Urbanization, migration, and indigenous health in Peru.

INTRODUCTION: We compare demographic, socioeconomic, and anthropometric characteristics and blood pressure (BP), between rural and urban Peruvian indigenous women. These are preliminary results from a project on urbanization, migration, and health. METHODS: Data were collected cross-sectionally (2019) and compared between a rural (n = 92) and an urban (n = 93) community. RESULTS: Height: µ = 148.3 ± 5.0 cm (range = 137-162), weight: µ = 62.0 ± 11.5 (range = 37.5-108.7), median waist circumference = 89.0 (IQR = 15.8, range = 64.0-126.0), BMI = 28.3 (IQR = 6.2, range = 16.7-40.0), with no significant rural-urban differences. Systolic but not diastolic BP was significantly higher in urban versus rural women (median = 110, IQR = 18, range = 80-170 vs. median = 120, IQR = 10, range = 90-170, p = .002 and median = 70, IQR = 17, range = 50-100 vs. median = 70, IQR = 10, range = 60-100, p = .354), respectively. CONCLUSIONS: Despite major lifestyle differences, there were no anthropometric differences between rural and urban women. Higher systolic BP in urban women may reflect social/economic stressors rather than dietary factors.

Contenidos Mínimos de Cariología e indicadores de aplicación clínica en el Currículo de Pregrado para las Escuelas Dentales Chilenas / Minimum Contents of Cariology and Indicators of Clinical Application in the Undergraduate Curriculum for Chilean Dental Schools

RESUMEN Objetivo: El objetivo fue definir los contenidos mínimos y sus indicadores de aplicación clínica en el currículo de cariología para las escuelas de odontología chilenas. Metodología: Basados en los 5 dominios curriculares internacionales, se elaboró un documento que define los contenidos e indicadores de aplicación clínica para la enseñanza de cariología en Chile. Posteriormente, profesores de cariología de 20 de 21 escuelas de odontología chilenas (95%), sesionaron para revisar, retroalimentar y elaborar el documento final, denominado "Listado de contenidos mínimos e indicadores de aplicación clínica" en cariología para estudiantes de pregrado de odontología en Chile. Resultados: Se definieron 23 contenidos y 31 indicadores de aplicación clínica para la enseñanza de la cariología. La cantidad de contenidos e indicadores separados por dominio fueron respectivamente: conocimiento de base: 5 y 7; riesgo/detección y diagnóstico: 6 y 6; toma de decisiones/manejo preventivo no operatorio: 5 y 5; decisión de tratamiento operatorio: 4 y 9 y cariología basada en la evidencia: 3 y 4. Conclusiones: Se definieron los contenidos mínimos que tributan a cada dominio y sus indicadores de aplicación clínica para la enseñanza de la cariología en Chile.

ABSTRACT: The objective: was to define the minimum contents and their indicators of clinical application in the cariology curriculum for the Chilean Dental Schools. Methodology: Based on the 5 international curricular domains, a document defining the contents and indicators of clinical application for the teaching of cariology in Chile was elaborated. Later, cariology professors from 20 out of the 21 Chilean Dentistry Schools (95%) met to review, feedback and elaborate the final document, called "List of minimum contents and indicators of clinical application" in cariology for undergraduate dentistry students in Chile. Results: Twenty-three contents and 31 indicators of clinical application for the teaching of cariology were agreed upon. The amount of contents and indicators separated by domain respectively were: basic knowledge: 5 and 7; risk/detection and diagnosis: 6 and 6; decision making/non-operative preventive management: 5 and 5; decision of operative treatment: 4 and 9 and evidence-based cariology: 3 and 4. Conclusions: The minimum contents for each domain and its clinical application indicators for the teaching of cariology in Chile were defined.

Detection of Approximal Caries Lesions in Adults: A Cross-sectional Study.

Detection and management of posterior approximal caries lesions are still problematic. Inspection of approximal surfaces is challenging, and bitewing radiographs are used when direct vision is not possible. Unfortunately, there is no definite radiographic appearance to identify lesion cavitation with absolute certainty. Many lesions detected radiographically within the outer half of dentin are not cavitated, often resulting in unnecessary restorative treatment. Our study compared radiographic depth of approximal caries lesions with presence of cavitation in adults using visual inspection following temporary tooth separation (TTS). We conducted this observational descriptive cross-sectional study at two dental schools in two cities in Chile. Clinicians were unaware of radiographic depths of lesions and examined 147 participants (57.3% female and 42.7% male) following TTS. Using the common classification system that consists of E0 (no lesion), E1 (lesion within the outer half of enamel), E2 (lesion within the inner half of enamel), D1 (lesion within the outer third of dentin), D2 (lesion within the middle third of dentin), and D3 (lesion within the inner third of dentin), a trained dentist evaluated all the processed films. Cavitation was detected in only three sites (0.22%) within the E0 category, seven sites (3.41%) in E1, five sites (14.8%) in E2, four sites (14.8%) in D1, six sites (50%) in D2, and eight sites (61.5%) in D3. Considering that restorative treatment should be indicated strictly for cavitated lesions, our findings support indication for restorative treatment for D3 lesions and the rationale for TTS for D1-D2 caries lesions to allow direct visual inspection to determine whether there is surface cavitation.

Validación de un Cuestionario para Evaluar Riesgo de Caries en Preescolares en Santiago, Chile / Validation of a Questionnaire to Assess Risk of Caries in Preschool-Age Children in Santiago, Chile

RESUMEN: La Caries Temprana de la Infancia (CTI) es una forma de caries dental agresiva que afecta a niños, y en el último reporte nacional reveló una prevalencia de caries del 50 % en niños de 4 años de edad de la Región Metropolitana de Santiago (Soto et al., 2007). El objetivo de este estudio es validar un cuestionario que permita recolectar información relacionada con diversos factores de riesgo de caries en niños preescolares. Para la validación del cuestionario se determinó la validez de convergencia y discriminación, la consistencia interna y la confiabilidad test retest del instrumento en dos muestras independientes. Se aplicó el instrumento al cuidador principal de 118 preescolares entre 24 a 71 meses de edad, que asisten a jardines infantiles de dependencia particular (bajo riesgo de caries) y la Fundación INTEGRA (alto riesgo de caries) en la Región Metropolitana de Santiago, Chile. Se realizaron exámenes clínicos dentales por 2 odontólogos calibrados utilizando en el criterio OMS e ICDAS II. Se estimó un modelo de regresión logística y se evalúo la capacidad de discriminación del puntaje a través de una curva ROC. El cuestionario mostró una validez de discriminación de 0,95 entre ambos grupos y de la pregunta global 0,61 y una consistencia interna del cuestionario de 0,72. En la validez de convergencia se encontró que no existe asociación estadísticamente significativa entre el puntaje del cuestionario y la pregunta global dicotomizada (OD) 1,061. No obstante, se evidenció que si existe asociación estadísticamente significativa entre el puntaje del cuestionario y el grupo riesgo de caries (bajo y alto) (OD) 1,961. La estabilidad temporal mediante comparaciones Test - Retest calculado con el índice de Kappa osciló entre 0,37 a 1. Por lo tanto, se puede concluir que el presente cuestionario es un instrumento válido para discriminar riesgo de caries, permitiendo un mejor análisis de los determinantes de la caries dental en la población preescolar chilena.

ABSTRACT: Early Childhood Caries (ECC) is an aggressive form of tooth decay, and the last national unpublished reports reveal a caries prevalence of 50 % at 4 years of age in children, in the Santiago Metropolitan Region (Soto et al., 2007). The objective of this study is to validate a questionnaire that allows the collection of information related to several caries risk factors in preschoolchildren. For the validation of the questionnaire, the convergence and discrimination validity, the internal consistency and the retest, test reliability of the instrument were determined in two independent samples. The instrument was applied to the main caregiver of 118 preschoolers between 24 and 71 months of age, who attend private childcare centers (low caries risk) and the INTEGRA Foundation childcare (high caries risk) in the Metropolitan Region of Santiago, Chile. Dental clinical examinations were performed by two calibrated dentists using the OMS and ICDAS II criteria. A logistic regression model was estimated and the ability to discriminate the score through an ROC curve was evaluated. The questionnaire showed a validity of discrimination of 0.95 between both groups and of the global question 0.61 and an internal consistency of the questionnaire of 0.72. In the convergence validity, it was found that there is no statistically significant association between the questionnaire score and the dichotomized global question (RE) 1.061. However, it was evidenced that there is a statistically significant association between the questionnaire score and the caries risk group (low and high) (OD) 1.961. Temporal stability by means of Test - Retest comparisons calculated with the Kappa index ranged from 0.37 to 1. Therefore, it can be concluded that the present questionnaire is a valid instrument for discriminating caries risk, allowing a better analysis of the determinants of dental caries in the Chilean preschool population.

The relationship between trait psychopathy and emotional intelligence: A meta-analytic review.

Psychopathy is a personality construct that has been related to important emotional deficits. These findings have led to a growing interest in exploring if psychopathic traits are associated with emotional intelligence (EI). However, the literature exploring this association has revealed conflicting results. The aim of the present study was to provide a reliable estimate of the relationship between psychopathy traits and EI (measured as performance-based ability) through meta-analysis. A quantitative and systematic review of the literature using Scopus, Medline, Pubmed, and PsicINFO showed a total of 13 studies meeting inclusion criteria with a combined sample of 2401 participants. The meta-analysis revealed a significant negative relationship between both constructs, showing that higher psychopathic trait scores are related to lower EI levels. We propose several future research lines to clarify possible gaps and ambiguities in the current literature and a set of interesting clinical implications for the prevention, evaluation, and treatment of psychopathic traits by including EI factors in traditional models of psychopathy.

Performance on emotional tasks engaging cognitive control depends on emotional intelligence abilities: an ERP study.

Cognitive control is a key process in decision making and adequately adapting our behavior to the environment. Previous studies have provided evidence of a lower capacity for cognitive control in emotion-laden contexts in comparison with neutral contexts. The aim of the present research was to study changes in cognitive control performance as a function of emotional intelligence (EI) level in contexts involving emotional information. The study sample was composed of 2 groups of 22 participants each: the high and low EI group. Participants carried out an emotional go/no-go task while brain activity was recorded by EEG. N2 and P3 ERPs were used as indices of cognitive control processing. Participants with higher EI showed a larger N2, reflecting a greater capacity for cognitive control related to changes in conflict monitoring, and to a better detection and evaluation of the emotional stimuli. Moreover, in general, response inhibition accuracy was reduced when emotional information was involved in this process. Our findings reveal that neural mechanisms underlying tasks that engage cognitive control depend on emotional content and EI level. This study indicates the important role played by EI in the relationship between emotion and cognition. EI training may be a very useful tool for improving performance in emotion-laden contexts.

Association Between Body Mass Index and Caries Lesions in Preschool Children in Santiago, Chile / Asociación entre Lesiones de Caries y Estado Nutricional en Niños Preescolares de la Región Metropolitana

ABSTRACT: The objective of the study was to determine the association between caries prevalence and body mass index (BMI) in preschool children in Santiago, Chile. Children aged 2 and 3 years old (n = 342) attending 16 nursery schools in Santiago, Chile were examined to record the status of dental caries using the modified criteria of the International Caries Detection and Assessment System (ICDAS II) (International Caries Detection and Assessment System (ICDAS) Coordinating Committee, 2005). BMI was calculated for each of the subjects and their nutritional state was classified as underweight, normal-weight, overweight and obesity according to the WHO. The caries prevalence (ICDAS 2-6 > 0) of the children was 45.9 % (IC 95 % 40.50 - 51.21). Data showed that none of the preschoolers were underweight. 39.1 % were classified as normal-weight (IC 95 % 33.98 - 44.38), 34.8 % as overweight (IC 95 % 29.72 - 39.86) and 26 % as obese (IC 95 % 21.34 - 30.96). Normal-weight children had a prevalence of 51.5 % of ICDAS 2-6 lesions and prevalence of 28.3 % of ICDAS 5-6 lesions. Children with overweight had prevalence of 51.4 % ICDAS 2-6 lesions and of 19.3 % ICDAS 5-6 lesions, and obese children of 39.5 % and 25.8 % respectively. Subjects with normal-weight presented a mean of ICDAS 2-6 caries lesions significantly higher (p < 0.05) than the rest of the children. In conclusion, normal-weight preschool children presented a higher prevalence of caries lesions than those with overweight and obesity. Iso-BMI was found to be associated with lower dental caries and severity. Future studies should address which specific factors related to overweight in children might be protective against dental caries.

RESUMEN: La caries dental es una enfermedad crónica multifactorial que afecta a niños denominada Caries Temprana de la Infancia (CTI). Su etiología es multifactorial y se asocia a determinantes biológicos, conductuales y sociodemográficos. Entre estos, se ha planteado la obesidad como presunto factor de riesgo para el desarrollo de caries en población infantil. El objetivo de este estudio fue establecer si existía o no asociación entre la presencia de lesiones de caries y el estado nutricional en una muestra de 342 preescolares entre 1 y 4 años de edad, que asisten a jardines infantiles de la Fundación INTEGRA, en la Región Metropolitana de Santiago. Se realizaron exámenes clínicos dentales y medición de la talla y peso. Se calculó IMC para cada uno de los sujetos y su estado nutricional fue clasificado como por debajo del peso adecuado, peso normal o normopeso, sobrepeso y obesidad según los gráficos y tablas de la OMS. La prevalencia total de lesiones de caries (ICDAS II = 2 -6) fue de 45,9 % (IC 95 % 40,59 - 51,21). El estado nutricional de la muestra completa fue de 0 % bajo el peso normal, 134 (39,1 %) niños presentaron peso normal (IC 95 % 33,98 - 44,38), 119 niños (34,8 %) presentaron sobrepeso (IC 95 % 29,72 - 39,86) y a 89 (26 %) niños se les diagnosticó obesidad (IC 95 % 21,34 - 30,96). Los sujetos con normopeso presentaron un promedio de lesiones de caries (ICDAS II = 2 - 6) significativamente mayor (p < 0,05). Por lo tanto, se puede concluir que los preescolares con peso normal presentaron mayor número de lesiones de caries de acuerdo al criterio ICDAS II, que aquellos preescolares con sobrepeso y obesidad.

Activación con puntas Eddy(R): A propósito de un caso / Activation tips Eddy(R): With regard to a case

El objetivo del tratamiento de conductos es prevenir o curar la periodontitis apical. Para lograr el éxito es necesario una correcta limpieza y posterior obturación tridimensional. La irrigación y desinfección del sistema de conductos es una parte imprescindible del tratamiento. Su objetivo es eliminar las bacterias y el remanente pulpar contaminado. No obstante, a pesar de muchos esfuerzos siguen existiendo nichos y cepas bacterianas causantes del fracaso endodóntico. Eddy(R), es un nuevo sistema de activación sónica con unas características específicas de su punta de poliamida, la cual oscila a alta amplitud accionada por una pieza de mano generando intraconducto unas microturbulencias o microcorrientes que ayudan en la desinfección microbiana. A continuación se expone un caso, donde se explica paso por paso la técnica clínica de las puntas de activación Eddy®, responsables de una correcta desinfección gracias al movimiento del irrigante

The aim of a root canal treatment is to prevent the apical periodontitis. An effective cleaning and subsequently a three-dimensional obturation are needed to achieve success. The irrigation and disinfection of the root canal system is a necessary part of the root canal treatment. Its aim is to eliminate the bacteria and the infected remnant pulp tissue. Nevertheless, despite our efforts, there are still niches and bacterial strains that cause endodontic failure. Eddy(R) is a new system of sonic activation with specific characteristics of its polyamide’s tip, which oscillates with high amplitude powered by a handpiece generating microturbulences or microstream that helps in bacterial disinfection. Below a clinical case is presented, in which we are going to explain step by step the clinical technique of the activation tips Eddy® responsible for a proper disinfection thanks to the irrigant movement

Probiotic Compared with Standard Milk for High-caries Children: A Cluster Randomized Trial.

The aim of this study was to compare milk supplemented with probiotic lactobacilli with standard milk for the increment of caries in preschool children after 10 mo of intervention. The study was a triple-blind, placebo-controlled randomized trial. Participants were children aged 2 and 3 y (n = 261) attending 16 nursery schools in a metropolitan region in Chile. Nursery schools were randomly assigned to 2 parallel groups: children in the intervention group were given 150 mL of milk supplemented with Lactobacillus rhamnosus SP1 (10(7) CFU/mL), while children in the control group were given standard milk. Interventions took place on weekdays for 10 mo. Data were collected through a clinical examination of participants. The primary outcome measure was the increment of caries in preschool children. This was assessed using the International Caries Detection and Assessment System (ICDAS). The dropout rate was 21%. No differences in caries prevalence were detected between the groups at baseline (P = 0.68). After 10 mo of probiotic intake, the caries prevalence was 54.4% in the probiotic group and 65.8% in the control group. The percentage of new individuals who developed cavitated lesions (ICDAS 5-6) in the control group (24.3%) was significantly higher than that in the probiotic group (9.7%). The increment of dental caries showed an odds ratio of 0.35 (P < 0.05) in favor of the probiotic group. At the cavitated lesion level, the increment of new caries lesions within the groups showed 1.13 new lesions per child in the probiotic group compared with 1.75 lesions in the control group (P < 0.05). The probiotic group showed an increment of 0.58 ± 1.17 new lesions compared with 1.08 ± 1.70 new lesions observed in the control group. The difference in caries increment was significant at the cavitated lesion level (P < 0.01). In conclusion, the regular long-term intake of probiotic-supplemented milk may reduce caries development in high-caries preschool children (ClinicalTrials.gov: NCT01648075).

Single administration of recombinant IL-6 restores the gene expression of lipogenic enzymes in liver of fasting IL-6-deficient mice.

BACKGROUND AND PURPOSE: Lipogenesis is intimately controlled by hormones and cytokines as well as nutritional conditions. IL-6 participates in the regulation of fatty acid metabolism in the liver. We investigated the role of IL-6 in mediating fasting/re-feeding changes in the expression of hepatic lipogenic enzymes. EXPERIMENTAL APPROACH: Gene and protein expression of lipogenic enzymes were examined in livers of wild-type (WT) and IL-6-deficient (IL-6(-/-) ) mice during fasting and re-feeding conditions. Effects of exogenous IL-6 administration on gene expression of these enzymes were evaluated in vivo. The involvement of STAT3 in mediating these IL-6 responses was investigated by using siRNA in human HepG2 cells. KEY RESULTS: During feeding, the up-regulation in the hepatic expression of lipogenic genes presented similar time kinetics in WT and IL-6(-/-) mice. During fasting, expression of lipogenic genes decreased gradually over time in both strains, although the initial drop was more marked in IL-6(-/-) mice. Protein levels of hepatic lipogenic enzymes were lower in IL-6(-/-) than in WT mice at the end of the fasting period. In WT, circulating IL-6 levels paralleled gene expression of hepatic lipogenic enzymes. IL-6 administration in vivo and in vitro showed that IL-6-mediated signalling was associated with the up-regulation of hepatic lipogenic enzyme genes. Moreover, silencing STAT3 in HepG2 cells attenuated IL-6 mediated up-regulation of lipogenic gene transcription levels. CONCLUSIONS AND IMPLICATIONS: IL-6 sustains levels of hepatic lipogenic enzymes during fasting through activation of STAT3. Our findings indicate that clinical use of STAT3-associated signalling cytokines, particularly against steatosis, should be undertaken with caution.

Absence of Non-Carious Cervical Lesions (NCCLs) in a Chilean Pre-Columbian Sample with Severe Occlusal Tooth Wear / Ausencia de Lesiones Cervicales no Cariosas (NCCLs) en una Muestra Chilena Precolombina con Severo Desgaste Oclusal

This study evaluates the non-carious cervical lesions (NCCLs) and the occlusal tooth wear in a pre-Columbian sample (n= 67, adults) from San Pedro de Atacama (North of Chile, 400-1300 BCE). The cervical regions of tooth were observed for loss of enamel and/or dentine in order to identify them as NCCLs and the tooth wear was characterized by the Basic Erosive Wear Examination (BEWE) index. None of the individuals analyzed presented NCCLs, whereas the 98.5% (66/67) of them showed occlusal wear. The mean BEWE index was 2.5, indicating severe dental wear (3 being the highest possible score of BEWE). This lack of relation among severe tooth wear and NCCLs gives support to the idea of loss of crown height reduces cervical stress and develop of NCCLs in archaeological populations.

Este estudio evalúa las lesiones cervicales no cariosas (NCCLs) y el desgaste dental oclusal en una muestra precolombina (n= 67, adultos) de San Pedro de Atacama (Norte de Chile, 400-1300 AEC). Se analizó la perdida de esmalte y/o dentina en las áreas cervicales de los dientes con el propósito de identificarlas como NCCLs y el desgaste dental fue evaluado según el índice Basic Erosive Wear Examination (BEWE). Ninguno de los individuos analizados presentó NCCLs, mientras el 98,5% (66/67) de ellos mostró desgaste oclusal. El promedio del índice BEWE fue de 2,5, indicando severo desgaste dental (siendo 3 el puntaje más alto posible). La falta de relación entre severo desgaste dental y NCCLs apoya la idea que la pérdida de altura de las coronas reduce el estrés cervical y el desarrollo de NCCLs en poblaciones arqueológicas.

Utilidad de la micro tomografía computarizada en el estudio de la anatomía dentaria / Micro-computed tomography utility in the study of dental anatomy

El objetivo de este estudio es explicar en qué consiste la microtomografía computarizada (µTC) y qué resultados nos puede aportar en el estudio de la complicada anatomía pulpar. Para ello seleccionamos cuatro dientes de un mismo grupo dentario, el primer premolar inferior. Este diente puede presentar una gran variabilidad de anatomías complejas en su sistema de conductos descritas en múltiples artículos clínicos y de investigación. Las muestras fueron sometidas a un análisis microtomográfico (µTC), tras lo que obtuvimos una reconstrucción de su anatomía externa e interna. Entre las posibilidades de la µTC se han descrito el estudio de la estructura ósea, el análisis del espesor de esmalte, la medición de superficies y volúmenes de los dientes y la evaluación de técnicas de instrumentación. El resultado del estudio mediante µTC de morfologías tan extremas como las presentes en el primer premolar inferior, nos muestra unas posibilidades mayores de entendimiento y conocimiento de la anatomía interna dentaria

The aim of this study is to explain the micro-computed tomography (µTC) and the results it can provide in the study of the complicated anatomy of the pulp. We selected four teeth in the same dental group, the first premolar. This tooth can present a great variability of complex anatomies in its canal system, described in multiple clinical and research articles. The samples were subjected to micro-tomographic analysis (µTC) and then, their external and internal anatomies were reconstructed. Among the possibilities of µTC are the study of bone structure, the analysis of enamel thickness, the measurement of surface areas and volumes of the teeth and the evaluation of instrumentation techniques. The result of the study of morphologies as extreme as those present in the first premolar by µTC, shows greater possibilities of understanding and knowing its anatomy

Expansores tisulares en reconstrucción de defectos craneofaciales. Estudio multicéntrico retrospectivo / Tissue expansion in reconstruction of craniofacial defects. Multicenter retrospective study

El objetivo del presente estudio es describir y analizar el uso de expansores tisulares para reconstrucción de los defectos craneofaciales en 3 centros de alta complejidad del país (Chile). Corresponde a un estudio descriptivo retrospectivo de pacientes tratados en el Departamento de Cirugía Plástica del Hospital Militar de Santiago, Clínica Alemana e Instituto de Neurocirugía Asenjo entre los años 2004 y 2012 por defectos en el área craneofacial. Recopilamos en un total de 37 pacientes los datos médicos, demográficos, de la operación, tiempo, volumen, número de expansores utilizados, registros fotográficos, complicaciones, volumen de sobrexpansión, y un cuestionario de satisfacción de los pacientes en relación al uso del expansor tisular. Se obtuvo cobertura adecuada del defecto en la totalidad de los casos. En 16 pacientes (43,2 %) mediante el uso de 2 expansores tisulares; en 15 (40,5 %) con 1 expansor; en 4 (10,8 %) con 3 expansores y en 2 pacientes (5,4 %) con 4 expansores. El tiempo total de tratamiento en promedio correspondió a 70 días, con un porcentaje de complicaciones menores en un 35,1 % de los casos, y mayores en un 2,7 % . En relación al cuestionario aplicado, obtuvimos un 94,6 % de respuestas positivas respecto al resultado final de la cirugía; sólo un 54,1 % de los pacientes recomendaría este método de expansión tisular a un tercero. En conclusión, nuestro estudio determina que se logró un buen resultado final, con bajo porcentaje de complicaciones mayores y alto porcentaje de satisfacción en el resultado de la cirugía por parte de los pacientes. La aplicación del cuestionario, resulta útil para la obtención de información más objetiva respecto a la opinión sobre este procedimiento por parte de los pacientes (AU)

Our goal is to describe and analyze the use of tissue expanders for reconstruction of craniofacial defects in 3 highly complex centers in the country (Chile). Corresponds to a retrospective study of patients treated at Hospital Militar de Santiago, Clinica Alemana e Instituto de Neurocirugia Asenjo between 2004 and 2012 by defects in the craniofacial area. We collected in a total of 37 patients medical data, demographic data, operation time, volume, number of expanders used, photographic records, complications, volume overexpansion, and a questionnaire regarding patients' satisfaction with the use of tissue expander. Adequate coverage of the defect was obtained in all cases. In 16 patients (43,2 %) using 2 tissue expanders; in 15 (40,5 %) with 1 expander; in 4 (10,8 %) with 3 expanders and in 2 (5,4 %) with 4 expanders. Total treatment time corresponded on average to 70 days, with a percentage of minor complications in 35,1 % patients and major complications in 2,7 % patients. Regarding the applied questionnaire we obtained 94,6 % of positive responses regarding the final result of the surgery; only 54,1 % of the patients would recommend this method of tissue expansion to a third party. In our study, a good final result was achieved with low rate of major complications and a high rate of satisfaction in the outcome of surgery by patients. The administration of the questionnaire is useful for obtaining more objective information regarding the review of this process by patients undergoing this surgery (AU)

Genetic disorders of pediatric MEN2A patients in the south of Spain

INTRODUCTION: Medullary thyroid carcinoma (MTC) is observed in nearly 100 % of patients with multiple endocrine neoplasia type 2A (MEN2A). The gene responsible for MEN2A is the RET proto-oncogene and about 95 % of MEN2A patients have germline mutations in five specific cysteine codons (609, 611, 618, 620 and 634). MATERIALS AND METHODS: A retrospective study of children from families with MEN2A in our geographic area was performed. Variables analyzed included demographic data, kinship relations, age at genetic screening, age at prophylactic thyroidectomy, genetic mutation subtype and histological findings. The genetic study consisted in direct molecular analysis by automatic sequencing of RET mutated exon in the studied family. RESULTS: We performed 13 prophylactic total thyroidectomies from 1997 to 2013, 8 females and 5 males. The mean age at genetic diagnosis was 3.8 years (range 2-5.9). All children belonged to four interconnected families living in the same geographic area and presenting C634Y mutation in all the cases. The mean age at prophylactic thyroidectomy was 5.6 years (range 4-8.5). Histopathological findings demonstrated seven cases of C-cells nodular hyperplasia, one lymphocytic thyroiditis, two without evidence of disease, two micro-carcinomas and one multicentric carcinoma. CONCLUSION: The mutation found in the RET proto-oncogene responsible for MEN2A in pediatric patients in the south of Spain is the C635Y. It is considered a high-risk mutation, associated with an earlier malignant transformation and development of MTC (AU)

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Anatomía externa e interna en el primer premolar Inferior / External and internal anatomy in the first premolar

La raíz y la morfología del sistema de conductos del primer premolar inferior pueden llegar a ser extremadamente complejas y requiere de una evaluación muy cuidadosa antes de afrontar su tratamiento de conductos. El propósito de nuestro trabajo fue realizar un amplio estudio bibliográfico sobre su anatomía externa e interna. Los diferentes artículos publicados se dividieron y clasificaron en base a diferentes conceptos anatómicos que nos pudieran servir en la interpretación de la propia documentación recopilada. Los resultados de la revisión bibliográfica fueron organizados y estudiados en base a: número de raíces, número de conductos y su morfología, variaciones por razón de sexo, variaciones por origen étnico y artículos clínicos publicados en relación al primer premolar inferior

The root and the morphology of the canal system of the first mandibular premolar can become extremely complex and requires careful evaluation before facing its root canal treatment. The purpose of our work was to conduct a comprehensive literature review on its external and internal anatomy. The various articles published were divided and classified based on different anatomical concepts that we could serve in the interpretation of the documentation collected. The results of the literature review were organized and studied based on: number of roots, number of canals and morphology, gender variations, variations by ethnicity and clinical articles published over the first premolar