Análisis bibliográfico de los huertos escolares como estrategia educativa y espacio de aprendizaje.

El trabajo que se ha realizado se basa en un análisis bibliográfico de veinte Trabajos de Fin de Grado, elaborados por futuros maestros de Educación Infantil y Primaria, de diferentes Universidades, tanto de tipo de Investigación como de Intervención, que han considerado el huerto escolar como estrategia educativa, espacio de aprendizaje y excep- cional recurso didáctico en el ámbito académico, recopilando información sobre el Huerto Escolar para saber la repercusión y transcendencia que tiene su uso dentro del aula y los aspectos positivos que aporta al alumnado

Sensory Input-Dependent Changes in Glutamatergic Neurotransmission- Related Genes and Proteins in the Adult Rat Trigeminal Ganglion.

Experience-dependent plasticity induces lasting changes in the structure of synapses, dendrites, and axons at both molecular and anatomical levels. Whilst relatively well studied in the cortex, little is known about the molecular changes underlying experience-dependent plasticity at peripheral levels of the sensory pathways. Given the importance of glutamatergic neurotransmission in the somatosensory system and its involvement in plasticity, in the present study, we investigated gene and protein expression of glutamate receptor subunits and associated molecules in the trigeminal ganglion (TG) of young adult rats. Microarray analysis of naïve rat TG revealed significant differences in the expression of genes, coding for various glutamate receptor subunits and proteins involved in clustering and stabilization of AMPA receptors, between left and right ganglion. Long-term exposure to sensory-enriched environment increased this left–right asymmetry in gene expression. Conversely, unilateral whisker trimming on the right side almost eliminated the mentioned asymmetries. The above manipulations also induced side-specific changes in the protein levels of glutamate receptor subunits. Our results show that sustained changes in sensory input induce modifications in glutamatergic transmission-related gene expression in the TG, thus supporting a role for this early sensory-processing node in experience-dependent plasticity.post-print804 K

Aplicación de electroencefalografía digital a la evaluación de la estabilidad en visión binocular

El trabajo aplica la instrumentación de registro de la actividad cortical mediante EEG digital. Nos hemos familiarizado con el manejo de dicha instrumentación y hemos diseñado un instrumento relacionado con la visión binocular. Tras ello se realizó un experimento para encontrar el alcance de estas técnicas para valorar la estabilidad en la visión binocular. El trabajo concluye con un análisis y discusión de los resultados obtenidos

Multiple Morphometric Assessment of Microglial Cells in Deafferented Spinal Trigeminal Nucleus.

Microglia (MG) are the first cells to react to the abnormal incoming signals that follow an injury of sensory nerves and play a critical role in the development and maintenance of neuropathic pain, a common sequel of nerve injuries. Here we present population data on cell number, soma size, and length of processes of MG in the caudal division of the spinal trigeminal nucleus (Sp5C) in control mice and at the peak of microgliosis (7 days) following unilateral transection of the infraorbital nerve (IoN). The study is performed combining several bias- and assumption-free imaging and stereological approaches with different immunolabeling procedures, with the objective of tackling some hard problems that often hinder proper execution of MG morphometric studies. Our approach may easily be applied to low-density MG populations, but also works, with limited biases, in territories where MG cell bodies and processes form dense meshworks. In controls, and contralaterally to the deafferented side, MG cell body size and shape and branching pattern matched well the descriptions of “resting” or “surveillant” MG described elsewhere, with only moderate intersubject variability. On the superficial laminae of the deafferented side, however, MG displayed on average larger somata and remarkable diversity in shape. The number of cells and the length of MG processes per mm3 increased 5 and 2.5 times, respectively, indicating a net 50% decrease in the mean length of processes per cell. By using specific immunolabeling and cell sorting of vascular macrophages, we found only a negligible fraction of these cells in Sp5C, with no differences between controls and deafferented animals, suggesting that blood-borne monocytes play at most a very limited role in the microgliosis occurring following sensory nerve deafferentation. In sum, here we present reliable morphometric data on MG in control and deafferented trigeminal nuclei using efficient methods that we propose may equally be applied to any morphometric population analysis of these cells under different physiological or pathological conditions.post-print1841 K

Calcium signalling mediated through a7 and non-a7 nAChR stimulation is differentially regulated in bovine chromaffin cells to induce catecholamine release

Producción CientíficaCa2+ signalling and exocytosis mediated by nicotinic receptor (nAChR) subtypes, especially the a7 nAChR, in bovine chromaffin cells are still matters of debate.We have used chromaffin cell cultures loaded with Fluo-4 or transfected with aequorins directed to the cytosol or mitochondria, several nAChR agonists (nicotine, 5-iodo-A-85380, PNU282987 and choline), and the a7 nAChR allosteric modulator PNU120596. Minimal [Ca2+]c transients, induced by low concentrations of selective a7 nAChR agonists and nicotine, were markedly increased by the a7 nAChR allosteric modulator PNU120596. These potentiated responses were completely blocked by the a7 nAChR antagonist a-bungarotoxin (a7-modulated-response). Conversely, high concentrations of the a7 nAChR agonists, nicotine or 5-iodo-A-85380 induced larger [Ca2+]c transients, that were blocked by mecamylamine but were unaffected by a-bungarotoxin (non-a7 response). [Ca2+]c increases mediated by a7 nAChR were related to Ca2+ entry through non-L-type Ca2+ channels, whereas non-a7 nAChR-mediated signals were related to L-type Ca2+ channels; Ca2+-induced Ca2+-release contributed to both responses. Mitochondrial involvement in the control of [Ca2+]c transients, mediated by either receptor, was minimal. Catecholamine release coupled to a7 nAChRs was more efficient in terms of catecholamine released/[Ca2+]c.2015-09-1

Clinical measurement of tooth wear: tooth Wear Indices

Attrition, erosion, and abrasion result in alterations to the tooth and manifest as tooth wear. Each classification corresponds to a different process with specific clinical features. Classifications made so far have no accurate prevalence data because the indexes do not necessarily measure a specific etiology, or because the study populations can be diverse in age and characteristics. Tooth wears (attrition, erosion and abrasion) is perceived internationally as a growing problem. However, the interpretation and comparison of clinical and epidemiological studies, it is increasingly difficult because of differences in terminology and the large number of indicators/indices that have been developed for the diagnosis, classification and monitoring of the loss of dental hard tissue. These indices have been designed to identify increasing severity and are usually numerical, none have universal acceptance, complicating the evaluation of the true increase in prevalence reported. This article considers the ideal requirements for an erosion index. A literature review is conducted with the aim of analyzing the evolution of the indices used today and discuss whether they meet the clinical needs and research in dentistr

Postoperative pain after one-visit root-canal treatment on teeth with vital pulps : comparison of three different obturation techniques

Objectives. To investigate and compare postoperative pain after one-visit root canal treatment (RCT) on teeth with vital pulps using three different obturation techniques. Study Design. Two hundred and four patients (105 men and 99 women) aged 12 to 77 years were randomly assigned into three treatments groups: cold lateral compaction of gutta-percha (LC), Thermafil technique (TT), and Backfill - Thermafil obturation technique (BT). Postoperative pain was recorded on a visual analogue scale (VAS) of 0 - 10 after 2 and 6 hours, and 1, 2, 3, 4, 5, 6 and 7 days. Data were statistically analyzed using multivariate logistic regression analysis. Results. In the total sample, 87% of patients experienced discomfort or pain in some moment between RCT and the seventh day. The discomfort experienced was weak, light, moderate and intense in 6%, 44%, 20% and 6% of the cases, respectively. Mean pain levels were 0.4 ± 0.4, 0.4 ± 0.3, and 1.4 ± 0.7 in LC, BT, and TT groups, respectively. Patients of TT group experienced a significantly higher mean pain level compared to other two groups (p < 0.0001). In TT group, all patients felt some level of pain at six hours after RCT. Conclusions. Postoperative pain was significantly associated with the obturation technique used during root canal treatment. Patients whose teeth were filled with Thermafil obturators (TT technique) showed significantly higher levels of discomfort than patients whose teeth were filled using any of the other two techniques

Patología implanto-endodóncica: concepto, tipos, diagnóstico, tratamiento y prevención.

La patología implanto-endodóncica (PIE) está descrita en la literatura implantológica como una de las causas de periimplantitis apical, entendida como la lesión osteolítica en la región apical del implante, con normal osteointegración de su porción coronal, provocada por la infección por contigüidad a partir de la lesión periapical del diente adyacente. Pero el concepto de PIE no sólo abarca la periimplantitis retrógrada por contaminación diente-a-implante, sino también los procesos inflamatorios periapicales en dientes adyacentes al implante por contaminación implante-adiente, cuando la colocación del implante provoca la necrosis del diente adyacente y la consiguiente periodontitis apical. Incluso podríamos incluir dentro de la PIE los casos de periimplantitis apical en implantes postextracción provocada por la infección residual presente en el alvéolo de un diente extraído con periodontitis apical. En definitiva, la PIE incluye las lesiones endodóncicas e implantarias apicales que son el resultado de infecciones residuales o por contigüidad entre diente e implante. En esta revisión bibliográfica se define y clasifica la PIE, repasándose la casuística publicada así como su influencia en el resultado del tratamiento implantológico

Influence of root canal instrumentation and obturation techniques on intra-operative pain during endodontic therapy

Objective: To analyse the influence of root canal instrumentation and obturation techniques on intra-operative pain experienced by patients during endodontic therapy. Method and Materials: A descriptive cross-sectional study was carried out in Ponferrada and Sevilla, Spain, including 80 patients (46 men and 34 women), with ages ranged from 10 to 74 years, randomly recruited. Patient gender and age, affected tooth, pulpal diagnosis, periapical status, previous NSAID or antibiotic (AB) treatment, and root canal instrumentation and obturation techniques were recorded. After root canal treatment (RCT), patients completed a 10-cm visual analogue scale (VAS) that ranked the level of pain. Results were analysed statistically using the Chi-square and ANOVA tests and logistic regression analysis. Results: The mean pain level during root canal treatment was 2.9 ± 3.0 (median = 2) in a VAS between 0 and 10. Forty percent of patients experienced no pain. Gender, age, arch, previous NSAIDs or AB treatment and anaesthetic type did not influence significantly the pain level (p > 0.05). Pain during root canal treatment was significantly greater in molar teeth (OR = 10.1; 95% C.I. = 1.6 - 63.5; p = 0.013). Root canal instrumentation and obturation techniques did not affect significantly patient?s pain during root canal treatment (p > 0.05). Conclusion: Patients feel more pain when RCT is carried out on molar teeth. The root canal instrumentation and obturation techniques do not affect significantly the patients? pain during RCT

Effect of the methacrylate-based endodontic sealer Epiphany on rat peritoneal macrophages viability

Objective: To evaluate the effect of the endodontic sealer Epiphany on rat peritoneal macrophages viability. Materials and methods: Peritoneal macrophages were obtained from Wistar rats and resuspended in RPMI- 1640 medium. Undiluted (crude extract) and diluted extracts to 10%, 1%, 0.1%, 0.01%, 0.001% and 0.0001% of Epiphany, AH 26 and AH Plus sealers on RPMI-1640 medium were tested for cytotoxicity to rat peritoneal macrophages using the trypan blue dye exclusion assay. Data were analyzed statistically by the Kruskal-Wallis and Mann-Whitney tests at 5% significance level. Results: Crude extract of Epiphany killed 51% of cells, but was less cytotoxic that crude extracts of AH Plus and AH 26, which killed 81% and 86% of cells, respectively. Ten-fold dilutions of Epiphany, AH Plus and AH 26 killed 44%, 56%, 62% of macrophages, respectively. A hundred dilution of Epiphany only killed 7% of macrophages, but the same dilution of AH Plus and AH 26 killed 10% and 31% of macrophages, respectively. Lower dilutions of sealer extracts caused minimal cell death as compared to the control groups (p>0.05). Conclusions: The methacrylate-based endodontic sealer Epiphany showed lower cytotoxicity on macrophages than resin-based sealers AH Plus and AH 26. Dilution of elutes of the three materials by tenfold markedly reduced their effect