Evaluation of a new intraoral paralleling device for creating guiding planes: A pilot study

Aim: The aim of the study was to assess the accuracy of a new intraoral paralleling device for creating proximal guiding planes for removable partial dental prostheses. Methods and Materials: Thirty gypsum casts were divided into two groups in which the proximal surfaces of selected teeth were prepared using either a surveying device (Group 1) or the new ParalAB paralleling device (Group 2). In each cast guiding planes were prepared on the distal surface of the maxillary left canine (A), on the mesial and distal surfaces of the maxillary left second molar (B and C), and on the distal surface of the maxillary right canine (D). Each prepared surface formed an angle related to the occlusal plane that was measured five times and averaged by one operator using a tridimensional coordinate machine. Results: The mean guiding plane angles (± standard deviation) for the prepared surfaces were A=91.82° (±0.48°, B=90.47° (±0.47°, C=90.21° (±0.76°, and D=90.50° (±0.73°) for the dental surveyor (Group 1) and A=92.18° (±0.87°), B=90.90° (±0.85°), C=90.07° (±0.92°), and D=90.66° (±0.76°) for the ParalAB paralleling device (Group 2). A two-way ANOVA, Tukey's, and Levène's tests (at p<0.05) revealed statistically significant differences among surfaces prepared by both groups and that one surface Conclusions: The ParalAB device was able to prepare parallel surfaces and despite significant difference between groups, the ParalAB presented a small deviation from absolute parallelism and can be considered a valid method to transfer guide plans in the fabrication of removable partial dentures. Clinical Significance: The preparation of suitable guiding planes on abutment teeth during the fabrication of removable partial dentures is dependent on the ability of the operator and requires considerable chair time. When multiple teeth are involved, achieving parallelism between abutment surfaces can be technically challenging, especially in posterior regions of the mouth. The ParalAB prototype intraoral paralleling device can aid the clinician during the preparation of accurate guiding planes with a minimum degree of occlusal divergence. © 2010 Seer Publishing LLC.

Effect of thickness of indirect restoration and distance from the light-curing unit tip on the hardness of a dual-cured resin cement

This study evaluated the Knoop hardness and polymerization depth of a dual-cured resin cement, light-activated at different distances through different thicknesses of composite resin. One bovine incisor was embedded in resin and its buccal surface was flattened. Dentin was covered with PVC film where a mold (0.8-mm-thick and 5 mm diameter) was filled with cement and covered with another PVC film. Light curing (40 s) was carried out through resin discs (2, 3, 4 or 5 mm) with a halogen light positioned 0, 1, 2 or 3 mm from the resin surface. After storage, specimens were sectioned for hardness measurements (top, center, and bottom). Data were subjected to split-plot ANOVA and Tukey's test (α=0.05). The increase in resin disc thickness decreased cement hardness. The increase in the distance of the light curing tip decreased hardness at the top region. Specimens showed the lowest hardness values at the bottom, and the highest at the center. Resin cement hardness was influenced by the thickness of the indirect restoration and by the distance between the light-curing unit tip and the resin cement surface.

Prevalence and microscopic features of enamel pearls from permanent human molars

Enamel pearls are ectopic structures observed mainly on the roots of permanent teeth and could be related to periodontal diseases. Aim: To evaluate the prevalence of enamel pearls in extracted human molars and characterize their structures using light and scanning electron microscopy. Methods: The study comprised 2,201 extracted human permanent molars. The teeth were analyzed and classified according to morphological features. The presence, location and shape of enamel pearls were investigated. Fifteen human molars with enamel pearls were embedded in acrylic resin and observed by light microscopy. Results: Seventy-one enamel pearls were identified on third molar root. Microscopically, most pearls were composed of prismatic irregular enamel and normal dentin. The dentinoenamel junction presented an irregular course. The number of dentinal tubules was normal and they presented curvature to continue within the root dentin of the carrier tooth. Dentinal tubules below the enamel pearls were closer to each other. Conclusions: Scanning electron microscopic analysis revealed that the enamel pearls were similar to coronal enamel.

Rogadinae e Orgilinae (Hymenoptera, Braconidae) em cultura de café em Cravinhos, SP, Brasil

Pós-graduação em Agronomia (Entomologia Agrícola) - FCAV

As formas do humor. Copi: um caso argentino

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Chiquinha Gonzaga e o Maxixe

Pós-graduação em Música - IA

Notas de Población Vol.38 N° 93

Este número de la Revista Notas de población contiene siete artículos, los cuales tratan diversos temas sociodemográficos de gran interés. En el primer artículo de Joice Melo se centra en el caso específico de los adolescentes en conflicto con la ley en el Brasil. El segundo artículo analiza la maternidad sin matrimonio en América Latina, prestando atención a la prevalencia actual de la fecundidad no matrimonial en los distintos países latinoamericanos. Por su parte, Montserrat Solsona analiza desde una perspectiva cualitativa las biografías de divorcio y presenta algunos resultados acerca de la nitidez y la reversibilidad de los cambios de estado, así como de sus implicaciones en la determinación de los factores determinantes y las trayectorias familiares posteriores al divorcio. En el cuarto artículo, Denise Helena França Marques y Geovane da Conceição Máximo investigan —por medio de una microsimulación contrafáctica, y teniendo en cuenta las características y atributos socioeconómicos y demográficos de los brasileños retornados durante el período 1995-2000 desde los estados Unidos y Paraguay— la importancia de la relación entre el nivel de escolaridad y el ingreso medio por hora de los emigrantes brasileños que retornan de los Estados Unidos luego de un período fijo, en el caso que estos presentaran la misma distribución de escolaridad que los retornados del Paraguay y viceversa. En tanto, Jorge Rodríguez analiza los efectos en la estructura demográfica y la segregación residencial de la migración interna en ciudades de América Latina, usando para ello metodologías novedosas que permiten estimar el efecto neto y exclusivo de la migración en atributos sociodemográficos de las zonas de origen y de destino mediante el procesamiento de microdatos censales. Mientras que en el sexto artículo, Pinto da Cunha realiza una reflexión sobre las posibles relaciones entre movilidad espacial, vulnerabilidad y procesos de segregación socioespacial de la población en las grandes aglomeraciones urbanas. Finalmente, José Eustáquio Diniz y Suzana Cavenaghi presentan y discuten las cuestiones relativas al cálculo del déficit habitacional utilizado en el Brasil, de acuerdo con la metodología propuesta por la Fundación João Pinheiro y una metodología de cálculo de la demanda habitacional demográfica desarrollada en conjunto con la Caixa Econômica Federal del Brasil, a partir de la utilización de los datos de los censos demográficos (y encuestas de hogares).

FEA and microstructure characterization of a one-piece Y-TZP abutment

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Quantitative phase analysis from X-ray diffraction in Y-TZP dental ceramics: A critical evaluation

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Amélia Beviláqua que era mulher de verdade: a memória construída da esposa de Clóvis Beviláqua

Based on Clovis Bevilaqua’s four biographies which present three stigmas of the character - being the son of a priest, engaged in a large grammatical legal controversy with Rui Barbosa in making the Civil Code of 1917 and married to a wife of exotic modes - we discuss the built memory of Amelia Carolina Freitas Bevilaqua, who is marked as a pioneer of the feminist movement in Brazil and also upstart writer who aspired to join the Brazilian Academy of Letters. Among other negative adjectives, she was sloppy, not vain and misaligned in dress, futile or adulterous.

Orgilinae (Hymenoptera: Braconidae) en cultivo de café de Cravinhos, SP, Brasil

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Cross-cultural adaptation and assessment of the reliability and validity of the Core Outcome Measures Index (COMI) for the Brazilian-Portuguese language

The use of patient-orientated questionnaires is of utmost importance in assessing the outcome of spine surgery. Standardisation, using a common set of outcome measures, is essential to aid comparisons across studies/in registries. The Core Outcome Measures Index (COMI) is a short, multidimensional outcome instrument validated for patients with spinal disorders. This study aimed to produce a Brazilian-Portuguese version of the COMI. A cross-cultural adaptation of the COMI into Brazilian-Portuguese was carried out using established guidelines. 104 outpatients with chronic LBP (> 3 months) were recruited from a Public Health Spine Medical Care Centre. They completed a questionnaire booklet containing the newly translated COMI, and other validated symptom-specific questionnaires: Oswestry Disability Index (ODI) and Roland Morris disability scale (RM), and a pain visual analogue scale. All patients completed a second questionnaire within 7-10 days to assess reproducibility. The COMI summary score displayed minimal floor and ceiling effects. On re-test, the responses for each individual domain of the COMI were within 1 category in 98% patients for the domain 'function', 96% for 'symptom-specific well-being', 97% for 'general quality of life', 99% for 'social disability' and 100% for 'work disability'. The intraclass correlation coefficients (ICC2,1) for COMI pain and COMI summary scores were 0.91-0.96, which compared favourably with the corresponding values for the RM (ICC, 0.99) and ODI (ICC, 0.98). The standard error of measurement for the COMI was 0.6, giving a "minimum detectable change" (MDC95%) of approximately 1.7 points i.e., the minimum change to be considered "real change" beyond measurement error. The COMI scores correlated as hypothesised (Rho, 0.4-0.8) with the other symptom-specific questionnaires. The reproducibility of the Brazilian-Portuguese version of the COMI was comparable to that of other language versions. The COMI scores correlated in the expected manner with existing but longer symptom-specific questionnaires suggesting good convergent validity for the COMI. The Brazilian-Portuguese COMI represents a valuable tool for Brazilian study-centres in future multicentre clinical studies and surgical registries.

Acto de presentación del libro "Siguiendo el rastro del arquitecto " en la Biblioteca de Arquitectura de la ULPGC

Evento celebrado el 30 de abril de 2010 que consistió en la presentación del libro "Siguiendo el rastro del arquitecto", a cargo de D. Héctor López Campos por la Biblioteca de Arquitectura, D. Eduardo Cáceres Morales por el Departamento de Arte, Ciudad y Territorio, D. Francisco Ortega Andrade por el Departamento de Construcción Arquitectónica, D. Alberto Bravo de Laguna Socorro por el Departamento de Expresión Gráfica y Proyectos Arquitectónicos y D. Enrique Solana Suárez como Director de la Escuela de Arquitectura. A continuación tuvo lugar el reconocimiento a la labor de Dña. Delia López Martín como bibliotecaria de Arquitectura con la participación del personal de la Biblioteca y posteriormente una intervención musical a cargo de Jonás García (guitarra) y Beneharo Déniz (flauta) que interpretaron el Concierto para flauta y guitarra de Astor Piazzola "Historia del tango". El acto fue presidido por D. José Regidor García, Rector de la Universidad de Las Palmas de Gran Canaria.

Vida y obra del artista canario Carlos Morón

[ES] El presente trabajo de investigación responde a la demanda social de revitalizar y dar a conocer a las generaciones actuales la polifacética personalidad artística de Carlos Morón. Para ello, se pensó que lo más conveniente era la realización de un trabajo monográfico sobre su peculiar biografía y heterogénea obra que abarcó el retrato, la pintura mural, la de historia, el paisaje, bodegones, costumbrista, escenografía, escultura y el grabado.