoalveolar [Tesis, Universidad Nacional Mayor de San Marcos]. https://hdl.handle.net/20.500.12672/1337
Delgadillo, J., Efectos de la carencia de riboflavina sobre el desarrollo del tejido dentoalveolar [Tesis]. PE: Universidad Nacional Mayor de San Marcos; 2009. https://hdl.handle.net/20.500.12672/1337
@phdthesis{renati/477219,
title = "Efectos de la carencia de riboflavina sobre el desarrollo del tejido dentoalveolar",
author = "Delgadillo Avila, Juana Rosa",
publisher = "Universidad Nacional Mayor de San Marcos",
year = "2009"
}
Título: Efectos de la carencia de riboflavina sobre el desarrollo del tejido dentoalveolar
Autor(es): Delgadillo Avila, Juana Rosa
Asesor(es): Ayala Macedo, Carlos Guido Dante
Palabras clave: Vitamina C - Efectos fisiológicos; Deficiencia de vitamina B2; Dientes - Histología
Campo OCDE: https://purl.org/pe-repo/ocde/ford#3.00.00
Fecha de publicación: 2009
Institución: Universidad Nacional Mayor de San Marcos
Resumen: Esta investigación experimental tuvo como objetivo determinar los cambios histomorfológicos que ocurren en el tejido dentoalveolar de la mandíbula de una progenie de ratas albinas sometidas a dietas con diferentes concentraciones de Riboflavina (B2) e iguales concentraciones del resto de nutrientes, durante la gestación y la lactancia hasta los 28 días de edad.
La literatura no reporta estudios que aborden los efectos que se dan en el tejido dentoalveolar por ausencia o deficiencia de B2 desde el punto de vista histológico, y en especial cómo influye en el número de la población celular presente en la unidad dentoalveolar.
Se conformaron 4 grupos de ratas albinas (raza Holtzman) con capacidad de reproducción, según el requerimiento de Riboflavina: Grupo A, grupo control, con 100% de B2; Grupo B, con 50% de B2; Grupo C, con 25% de B2 y Grupo D, con 0% de B2. Las crías de las ratas de cada grupo fueron sacrificadas a diferentes edades: 0, 7, 14, 21 y 28 días de nacimiento, y se sometieron luego a un estudio histológico en tinción con 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. Microscópicamente revelan que la carencia total de Riboflavina (0%) en la dieta materna ocasiona en el tejido dentoalveolar de las crías una población celular menor de ameloblastos, odontoblastos, fibroblastos y cementoblastos, una cantidad muy escasa de fibras colágenas en el ligamento periodontal y un hueso alveolar muy adelgazado, siempre en relación al grupo control A (100% de B2); siendo dichos efectos más notorios a partir de los 7 días en adelante.
The aim of the present experimental study was to determine the histomorphological changes that occur in the dentoalveolar tissue of the jaw of an albino rats’ offspring which were fed with diets containing different concentrations of Riboflavin (B2) and equal concentrations of the rest of nutrients during gestation and nursing until 28 days of birth. Literature does not report studies approaching effects in the dentoalveolar tissue for absence or deficiency of Riboflavin from a histological perspective, especially how it influences on the number of cellular population in the dentoalveolar unit. Four groups of albino rats with reproduction capacity (Holtzman breed) were conformed according to requirements of Riboflavin: Group A, Control Group, with 100% of B2; Group B, with 50% of B2; Group C, with 25% of B2 and Group D, with 0% of B2. The offspring of each group were sacrificed at different ages: 0, 7, 14, 21 and 28 days of birth, and then were submitted to a histological examination applying H.E. and Masson stainings. Results obtained show that deficiency and total lack of B2 cause alterations on growth and development of the offspring, which was expressed as lesser height and decrease in corporal weight. Microscopically they reveal that total lack of Riboflavin (0%) in the mother’s diet causes a smaller population of ameloblasts, odontoblasts, fibroblasts and cementoblasts; a very scarce quantity of collagen fibers in periodontal ligament; and a very thin alveolar bone in the dentoalveolar tissue of the offspring with regard to the Control Group (100% of B2). These effects were more noticeable since 7 days of birth.
The aim of the present experimental study was to determine the histomorphological changes that occur in the dentoalveolar tissue of the jaw of an albino rats’ offspring which were fed with diets containing different concentrations of Riboflavin (B2) and equal concentrations of the rest of nutrients during gestation and nursing until 28 days of birth. Literature does not report studies approaching effects in the dentoalveolar tissue for absence or deficiency of Riboflavin from a histological perspective, especially how it influences on the number of cellular population in the dentoalveolar unit. Four groups of albino rats with reproduction capacity (Holtzman breed) were conformed according to requirements of Riboflavin: Group A, Control Group, with 100% of B2; Group B, with 50% of B2; Group C, with 25% of B2 and Group D, with 0% of B2. The offspring of each group were sacrificed at different ages: 0, 7, 14, 21 and 28 days of birth, and then were submitted to a histological examination applying H.E. and Masson stainings. Results obtained show that deficiency and total lack of B2 cause alterations on growth and development of the offspring, which was expressed as lesser height and decrease in corporal weight. Microscopically they reveal that total lack of Riboflavin (0%) in the mother’s diet causes a smaller population of ameloblasts, odontoblasts, fibroblasts and cementoblasts; a very scarce quantity of collagen fibers in periodontal ligament; and a very thin alveolar bone in the dentoalveolar tissue of the offspring with regard to the Control Group (100% of B2). These effects were more noticeable since 7 days of birth.
Enlace al repositorio: https://hdl.handle.net/20.500.12672/1337
Disciplina académico-profesional: Ciencias de la Salud
Institución que otorga el grado o título: Universidad Nacional Mayor de San Marcos. Facultad de Medicina. Unidad de Posgrado
Grado o título: Doctor en Ciencias de la Salud
Fecha de registro: 20-ago-2013
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