Artículos de Investigación

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    Item type:Publication,
    Description of intraoral pressures on sub-palatal space in young adult patients with normal occlusion
    (2015)
    Fuentes, Ramón
    ;
    Engelke, Wilfried
    ;
    Flores, Tania
    ;
    Navarro, Pablo
    ;
    Borie, Eduardo
    Under normal conditions, the oral cavity presents a perfect system of equilibrium between teeth, soft tissues and tongue. The equilibrium of soft tissues forms a closed capsular matrix, generating differences with the atmospheric environment. This difference is known as intraoral pressure. Negative intraoral pressure is fundamental to the stabilization of the soft palate and tongue, reducing neuromuscular activity for the permeability of the respiratory tract. Thus, the aim of this study was to describe the variations of intraoral pressure of the sub-palatal space (SPS) under different physiological conditions and biofunctional phases. A case series was conducted with 20 individuals aged between 18 and 25. The intraoral pressures were measured through a system of cannulae connected to a digital pressure meter in the SPS during seven biofunctional phases. Descriptive statistics were used based on the mean and standard deviation. The data recorded pressure variations under physiological conditions, reaching 65 mbar as the intraoral peak in forced inspiration. In the swallowing phase, peaks reached -91.9 mbar. No pressure variations were recorded in terms of atmospheric changes with the mouth open and semi-open. The data obtained during the swallowing and forced inspiration phases indicated forced lingual activity. In the swallowing phase, the adequate position of the tongue creates negative intraoral pressure, which represents a fundamental mechanism for the physical stabilization of the soft palate. This information could contribute to subsequent research into the treatment of primary roncopathies.
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    Evaluación de la Fuerza Masticatoria Máxima Funcional en Adultos Jóvenes Chilenos
    (2015)
    Curiqueo, Aldo
    ;
    Pinto-Salamanca, Carlos-Eduardo
    ;
    Borie, Eduardo
    ;
    Navarro, Pablo
    ;
    Fuentes, Ramón
    La fuerza masticatoria m xima funcional (FMMF) se ha definido como la m xima fuerza generada entre los dientes maxilares y mandibulares. As el objetivo de esta investigaci n fue de obtener datos reales sobre las FMMF a nivel molar, premolar, canino e incisivo en individuos adultos j venes. El estudio incluy una muestra de 50 individuos entre 18 y 25 a os de edad, totalmente dentados y con perfil esqueletal tipo I y clase I molar y canino. Se utiliz como instrumento un dispositivo de medici n de fuerzas port til, realizando las medidas en la regi n molar, premolar, canina e incisiva. A los individuos se les indic morder el instrumento con la mayor fuerza posible, alternando las diferentes zonas a medir, aplic ndose tres mediciones en cada diente y registrando el mayor valor en cada zona. La media de las fuerzas ejercidas del sexo masculino fue de 698, 516, 322 y 220 N, en las regiones molar, premolar, canina e incisiva, respectivamente. Por otro lado, en el sexo femenino se observaron valores medios de 466, 431, 232 y 174 N en las regiones molar, premolar, canina e incisiva, respectivamente. Se puede concluir que se observaron diferencias significativas de FMMF entre ambos sexos en las diferentes regiones, identificando los mayores valores en los individuos de sexo masculino en la regi n molar. Adem s, se identificaron diferencias significativas de la FMMF s lo en la regi n canina del sexo masculino al relacionarlas con el lado del arco.