104 research outputs found

    Changes in bacterial number at different sites of oral cavity during perioperative oral care management in gastrointestinal cancer patients: preliminary study

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    Objective: The objective of this study was to clarify differences in bacterial accumulation between gastrointestinal cancer patients who underwent severely invasive surgery and those who underwent minimally invasive surgery. Material and Methods: We performed a preliminary investigation of gastrointestinal cancer patients who were treated at the Department of Surgery, Takarazuka Municipal Hospital, from 2015 to 2017 (n=71; 42 laparoscopic surgery, 29 open surgery) to determine changes in bacterial numbers at different sites of the oral cavity (tongue dorsum, gingiva of upper anterior teeth, palatoglossal arch), as well as mouth dryness and tongue coating indices. Specifically, patients received professional tooth cleaning (PTC), scaling, tongue cleaning, and self-care instruction regarding tooth brushing from a dental hygienist a day before the operation. Professional oral health care was also performed by a dental hygienist two and seven days after surgery. Oral bacteria numbers were determined using a bacterial counter with a dielectrophoretic impedance measurement method. Results: The number of bacteria at all three examined sites were significantly higher in the open surgery group when compared to the laparoscopic surgery group on the second postoperative day. Relevantly, bacterial count in samples from the gingiva of the upper anterior teeth remained greater seven days after the operation in patients who underwent open surgery. Furthermore, the dry mouth index level was higher in the open surgery group when compared to the laparoscopic surgery group on postoperative days 2 and 7. Conclusions: Even with regular oral health care, bacterial numbers remained high in the upper incisor tooth gingiva in gastrointestinal cancer patients who received open surgery. Additional procedures are likely needed to effectively reduce the number of bacteria in the gingival area associated with the upper anterior teet

    Simultaneous Evaluation of Three-Dimensional Lip Kinetics and Tongue Pressure during Swallowing

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    Objectives: The purpose of this study was to evaluate the amount of lip movement and simultaneous tongue pressure changes on an artificial palatal plate during swallowing. Methods: Subjects were 9 healthy males (25.4 ± 2.1 years of age). Three-dimensional lip movement was measured by a wireless optoelectronic system, and tongue pressure was simultaneously recorded by a sensor sheet attached to the incisive papilla of an artificial palatal plate. Reflective markers were attached to the right and left corners of the mouth to measure the distance between them. All subjects were instructed to swallow 5 mL and 20 mL samples of water at will. The maximum change of distance between the corners of mouth, the maximum tongue pressure, and the time interval between the two maxima (lip-tongue interval) were calculated. Wilcoxon’s test was used to detect significant differences in these measurements between the two volumes. Results: Maximum tongue pressure did not differ significantly between swallowed volumes. The maximum change of distance between the corners of mouth was larger and the lip-tongue interval was significantly shorter with the larger volume. Conclusions: We suggest that swallowing a larger volume is accomplished by larger lip movement rather than larger tongue movement. These results indicate that lip movement during swallowing can be evaluated objectively

    Relationships between nasal resistance, adenoids, tonsils, and tongue posture and maxillofacial form in Class II and Class III children

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    Introduction: The purpose of this study was to clarify the relationships between upper airway factors (nasal resistance, adenoids, tonsils and tongue posture) and maxillofacial form in Class II and III children Methods: Sixty-four subjects (mean age, 9.3 years) with malocclusion were divided into Class II and Class III groups by ANB angle. Nasal resistance was calculated using computational fluid dynamics from cone-beam computed tomography (CBCT) data. Adenoids, tonsils and tongue posture were evaluated in CBCT images. The groups were compared using Mann-Whitney U-tests and Student t-tests. Spearman’s rank test assessed the relationships between upper airway factors and maxillofacial form. Results: Nasal resistance of the Class II group was significantly larger than that of the Class III group (P = 0.005). Nasal resistance of the Class II group was significantly correlated with inferior tongue posture (P < 0.001), and negatively correlated with intermolar width (P = 0.028). Tonsil size of the Class III group was significantly correlated with anterior tongue posture (P < 0.001) and mandibular incisor anterior position (P = 0.007). Anterior tongue posture of the Class III group was significantly correlated with mandibular protrusion. Conclusions: The relationships of upper airway factors differed between Class II and Class III children


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    This study presents the current state of research of freshwater fishes' parasites in Brazil, exploring the watersheds requiring further studies. The articles used were obtained through searching the databases ISI and SciELO, as well as direct search in the Curricula Vitae of researchers in this area. The survey was conducted during the month of March 2012 and 685 articles were obtained. The most studied group was Monogenea. Taxonomy was the most common studied subject. The most reported river basin is the Amazon region and the region of Parana. The largest concentration of periodic articles was Memorias do Instituto Oswaldo Cruz. Most articles were published in journals with Qualis B1 and B2 and without impact factor. More than half of the articles were found in the Curriculum of researchers. It is believed that this information will contribute to the knowledge of the available literature on this subject, offering subsidies to agencies that support research in the country and identifying geographical sampling gaps. Moreover, it allows the design of future biogeographic and ecological studies in order to assist in understanding the patterns of biological diversity of several groups of parasites in Brazil.Este estudio presenta la situación de la investigación de parásitos de peces de agua dulce en Brasil, indicando las cuencas hidrográficas y las áreas que requieren más estudios. Los artículos utilizados fueron obtenidos a través de búsquedas en las bases de datos ISI y SciELO, así como en el Curriculum Vitae de los investigadores en esta área. La búsqueda fue conducida durante el mes de Marzo 2012 y 685 artículos fueron obtenidos. El grupo más estudiado fue Monogenea y taxonomía fue el tema más estudiado. Con respecto a la cuenca del río más estudiados destacan la región amazónica y la región de Paraná. La mayor concentración de artículos fue en el periódico Memorias del Instituto Oswaldo Cruz. La mayoría de los artículos fueron publicados en revistas con Qualis B1 y B2 y sin factor de impacto. Más de la mitad de los artículos fueron encontrados en la hoja de vida de los investigadores. Creemos que esta información contribuirá al conocimiento de la literatura disponible sobre el tema, que ofrece subsidios a las agencias que apoyan la investigación en el país y a la identificación de brechas de muestreo geográficas. Además, permite el diseño de futuros estudios biogeográficos y ecológicos con el fin de ayudar en la comprensión de los patrones de diversidad biológica de varios grupos de parásitos en Brasil


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    Objective: To evaluate the effect of a Herbst appliance on ventilation of the pharyngeal airway (PA) using computational fluid dynamics (CFD). Materials and Methods: Twenty-one Class II patients (10 boys; mean age, 11.7 years) who required Herbst therapy with edgewise treatment underwent cone-beam computed tomography (CBCT) before and after treatment. Nineteen Class I control patients (8 boys; mean age, 11.9 years) received edgewise treatment alone. The pressure and velocity of the PA were compared between the groups using CFD based on three-dimensional CBCT images of the PA. Results: The change in oropharyngeal airway velocity in the Herbst group (1.95 m/s) was significantly larger than that in the control group (0.67 m/s). Similarly, the decrease in laryngopharyngeal airway velocity in the Herbst group (1.37 m/s) was significantly larger than that in the control group (0.57 m/s). Conclusion: The Herbst appliance improves ventilation of the oropharyngeal and laryngopharyngeal airways. These results may provide a useful assessment of obstructive sleep apnea treatment during growth

    Hardware-Oriented Algorithm for Human Detection using GMM-MRCoHOG Features

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    In this research, we focus on Gaussian mixture model-multiresolution co-occurrence histograms of oriented gradients (GMM-MRCoHOG) features using luminance gradients in images and propose a hardware-oriented algorithm of GMM-MRCoHOG to implement it on a field programmable gate array (FPGA). The proposed method simplifies the calculation of luminance gradients, which is a high-cost operation in the conventional algorithm, by using lookup tables to reduce the circuit size. We also designed a human-detection digital architecture of the proposed algorithm for FPGA implementation using high-level synthesis. The verification results showed that the processing speed of the proposed architecture was approximately 123 times faster than that of the FPGA implementation of VGG-16.17th International Joint Conference on Computer Vision Theory and Applications (VISAPP 2022), February 6-8, 2022, Online Streamin
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