Efectividad de los selladores con relleno y sin relleno aplicados a molares de ratas Sprague-Dawley en presencia de dieta cariogénica.

Tesis (Maestría en Ciencias Odontológicas con especialidad en Odontopediatría) UANL, 2014.

Tiempo de cierre de espacios de extracción con brackets MBT autoligables y convencionales.

Tesis (Maestría en Ciencias Odontológicas con orientación en Endodoncia) UANL, 2014.

Reducción del dolor posterior al ajuste ortodontico, utilizando un método de estímulo vibratorio.

Tesis (Maestría en Ciencias Odontológicas con especialidad en Ortodoncia) UANL, 2014.

Citotoxicidad del aloe vera y el formocresol en células mesenquimales de pulpa dental.

Tesis (Maestría en Ciencias Odontológicas en el área de Odontopediatría) UANL, 2014.

Prevalencia de enfermedad periodontal crónica en pacientes de 35 a 70 años del área metropolitana de Monterrey. Clínicas 2, 15, 26, 28 y 35 del IMSS.

Tesis (Maestría en Ciencias Odontológicas con especialidad en Periodoncia) UANL, 2014.

Propiedades antimicrobianas y cito-toxicidad de las nanopartículas de plata depositadas en placas de titanio -in vitro.

Tesis (Maestría en Ciencias Odontológicas con orientación en Ortodoncia) UANL, 2014.

Tratamiento ortodontico para la corrección de la clase II molar con el uso de la barra palatina T unido a un miniimplante.

Tesis (Maestría en Ciencias Odontológicas con orientación en Ortodoncia) UANL, 2014.

Tratamiento de la recesión gingival mediante el injerto de tejido conectivo subepitelial (técnica de Langer y Langer) en pacientes con abfracciones, estudio longitudinal.

Tesis (Maestría en Ciencias Odontológicas con especialidad en Periodoncia) UANL, 2014.

Análisis de biocompatibilidad de tres cementos de sellado apical a base de silicato de calcio.

Tesis (Maestría en Ciencias Odontológicas con orientación en Endodoncia) UANL, 2014.

Relación entre edad cronológica con los estadíos de maduración dental de Nolla.

Tesis (Maestría en Ciencias Odontológicas con especialidad en Ortodoncia) UANL, 2014.

Eficacia en el uso de las coronas estéticas de zirconia y acero cromo con frente estético prefabricadas en dientes anteriores de pacientes pediátricos.

Tesis (Maestría en Ciencias Odontológicas en el área de Odontopediatría) UANL, 2014.

Impacto de Lactobacillus casei Shirota en el desarrollo de Streptococcus mutans en pacientes con aparatología ortdóntica.

Tesis (Maestría en Ciencias Odontológicas en el área de Odontopediatría) UANL, 2014.

Cambios dentales en pacientes de 8-14 años de edad con comprensión maxilar, utilizando expansión rápida maxilar con Hyrax.

Tesis (Maestría en Ciencias Odontológicas en el área de Odontopediatría) UANL, 2014.

Studies on arbuscular mycorrhiza (AM) in the Alentejo (Portugal) using pea mutants resistant to AM fungi as a control tool for field conditions

The utilization and management of arbuscular mycorrhiza (AM) symbiosis may improve production and sustainability of the cropping system. For this purpose, native AM fungi (AMF) were sought and tested for their efficiency to increase plant growth by enhanced P uptake and by alleviation of drought stress. Pot experiments with safflower (Carthamus tinctorius) and pea (Pisum sativum) in five soils (mostly sandy loamy Luvisols) and field experiments with peas were carried out during three years at four different sites. Host plants were grown in heated soils inoculated with AMF or the respective heat sterilized inoculum. In the case of peas, mutants resistant to AMF colonization were used as non-mycorrhizal controls. The mycorrhizal impact on yields and its components, transpiration, and P and N uptake was studied in several experiments, partly under varying P and N levels and water supply. Screening of native AMF by most probable number bioassays was not very meaningful. Soil monoliths were placed in the open to simulate field conditions. Inoculation with a native AMF mix improved grain yield, shoot and leaf growth variables as compared to control. Exposed to drought, higher soil water depletion of mycorrhizal plants resulted in a haying-off effect. The growth response to this inoculum could not be significantly reproduced in a subsequent open air pot experiment at two levels of irrigation and P fertilization, however, safflower grew better at higher P and water supply by multiples. The water use efficiency concerning biomass was improved by the AMF inoculum in the two experiments. Transpiration rates were not significantly affected by AM but as a tendency were higher in non-mycorrhizal safflower. A fundamental methodological problem in mycorrhiza field research is providing an appropriate (negative) control for the experimental factor arbuscular mycorrhiza. Soil sterilization or fungicide treatment have undesirable side effects in field and greenhouse settings. Furthermore, artificial rooting, temperature and light conditions in pot experiments may interfere with the interpretation of mycorrhiza effects. Therefore, the myc- pea mutant P2 was tested as a non-mycorrhizal control in a bioassay to evaluate AMF under field conditions in comparison to the symbiotic isogenetic wild type of var. FRISSON as a new integrative approach. However, mutant P2 is also of nod- phenotype and therefore unable to fix N2. A 3-factorial experiment was carried out in a climate chamber at high NPK fertilization to examine the two isolines under non-symbiotic and symbiotic conditions. P2 achieved the same (or higher) biomass as wild type both under good and poor water supply. However, inoculation with the AMF Glomus manihot did not improve plant growth. Differences of grain and straw yields in field trials were large (up to 80 per cent) between those isogenetic pea lines mainly due to higher P uptake under P and water limited conditions. The lacking N2 fixation in mutants was compensated for by high mineral N supply as indicated by the high N status of the pea mutant plants. This finding was corroborated by the results of a major field experiment at three sites with two levels of N fertilization. The higher N rate did not affect grain or straw yields of the non-fixing mutants. Very efficient AMF were detected in a Ferric Luvisol on pasture land as revealed by yield levels of the evaluation crop and by functional vital staining of highly colonized roots. Generally, levels of grain yield were low, at between 40 and 980 kg ha-1. An additional pot trial was carried out to elucidate the strong mycorrhizal effect in the Ferric Luvisol. A triplication of the plant equivalent field P fertilization was necessary to compensate for the mycorrhizal benefit which was with five times higher grain yield very similar to that found in the field experiment. However, the yield differences between the two isolines were not always plausible as the evaluation variable because they were also found in (small) field test trials with apparently sufficient P and N supply and in a soil of almost no AMF potential. This similarly occurred for pea lines of var. SPARKLE and its non-fixing mycorrhizal (E135) and non-symbiotic (R25) isomutants, which were tested in order to exclude experimentally undesirable benefits by N2 fixation. In contrast to var. FRISSON, SPARKLE was not a suitable variety for Mediterranean field conditions. This raises suspicion putative genetic defects other than symbiotic ones may be effective under field conditions, which would conflict with the concept of an appropriate control. It was concluded that AMF resistant plants may help to overcome fundamental problems of present research on arbuscular mycorrhiza, but may create new ones.

El carnaval de los desencuentros : la construcción de los derechos humanos, sexuales y reproductivos en adolescentes

Este trabajo propone acercarse a la interpretación de las representaciones sociales de los derechos sexuales y reproductivos de la población adolescente y de las instituciones que los garantizan en tres localidades de Bogotá. Mediante una mirada integradora e interdisciplinaria, se realizan pesquisas en el universo simbólico de los adolescentes sobre cómo estos construyen cotidianamente sus comportamientos y prácticas sociales en el campo de la sexualidad y cuál es la respuesta institucional de los sectores educativo y salud que interactúan con ellos. Finalmente se presenta una alternativa de trabajo en el campo de los derechos sexuales y reproductivos para los adolescentes, que se traduce en comunicación educativa. La investigación apoya el trabajo del personal del campo de la salud responsable de los actuales programas de salud sexual y reproductiva, tanto en el campo de la prestación de servicios, como en el aseguramiento. Es una mirada útil para los tomadores de decisiones a nivel local y nacional, pues ofrece al sector educativo elementos de reflexión que ayudan a una búsqueda de encuentros con los adolescentes. Además, brinda a estos jóvenes herramientas de apoyo para su encuentro con los adultos.