Mechanical Behavior of Five Different Morse Taper Implants and Abutments with Different Conical Internal Connections and Angles: An In Vitro Experimental Study.

The present study evaluated the mechanical behavior of five designs of Morse taper (MT) connections with and without the application of loads. For this, the detorque of the fixing screw and the traction force required to disconnect the abutment from the implant were assessed. A total of 100 sets of implants/abutments (IAs) with MT-type connections were used, comprising five groups (n = 20/group): (1) Group Imp 11.5: IA sets with a cone angulation of 11.5°; (2) Group SIN 11.5: with a cone angulation of 11.5°; (3) Group SIN 16: with a cone angulation of 16°; (4) Group Neo 16: with a cone angulation of 16°; and (5) Group Str 15: with a cone angulation of 15°. All sets received the torque recommended by the manufacturer. After applying the torque, the counter torque of the fixing screws was measured in ten IA sets of each group without the application of cyclic loads (frequencies ≤ 2 Hz, 360,000 cycles, and force at 150 Ncm). The other ten sets of each group were subjected to cyclic loads, after which the detorque was measured. Afterwards, the force for disconnection between the implant and the abutment was measured by traction on all the samples. The untwisting of the abutment fixation screws showed a decrease in relation to the initial torque applied in all groups. In the unloaded samples, it was found to be -25.7% in Group 1, -30.4% in Group 2, -36.8% in Group 3, -29.6% in Group 4, and -25.7% in Group 5. After the applied loads, it was found to be -44% in Group 1, -43.5% in Group 2, -48.5% in Group 3, -47.2% in Group 4, and -49.8% in Group 5. The values for the IA sets were zero for SIN 16 (Group 3) and Neo16 (Group 4), both without and with loads. In the other three groups, without loads, the disconnection value was 56.3 ± 2.21 N (Group 1), 30.7 ± 2.00 N (Group 2), and 26.0 ± 2.52 N (Group 5). After applying loads, the values were 63.5 ± 3.06 N for Group 1, 34.2 ± 2.45 N in Group 2, and 23.1 ± 1.29 N in Group 5. It was concluded that in terms of the mechanical behavior of the five designs of MT IA sets, with and without the application of loads, the Imp 11.5, SIN 11.5, and Srt 15 groups showed better results compared to the SIN 16 and Neo 16 groups, showing that lower values of cone angulation increase the friction between the parts (IA), thus avoiding the need to maintain the torque of the fixing screw to maintain the union of the sets.

Ideology, sexism, and beliefs about sexual violence in Peruvian university students and future police officers

Abstract The main objective of the present study is to establish a comparison between ideology (RWA and SDO), ambivalent sexism and beliefs about sexual violence, in a sample of Peruvian trainee from a police officer school (n = 81) and university students (n = 196). In addition, as a specific objective, it seeks to explore the relationships between the mentioned variables. The results showed significant differences between the groups at the level of the RWA (Right Wing Authoritarianism) ideological variable and the Subordination of women dimension of the Beliefs about Sexual Violence variable. Likewise, the structural model shows that the variables RWA and SDO (Social Dominance Orientation) have an impact on the dimensions of beliefs about sexual violence: Attribution of blame to women, Subordination of women and Exaggeration of women, having as mediators Benevolent and Hostile Sexism. The results show that beliefs about sexual violence in the sample of this study link to sexism and these, in turn, to ideology; however, the routes in which these beliefs are configured vary between police trainee and university students. Higher levels of RWA are observed in police trainee, an ideological indicator that, in this sample, paradoxically tends to be inversely related to sexism and beliefs about sexual violence against women that blame and subordinate them. Regarding the path of social dominance, this also directly relates to both expressions of benevolent and hostile sexism, although with greater predominance with the second, appealing to sex as a structural element on which this ideological component is established.

Resumen El presente estudio tiene como objetivo principal establecer una comparación entre la ideología (RWA y SDO), el sexismo ambivalente y las creencias sobre la violencia sexual, en una muestra de cadetes de una escuela de oficiales (n=81) y estudiantes universitarios (n=196). Además, como objetivo específico, busca explorar las relaciones entre dichas variables. Los resultados demostraron diferencias significativas entre los grupos a nivel de la variable ideológica RWA (Right Wing. Authoritarianism) y la dimensión Subordinación de la mujer de la variable Creencias sobre la Violencia Sexual. Asimismo, el modelo estructural evidencia que las variables RWA y SDO (Social Dominance Orientation) afectan las dimensiones de creencias sobre la violencia sexual: Atribución de la culpa a la mujer, Subordinación de la mujer y Exageración de la mujer teniendo como mediadores al Sexismo Benevolente y Hostil. Los resultados muestran que las creencias sobre violencia sexual en la muestra están vinculadas al sexismo y estas, a la ideología también; sin embargo, los recorridos en que estas creencias se configuran varían entre estudiantes de policía y estudiantes universitarios. En estudiantes de policía se observan niveles más altos de RWA, indicador ideológico que, en esta muestra, paradójicamente tiende a estar inversamente relacionado con el sexismo y creencias sobre la violencia sexual contra las mujeres que las culpan y subordinan. En cuanto al camino del SDO, también está directamente relacionado con expresiones de sexismo benevolente y hostil, aunque con mayor predominio con el segundo, apelando al sexo como elemento estructural sobre el que se establece este componente ideológico.

Obesidad, actividad e inactividad física en adolescentes de Morelos, México: un estudio longitudinal / Obesity, physical activity and inactivity among adolescents in Morelos, Mexico: a longitudinal study

La prevalencia de obesidad durante la niñez y adolescencia se ha incrementado en México, pudiendo explicarse por un decremento en la actividad física. Nuestro objetivo fue determinar la asociación entre la prevalencia de obesidad o sobrepeso con niveles de actividad e inactividad física en adolescentes mexicanos. Se utilizó información de 446 adolescentes de entre 12 y 17 años, que acudían a escuelas públicas secundarias en Cuernavaca, Morelos, México. Se empleó un diseño longitudinal con 2 mediciones, basal y final. Se captó información antropométrica, actividad e inactividad física, edad y sexo. Se calculó la prevalencia de obesidad o sobrepeso de acuerdo al criterio propuesto por el International Obesity Task Force, y se estimaron razones de momios o posibilidades mediante regresión logística. La prevalencia basal de obesidad o sobrepeso fue de 37.21% (42.99% para hombres y 30.95% para mujeres) y la final de 35.50% (38.46% para hombres y 32.28% para mujeres). La media final de tiempo total viendo TV fue de 3.90 h/d, de actividad vigorosa 0.73 h/d y de moderada 0.58 h/d. Ajustando el efecto de obesidad o sobrepeso inicial, sexo y escuela, no se encontraron asociaciones significativas entre tiempo viendo televisión o practicando actividad física con la prevalencia de obesidad o sobrepeso. Al incluir un término de interacción por sexo en nuestros modelos se encontró un efecto protector de la actividad vigorosa en los adolescentes varones (b=0.22, IC 95% (0.05, 0.89)). Los resultados sugieren que la actividad física vigorosa disminuye el riesgo de obesidad o sobrepeso en adolescentes varones.

The prevalence of obesity in childhood and adolescence has increased in Mexico. This increase can be explained partly by a decrease in physical activity. The objective of this study was to assess the association between the prevalence of obesity and overweight with physical activity and inactivity among Mexican adolescents. We analyzed data from a longitudinal study with baseline and follow-up measures in 446 adolescents 12 to 17 years old, attending public schools in Cuernavaca, Morelos, Mexico. We collected information on weight, physical activity and demographic characteristics. Obesity and overweight were determined using as indicador the body mass index, and the cutoff points proposed by the International Obesity Task Force. The baseline prevalence of obesity or overweight was 37.22% (42.99% for males and 30.95% for females), and in the final measure 34.30% (38.46 % for males and 32.28% for females). The median time of TV viewing was 3.90 h/d, with 0.73 h/d dedicated to vigorous physical activity and 0.58 h/d to moderate physical activity. Using logistic regression, after adjustment for obesity in the baseline measure, sex and clustering by school, we found no significant associations between the prevalence of obesity or overweight with time dedicated to TV viewing, vigorous or moderate physical activity. However, when conducting the analysis with an interaction term by sex, we found significantly lower risk of obesity or overweight associated with an increase in vigorous physical activity among males only (b=0.22, 95% CI (0.05, 0.89). Results suggest that vigorous physical activity may reduce the risk of obesity or overweight among male adolescents.

[Obesity, physical activity and inactivity among adolescents in Morelos, Mexico: a longitudinal study]. / Obesidad, actividad e inactividad física en adolescentes de Morelos, Mexico: un estudio longitudinal.

The prevalence of obesity in childhood and adolescence has increased in Mexico. This increase can be explained partly by a decrease in physical activity. The objective of this study was to assess the association between the prevalence of obesity and overweight with physical activity and inactivity among Mexican adolescents. We analyzed data from a longitudinal study with baseline and follow-up measures in 446 adolescents 12 to 17 years old, attending public schools in Cuernavaca, Morelos, Mexico. We collected information on weight, physical activity and demographic characteristics. Obesity and overweight were determined using as indicador the body mass index, and the cutoff points proposed by the International Obesity Task Force. The baseline prevalence of obesity or overweight was 37.22% (42.99% for males and 30.95% for females), and in the final measure 34.30% (38.46% for males and 32.28% for females). The median time of TV viewing was 3.90 h/d, with 0.73 h/d dedicated to vigorous physical activity and 0.58 h/d to moderate physical activity. Using logistic regression, after adjustment for obesity in the baseline measure, sex and clustering by school, we found no significant associations between the prevalence of obesity or overweight with time dedicated to TV viewing, vigorous or moderate physical activity. However, when conducting the analysis with an interaction term by sex, we found significantly lower risk of obesity or overweight associated with an increase in vigorous physical activity among males only (beta = 0.22, 95% CI (0.05, 0.89). Results suggest that vigorous physical activity may reduce the risk of obesity or overweight among male adolescents.

Percepción de calidad de atención en las usuarias del programa de planificación familiar, Centro de Salud de usupun, Municipio de Puerto Lempira, Gracias a Dios Honduras, julio 2004

Trata sobre la perscepción de calidad de atención en la susuarias del programa de planificación familiar del Centro de Salud de Usupun, municipio de Puerto Lempira, departamento de Gracias a Dios, Honduras.