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1.
Rev. estomatol. Hered ; 26(1): 28-36, ene.-mar.2016. ilus, tab
Artigo em Espanhol | LILACS, LIPECS | ID: lil-786456

RESUMO

Evaluar mediante el uso de la tomografía cone beam, la prevalencia, bilateralidad y características del sistema de conducto en C en las segundas molares mandibulares de pacientes que acudieron al Servicio de Radiología oral y maxilofacial de la Universidad Peruana Cayetano Heredia 2011-2013. Material y métodos: Fueron evaluadas 227 segundas molares mandibulares. Se determinó la prevalencia y la bilateralidad de conductos en forma de C de acuerdo al sexo y a la ubicación de la pieza dentaria y analizada con la prueba de Chi-cuadrado. La forma del conducto en C se categorizó en base a la clasificación de Melton. Resultados: La prevalencia de conductos en forma de C fue 40,5%, esta prevalencia no difiere con relación a la ubicación de la pieza dentaria. La forma del conducto en C a nivel de los tercios radiculares coronal y medio fue más frecuente para el tipo III y en apical para el tipo I. La prevalencia de la bilateralidad fue 76,6%. La mayoría (66,3%) de las segundas molares mandibulares con conductos en C, tenía orificios del conducto separado y el 33,7% orificios en forma de C completa. Conclusiones: La prevalencia y bilateralidad de conductos en forma de C son altas. La mayoría de los conductos en C va cambiando su forma a lo largo de la raíz...


Objectives: To evaluate, using cone beam tomography, prevalence, bilateral and features of C-shaped root canal system in mandibular second molars of patients attending the department of oral and maxillofacial radiology at the Universidad Peruana Cayetano Heredia 2011- 2013. Material and methods: 227 seconds mandibular molars were evaluated. The prevalence and bilateral nature of the C-shaped root canal according to sex and location of the tooth were determined and analyzed with Chi-square test. The shape of the C canal are categorized based on the classification of Melton. Results: The prevalence of C-shaped canals was 40.5%, this prevalence is no different with respect to the location of the tooth. The shape of the C canal in the coronal and middle thirds was more common for type III and type I in the apical thirds. The bilateral prevalence was 76.6%. The majority (66.3%) of the second mandibular molars with C-shaped canals, had separated holes and 33.7% had complete C-shaped holes. Conclusions: The prevalence and bilateral of C-shaped canals is high. Most C-shaped canals change its shape along the root...


Assuntos
Humanos , Cavidade Pulpar , Dente Molar , Tomografia Computadorizada de Feixe Cônico , Estudo Observacional , Estudos Retrospectivos , Estudos Transversais
2.
Univ. psychol ; 10(3): 657-668, sep. 2011. tab
Artigo em Inglês | LILACS-Express | LILACS | ID: lil-650097

RESUMO

This study aimed to clarify the validity of the short scale of Transformational Leadership used by the Human System Audit (short HSA-TFL). The need of today's enterprises for combined assessment of transformational leadership and quality-related performance in wider contexts requires short instruments based on scientific research. Convergent, construct and criterion validity of the short HSA-TFL were analyzed. Comparison of the short HSA-TFL with the Multifactor Leadership Questionnaire (MLQ-5X) showed high convergent validity. Exploratory factor analysis with hospital workers in Spain (N = 625) showed the single factor structure of the Spanish version of the HSA-TFL. Confirmatory factor analysis using three further samples of hospital workers (N = 776) from different european countries confirmed a single factor. As regards criterion validity, the results indicated that the short HSA-TFL is positively related in all four countries to subjective performance. In sum, the results provide empirical evidence for the validity of the short HSA-TFL scale.


La necesidad de las empresas de evaluar el liderazgo transformacional en un contexto amplio y combinado con rendimiento de calidad, requiere instrumentos cortos y, al mismo tiempo, basados en evidencia científica. El objetivo de este estudio fue analizar la validez (convergente, de constructo y de criterio) de la escala corta del Liderazgo Transformacional, usada por la Auditoria del Sistema Humano (short HSA-TFL). La comparación con el Multifactor Leadership Questionnaire (MLQ-5X) aportó valores de alta validez convergente. El análisis factorial exploratorio con empleados del sector sanitario en España (N = 625) del HSA-TFL, sugiere una estructura unifactorial, que fue confirmada mediante análisis factorial confirmatorio, realizado con otras tres muestras de empleados del sector hospitalario de varios países europeos (N = 776). Asimismo, los resultados muestran, en los cuatro países, una relación positiva del HSA-TFL con el rendimiento subjetivo (validez de criterio). En conclusión, la versión breve del HSA-TFL es válida para el análisis del liderazgo transformacional.

3.
Rev Biol Trop ; 53 Suppl 3: 305-12, 2005 Dec.
Artigo em Espanhol | MEDLINE | ID: mdl-17469260

RESUMO

The sea urchin Lytechinus variegatus is of some commercial importance on the Southern coast of Margarita Island (Venezuela), where artisan women fishers process and sell the roe. The reproduction cycle of this species had not been fully studied. We collected these sea urchins in two stations from November 1997 through October 1998. The samples were transported fresh to the laboratory to determine weight, diameter and height. The sexual stage was established with a macroscopic scale and the gonadosomatic index (GI). Maturity is achieved when the animals reaches a diameter of 22 mm, although 50% of the population reaches sexual development at diameters of 43 mm (males) and 45 mm (females) at Station 1, and 35 mm for both sexes at Station 2. Mature individuals, in a sexual proportion of 1:1 were collected every month. According to the monthly GI variation and frequency (%) of the development stages, on the southern beaches the main reproductive period begins in April and continues through October, and it is most intensive from May to July, when gonads reach the greatest growth.


Assuntos
Lytechinus/crescimento & desenvolvimento , Comportamento Sexual Animal/fisiologia , Animais , Peso Corporal , Feminino , Masculino , Densidade Demográfica , Reprodução/fisiologia , Estações do Ano , Água do Mar , Maturidade Sexual , Venezuela
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