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  • Parto no institucional y no cumplimiento de vacunas correspondientes al primer año de vida en el Perú: un análisis a partir de la encuesta demográfica y de salud familiar (ENDES) 2014

    Maguiña Quispe, Jorge Luis; Guevara Jurado, Karol Ingrid; Zevallos Gutierrez, Erika del Pilar (Universidad Peruana de Ciencias Aplicadas (UPC), 2018-03-22)
    Objective: To evaluate the association between non-institutional delivery and incomplete vaccine program during the first year of age in Peru. Materials and Methods: A secondary cross-sectional analysis of the 2014 National Demographic and Health Survey was performed. The outcome variable was incomplete vaccine program, defined as the absence of at least one vaccine during the first year of life according to the vaccine schedule of “Ministerio de Salud”. The exposure variable was non institutional delivery, which included home of the interviewee and midwife, community center, church and private physician's office. Poisson regression was the generalized linear model controlling the multistage study design and potential confounders. It was used to estimate Prevalence Ratio (PR). Results: A total of 6837 women were included in the analysis. The prevalence of incomplete vaccine programs was 52.24% (CI 95% 50.57 – 53.91). Women who reported non-institutional delivery were more likely to have children with incomplete vaccine schedule, PR(c) 1.43 (CI 95% 1.34 – 1.53) and PR(a) 1.61 (CI 95% 1.50 – 1.73). Conclusions: Peruvians women with non-institutional delivery was associated with not comply of vaccine program during the first year of age. These findings can provide strategies to improve vaccine program.
  • Frecuencia y factores asociados a viremia intermitente en personas viviendo con VIH/SIDA en el programa de un hospital de Lima, Perú

    Benites Zapata, Vicente A.; Pinto Dongo, Claudia Estefany (Universidad Peruana de Ciencias Aplicadas (UPC), 2018-03-31)
    Objectives: To identify the factors associated with intermittent viremia in PLWHA who entered the HIV / AIDS program of the Edgardo Rebagliati Martins National Hospital between 2010 and 2014. Materials and methods: A secondary analysis of a database of PLWHA assisted the National Hospital Edgardo Rebagliati Martins; calculated considering that the base has 520 participants in TARGA, a frequency of intermittent viremia in patients on treatment with a protease inhibitor base of 48%. In this study it was not necessary to use an instrument, since it is based on a secondary basis. Results: When performing the statistical analysis of the variables, no association was found. The participants who had co-infection with tuberculosis were 46, representing 8.8%; and received prophylaxis with CMX 226 (43.5%) participants. The participants who presented an intermittent viremia were 37, representing an incidence of 7.12%. Conclusions: No factor associated with the variable intermittent viremia was found. The identification of associated factors would have been important to reduce the transmission of HIV and the development of resistance to TARGA.
  • Estimación del contenido de polifenoles y capacidad antioxidante del café arábiga (Coffea arabica) orgánico y convencional en el proceso de elaboración de yogur aromatizado con café

    Ramos Escudero, Fernando; Camacho Carrillo, Andrea Daniela; Merino Gamboa, Maria Gabriela (Universidad Peruana de Ciencias Aplicadas (UPC), 2018-02-12)
    Objetivo: Estimar el contenido de polifenoles y la capacidad antioxidante y del café arábiga (Coffea arabica) orgánico y convencional en el proceso de elaboración de yogur aromatizado con café. Metodología: Fue un estudio de tipo observacional comparativo, transversal. El análisis y preparación de todas las muestras, pasado de café, confitura tipo jalea de café y yogur aromatizado con café, se realizaron en los laboratorios de la Universidad Peruana de Ciencias Aplicadas. La primera fase para la elaboración del producto fue el filtrado del café en donde se utilizaron dos tipos: café arábiga orgánico y café arábiga convencional; la siguiente fase fue la preparación de la confitura tipo jalea de café de ambos tipos, luego la preparación del yogur natural elaborado con cepas probióticas (S. salivarius subsp thermophilus, L. delbrueckii subsp bulgaricus, L. acidophilus, Bifidobacterium spp) y la última fase fue la mezcla de la confitura tipo jalea de café con el yogur natural en concentraciones de 15%, 19% y 23%. Se practicaron análisis para determinar las características fisicoquímicas del producto final: pH, acidez(%), humedad(%), capacidad de retención de agua (%WHC) y sinéresis (%STS). Resultados: El contenido de polifenoles y la capacidad antioxidante es directamente proporcional con la concentración de confitura de café que posee el yogur aromatizado con café. Conclusiones: El café pasado, la confitura tipo jalea de café y el yogur aromatizado con café en su versión convencional presentó mayor contenido de polifenoles y capacidad antioxidante que la versión orgánica. El yogur aromatizado con café orgánico al 23% fue el preferido por los consumidores en la evaluación sensorial.
  • Relación entre los niveles de hemoglobina en una población infantil de 9 a 36 meses de edad y el conocimiento sobre el uso de los micronutrientes en polvo de las madres en una población periurbana en Lima durante el 2017

    Segura Paucar, Eddy Roberto; Rodríguez Mier y Terán, Luz Marina; Zambrano Pino, Lorena Guadalupe (Universidad Peruana de Ciencias Aplicadas (UPC), 2018-03-02)
    Introduction: Knowledge about the use of micronutrients in powder (MNP) is fundamental for its proper use of them and thus achieves the increase of hemoglobin levels in your child. Objective: To evaluate the association between the knowledge of the use of MNP by mothers and the hemoglobin levels of their children between 9 and 36 months of age in a peri - urban area of Lima, Peru during 2017. Materials and methods: Analytical cross-sectional study. It was carried out in mothers and their children between the ages of 9 and 36 months that attended the Health Post of Oasis de Villa, Villa El Salvador. We evaluated the knowledge of the use of the MNPs of the mothers by a survey and we measured the level of hemoglobin of the minor with a hemoglobinometer. The knowledge of the use was classified as “high, regular and low” and the hemoglobin was classified according to the MINSA cut-off points in anemia or non- anemia. Analytical statistics, generalized linear models, with Poisson family, log link function and robust variances were used. Results: We surveyed 340 mothers and we screened the hemoglobin of their children. The mean hemoglobin was 11,9 g/dL with a standard deviation of 0,9. There were 130 children with anemia. We found that 54.7% of the mothers had a low level of knowledge of the use and their children were anemic. We found an association between levels of knowledge of the use and hemoglobin levels. There was 96% higher frequency of anemic children in mothers with low knowledge of the use (RPa: 1,96; 95% CI: 1,41-2,72; p<0,001). Conclusions: Knowledge of use influences hemoglobin levels. There are other factors that can influence the final results and for this, new studies are suggested to explore these assumptions.
  • Evaluación de la eficacia antimicrobianas de tres soluciones como protocolo para la limpieza y desinfección de los cepillos dentales

    Casas Apayco, Leslie Caroll; Paredes Rivera, Ruth del Rosario (Universidad Peruana de Ciencias Aplicadas (UPC), 2018-01-16)
    Objective: The purpose of this study was to evaluate the antibacterial efficacy of three solutions (Colgate Plax ®, Dento Aliento Fresco ® y Perioagar ®) as protocol for cleaning and disinfection of selected. Every participant used an antimicrobial solution on the toothbrushes for a period of seven days, in a total of 4 weeks in the following order: week 1 sterile water, week 2 Colgate Plax ®, week 3 Dento Aliento Fresco ® and week 4 Perioagar ®; Each volunteer received a spray with the antimicrobial solution, a toothbrush, a toothpaste, and a infographic paper with instruction on how touse the spray. Every seven days the samples were collected and taken to the laboratory for microbiologic procedures. After that, colonies units forming were counted. Results: In the case of Colgate Plax ® and Periogard ® bacterial load decreases in 61.5% and 57.7% of cases respectively. While for Dento Aliento Fresco ® bacteria decreases in 23.1% of the cases. The average colonies per plate was 217.44 UFC (16/26 cases), 5.2 UFC (15/26 cases) and 151.7 UFC (6/26 cases) to Colgate Plax ® mouthwashes, Perio- Aid ® and Dento Breath Fresco ® respectively Conclusions: Chlorhexidine 0.12% (Perioagar ®) had the lowest average of colonies per plate compared to the other two tested solutions.toothbrushes. Materials and Methods: The study was a crossover where 26 people were randomly.
  • Comparación In Vitro de la resistencia a la tensión diametral de dos resinas tipo Bulk Fill Aura® (SDI) Y Tetric-N-Ceram® (Ivoclar Vivadent) sometidas a dos bebidas energizantes Red Bull® Y Volt

    Hermoza Novoa, Mónica; Delgado Navarro, Betsabé Kelly (Universidad Peruana de Ciencias Aplicadas (UPC), 2018-03-15)
    Objective: Compare in vitro diametral tensile strength of two Bulk Fill Aura® (SDI) and Tetric-N-Ceram® type resins subjected to two Red Bull® and Volt energy drinks. Materials and methods: The study was experimental in vitro. 132 Bulk Fill type resin bodies were evaluated, which were divided into six groups of 22 resin bodies each. Groups 1, 2 and 3 were made with Aura® resin (SDI) and groups 4, 5 and 6 with Tetric-N-Ceram® resin. Groups 1 and 4 were submerged in the Red Bull® energy drink and groups 2 and 5 in the Volt energy drink for 10 min / 1 time a day for 7 days. On the other hand, groups 3 and 6 were control groups, only immersed in distilled water for 7 days. The diametral tensile strength was evaluated through the Instron® universal test machine (speed 0.5mm / min - load 100 KN), measured in MPa. To evaluate the results of each of the variables and perform the univariate analysis, we proceeded to obtain measures of central tendency and measures of dispersion. To evaluate the bivariate analysis, the Kruskal Wallis test was carried out. Results: The control group of the Aura® resin presented a mean and a S.D of 46.51 + 3.14, while the control group of the Tetric-N-Ceram® resin presented 46.04 + 3.22. It was found that the Aura® resin when submerged in Red Bull® presented an average and a S.D of 35.58 + 7.63, while when submerged in Volt, it presented 35.24 + 5.13. On the other hand, the Tetric-N-Ceram® resin after being submerged in the Red Bull® presented a mean and a S.D of 37.46 + 6.18, while when submerged in Volt it presented 36.15 + 6.74. Conclusions: There are no statistically significant differences when evaluating the resistance to the diametral tension strength of the Bulk Fill type resins, submitted to the Red Bull® energy drink (p = 0.796), or to Volt (p = 0.496).
  • Evaluación de la dimensión y morfología del cóndilo mandibular en pacientes peruanos con el patrón esquelético clase I utilizando tomografías Cone Beam

    Ghersi Miranda, Hugo Dante; Caballero García, Carmen Stefany; Bustamante Flores, Carmen Rosa; Labrin Valdiviezo, Vanessa Milagros (Universidad Peruana de Ciencias Aplicadas (UPC), 2018-02-27)
    Objective: To evaluate the dimension and morphology of the mandibular condyle with the Class I skeletal pattern using Cone Beam tomography in patients aged 18 to over during the period 2016-2017. Materials and methods: We evaluated 71 tomographies from a diagnostic imaging center in the city of Lima, Peru. The antero-posterior diameter (A-P) and the medial-lateral diameter (M-L) in mm were evaluated. The coronal and sagittal plane morphology was also evaluated. Results: Measurements of the anterior-posterior diameter of the right condyle has a mean of 8.72 mm ± 1.25 and the left a mean of 8.50 mm ± 1.50. The medial - lateral diameter of the right condyle has a mean of 19.24 mm ± 2.03 and the left diameter has a mean of 18.97 mm ± 1.87. The condyle morphology with the highest prevalence in the study was round. The dimension of the left condyle in the mid - lateral plane had greater length in the male sex (p> 0.05). Conclusion: The morphology with the greatest manifestation in this study was of the round type. It was shown that there is a significant difference (p <0.05) of the left condyle in the medial-lateral diameter in relation to the sex. However, we found no association between the condyle morphology and sex.
  • Comparación de la percepción de estética facial en perfiles entre alumnos, odontólogos y pacientes

    Salinas Caldas, Pedro; Caballero García, Stefany; Arce Silva, Huberto Gonzalo (Universidad Peruana de Ciencias Aplicadas (UPC), 2018-03-01)
    Objective: To compare the perception of facial aesthetics in patients, among students, patients and teachers of the UPC health center. Materials and Methods: A panel of 45 dentist, 45 dental students and 45 patients evaluated the facial aesthetics in the profile of 12 patients (3 patients for each malocclusion) using a visual analog scale (VAS) rating from 0 to 10 (from less to more attractive). Results: The results showed that for the three groups studied the most aesthetic malocclusion was the class II division 2. In addition. It was demonstrated that the student group was the strictest group and the one that rated profiles more negatively. Conclusions: The study supports the idea that the perception of aesthetic varies according to different populations. The results show class II division 2 malocclusion as the most aesthetic which differs to similar studies performed in foreign populations.
  • Comparación In Vitro de la fuerza tensional residual de una cadena elastomérica expuesta a colutorios dentales con y sin alcohol

    Córdova Berrocal, Andrés; Mendoza Trujillo, Hugo Rodrigo; Diaz Alarcon, Paola Violeta (Universidad Peruana de Ciencias Aplicadas (UPC), 2018-03-08)
    Objetivo: Comparar la fuerza tensional residual de las cadenas elastoméricas DentsplyTM GAC (NY, USA) expuestas a colutorios dentales Listerine® con alcohol y sin él. Materiales y métodos: Se utilizaron 325 cadenas elastoméricas DentsplyTM GAC grises de tramo corto (NY, USA, lote 00051188) divididas en 13 grupos: uno para la medición inicial y 12 grupos distribuidos en función de la solución que será expuesta (agua destilada, Listerine® con alcohol y Listerine® sin alcohol) y al tiempo de medición (1 hora, 1 día, 7 días y 14 días). Las cadenas se colocaron en unos jigs de acrílico que las mantenían estiradas a 23,5 mm. Se realizó la medición de la fuerza tensional de cada muestra en los periodos ya mencionados con la máquina Instron®. Resultados: Para comparar la fuerza tensional residual entre los grupos se realizaron las pruebas de Kruskal Wallis. No se encontró diferencia significativa entre las fuerzas de las cadenas de cada grupo en los controles a la hora, un día y 14 días. En la medición a los 7 días sí se encontró (p = 0,001); sin embargo, esta diferencia se le atribuía al comparar los grupos experimentales con el de control. Conclusiones: No se evidenció una diferencia estadísticamente significativa en la fuerza tensional residual de las cadenas elastoméricas entre los grupos experimentales con el grupo de control en los diferentes tiempos de medición. Lo que significa que el alcohol en los colutorios dentales no es un factor que influye negativamente en la fuerza de las cadenas elastoméricas.
  • Factores asociados a la portación de armas en adolescentes peruanos

    Alvarado Cutipa-Flores, German Felipe; Barrientos Matta, Viviana Lucía; Ugas Burranca, Deborah Ximena (Universidad Peruana de Ciencias Aplicadas (UPC), 2018-03-06)
    Objectives: To determine associated factors of weapon carrying in adolescents from Peru. Materials and Methods: Secondary analysis from the Young Lives cohort, in which round three from the older cohort was used, 640 participants were included. The outcome was measured with the question “During the last 30 days, on how many days did you carry a weapon such as a knife, machete or gun to be able to protect yourself?” Sociodemographic characteristics were also assessed. Poisson Regression with robust variance was used to compute Prevalence Ratios (PR) with 95% CI. Results: We found that 45,94% were women. The mean age for round 3 was 15 years of age. 8,12% [8,10-8,14] of the adolescents carried a weapon. In adjusted analysis, age, drug use and smoking cigarettes (p<0,05) were associated with the outcome. We did not find association with gender, socioeconomic status and being hurt by a family member. Conclusions: Age, being hurt by a family member, smoking and drug consumption were associated with weapon carrying. Further evaluations with different instruments and longitudinal designs should be performed.
  • Factores asociados a autorreporte de haber sido arrestado en jóvenes peruanos

    Alvarado Cutipa-Flores, German Felipe; Montoya Romero, Luciana Lorena (Universidad Peruana de Ciencias Aplicadas (UPC), 2018-02-24)
    Objectives: To determine the associated factors of being arrested in youth from Peru. Materials and Methods: Cross sectional analysis from the Young Lives study, in which fourth round from the older cohort was used. Independent variables were sex, age, substance use (smoking and alcohol consumption), socioeconomic status, origin, belonging to a gang, friends members of a gang, weapon carrying, physical and sexual abuse (family, boyfriend, stranger, teacher, friend, partner/spouse). Self-report of being arrested was measured with a standardized question: “Have you been arrested by the police or taken into custody for an illegal or delinquent offense?” Poisson Regression with robust variance was used to compute Prevalence Ratios (PR) with 95%. Results: We found that 54% were men. The mean age was 18.4 years. The 5, 81% (CI with 95% 5.6-6.0) reported been arrested. In adjusted analysis, having friends members of a gang and being part of a gang were associated with the outcome (p<0.05). We did not find an association with sex, age, weapon carrying, socioeconomic status, being hurt by a family member or by a boyfriend. Conclusions: Being part of a gang and having friends members of a gang were associated with self-report of being arrested. Further evaluations –with longitudinal designs-should be performed.
  • Asociación entre el riesgo de adicción de sustancias psicoactivas y la adherencia a la terapia antiretroviral de gran actividad en personas que viven con VIH en un hospital de Lima, Perú en el periodo de 2015 – 2016

    Lucchetti Rodríguez, Aldo Javier; Fiestas Saldarriaga, Fabián Alejandro; Huertas Tirado, Sheila María; Zegarra Buitrón, Elizabeth (Universidad Peruana de Ciencias Aplicadas (UPC), 2018-02-01)
    Introducción La adherencia al tratamiento es el factor más importante para lograr éxito en la terapia anti – retroviral. Sin embargo, aquella podría verse afectada por el consumo de sustancias psicoactivas. Objetivo Evaluar la asociación entre el riesgo de adicción a sustancias psicoactivas, medido por el “Alcohol, Smoking and Substance Involvement Screening Test” (ASSIST) y la adherencia a la terapia anti - retroviral de gran actividad (TARGA) medido por el “Simplified Medication Adherence Questionnaire” (SMAQ) en personas que viven con el virus de inmunodeficiencia humana (VIH). Métodos Se desarrolló un estudio transversal en el Hospital Nacional Edgardo Rebagliati Martins (HNERM). Se aplicó una ficha de datos, y las encuestas ASSIST y SMAQ. Resultados Se obtuvo un total de169 personas que viven con VIH. El sexo masculino predomino (79,3%), la mediana de edad y tiempo en TARGA fueron 43 años (IQR 35 - 50) y 63 meses (IQR 20 – 156), respectivamente. El consumo de alcohol de bajo riesgo fue más frecuente (84,6%), y se encontró un riesgo moderado a alto de tabaco (35,5%). La adherencia global al TARGA para nuestro estudio fue baja (23,1%). Los pacientes de mayor edad presentaron mayor adherencia (42,9%), con asociación significativa en el modelo regresión logística (edad ≥ 53 años) (p=0,004; OR 8,55; IC 95% 2,00 – 36,57). Conclusiones No se encontró asociación entre el riesgo de adicción a sustancias psicoactivas y adherencia al TARGA. Se encontró una baja adherencia al TARGA según el SMAQ. Además, la edad es un factor asociado positivamente a la adherencia al TARGA.
  • Asociación entre la funcionalidad de rodilla y la práctica recreativa de patinaje en línea en personas adultas de Lima, Perú

    Moscoso Porras, Miguel Giancarlo; Gonzales Lozano, Ricardo Iván; Zagaceta Bartra, Carmen Mariana; Ramírez Plasencia, Aldair Alfonso (Universidad Peruana de Ciencias Aplicadas (UPC), 2018-02-06)
    Objective: Assess the association between leisure inline skating practice and knee joint functionality in adults in Lima, Peru. Methods: This analytical cross-sectional study took place in Lima, Peru. The population involved 120 adults of both sexes who practiced leisure activities such as running, roller skating and cycling. The knee functionality has been evaluated by IKDC (International Knee Documentation Committee). In addition, the lower limb alignment was analyzed with PAS program (Postural Assessment software). Information like age, sex and activities features were analyze through surveys. For the analysis, it was used the T Test of Student for a mean difference and a Multiple Linear Regression Analysis for the confusing variable control. Results: There were 120 survey respondents between 36,1 years old. The 40,3% of the population did skating and the rest of population did other activities (running or cycling). After comparing the knee alignment level, the roller skaters had an average of 4,75 points less than the non-roller skaters (IC95%: -9,12 a -0,39). This difference was significant even after adapt the effects of age, sexes, lateral dominance and knee alignment. Conclusion: The roller skaters present a less knee functionality than the non-roller skaters. This could show some movements or posture adopted by roller skaters a damage for their knees.
  • Purificación del dominio N-terminal del Factor de Iniciación 3 de Escherichia coli para la selección de Aptámeros

    Milón Mayer, Pohl Luis; Loayza Guzmán, Mariana (Universidad Peruana de Ciencias Aplicadas (UPC), 2018-03-06)
    The present study focuses on the initiation phase of protein synthesis and the generation of aptamers as candidates to reduce the physiological function of the isolated N terminal domain (NTD) of initiation factor 3 (IF-3). Through molecular biology techniques, the correct cloning of the gene coding for IF-3 NTD in plasmid pET24a was verified. This plasmid was used to transform the bacterial model organism Escherichia coli BL21 and thus the massive production of the IF-3 NTD was assessed. Using affinity chromatography techniques, the NTD of the IF-3 was isolated, obtaining high purity degrees and production yields. The purified NTD was used to generate aptamers with the SELEX technique (Systematic Evolution of Ligands by Exponential Enrichment). Five molecules with binding potential to the NTD of IF-3 were found. The present investigation provides the bases to study the interaction of the NTD of IF-3 with the aptamers in cell-free system and thus to evaluate their inhibitory potential. It is expected that these molecules behave as potential new drugs, and therefore they might contribute to cope for the need of new antibiotics.
  • Asociación entre sobrecarga postural y dolor en la zona lumbar en choferes de una empresa de transporte público

    Alvarado Cutipa-Flores, German F.; Antay Bedregal, David Rolando; Camargo Revello, Julia Evelyn (Universidad Peruana de Ciencias Aplicadas (UPC), 2018-02-01)
    Aim: To determine the association between postural overload and low back pain in combis’ (van) drivers of a public transport company. Materials and Methods: A cross-sectional study among 208 “combi” drivers was conducted. Nordic Kuorinka Questionnaire, Bus Drivers Job Demands Scale, Rapid Upper Limb Assessment Scale (RULA) were administered. Poisson regression with robust variance and crude and adjusted Prevalence Ratios (PR) with 95% CI were compute. Results: The prevalence of low back pain was 79.33% and postural overload was associated with low back pain according to RULA, level 3 (PR 1.44 [95% CI 1.05-1.99]) and level 4 (PR 1.72 [IC 95% 1.27-2.32]) with respect to drivers with level 2, after adjustment for body mass index (BMI), age, years of work as a driver and daily hours of work. Conclusion: Drivers who had postural overload had more probability to present low back pain
  • Comparación de las capacidades funcionales entre pacientes que reciben hemodiálisis y diálisis peritoneal en el Hospital Nacional Edgardo Rebagliati Martins Lima- Perú

    Moscoso Porras, Miguel; Becerra Bravo, Giancarlo; Yurivilca Espinoza, Melissa; Garcia Bonilla, Miluska Estefani; Villavicencio Carranza, Mirko (Universidad Peruana de Ciencias Aplicadas (UPC), 2017-12-13)
    Objective: To assess differences in the functional capacity score in patients receiving hemodialysis and peritoneal dialysis. Material and methods: A cross-sectional study was conducted out in Lima, Peru. Participants were patients receiving hemodialysis and peritoneal dialysis from the Nephrology Department of Hospital Nacional Edgardo Rebagliati Martins y sus redes asistenciales. The Functional capacity score was measured through a six-question survey and the application of the Short Physical Performance Battery (SPPB). Differences were identified through mean ration using a Poisson regression analysis. Results: A total of 144 patients, with a mean age of 54 years, were included in this study. Patients undergoing peritoneal dialysis had higher score that those receiving hemodialysis (mean ratio = 1.20, p <0.05). This difference remain significant even after adjusting for age, gender, work activity and comorbidities (mean ratio = 1.25, p <0.05). Conclusions: Patients receiving peritoneal dialysis present better functional capacity when compared to patients receiving hemodialysis.
  • Comparación in vitro del efecto del tipo de luz led de tercera generación (Valo® - Ultradent©) vs. Luz led de segunda generación (Elipar™ - 3M Espe™) en la resistencia de unión del cemento Relyx® U200 al cerómero SR Adoro® - Ivoclar Vivadent®

    Casas Apayco, Leslie Caroll; Cafferata Montoya, Paola Antonella; Araujo Herrera, Nicoll Antuanette; Behrens Peñaloza, Sebastian (Universidad Peruana de Ciencias Aplicadas (UPC), 2018-01-30)
    Purpose: Make an in vitro comparison of the effect of using a second- and third-generation LED curing light on the bond strength of an indirect resin composite to dental enamel cemented with a self-adhesive resin cement. Materials and methods: 44 SR ADORO® indirect resin composite blocks were cemented on 44 bovine incisors using two LED curing lights: ELIPAR™ - 3M ESPE™ (second-generation, 1150 mW/cm2) and VALO® - ULTRADENT© (third-generation - 1400 mW/cm2) and a self-adhesive resin cement (RELYX® U200). The dental curing units’ light intensities were previously measured with a radiometer (Monitex; DigiRate LM 100 - China). The samples were randomly divided into two groups (n=22): Group 1: polymerization was done using the VALO® - ULTRADENT© dental curing unit, group 2: polymerization was done using the ELIPAR™ - 3M ESPE™ dental curing unit. The indirect resin composite blocks were made in a 4mm x 6mm matrix. The cementation of the indirect composite blocks was done with slight vertical pressure on the center of the buccal surface of the tooth and removing the excess resin cement with a microbrush. The curing light was applied for 20 seconds on four sides of the sample. The shear bond strength test was performed in a universal testing machine (3382 INSTRON®-U.S.A). The results of each group were compared using the Mann-Whitney U test. Results: Group 1 (VALO® - ULTRADENT©) resulted in an average bond strength of 5.84 MPa +-2.04, while group 2 (ELIPAR™ - 3M ESPE™) showed an average of 4.16 MPa +-1.25. Statistically significant differences were found (p= 0.0045). Conclusion: Third-generation LED curing lights generate a higher bond strength compared to second-generation curing lights when used to cement indirect resin composites with self-adhesive resin cements.
  • Caries dental en primeras molares permanentes y segundas molares deciduas, según el sistema internacional de evaluación y detección de caries (ICDAS), en relación a la edad y el género de los niños de una Institución Educativa Nacional del distrito de Ate

    Barragán Salazar, Nathaly Carolina; Marin Leiva, Maria Jose (Universidad Peruana de Ciencias Aplicadas (UPC), 2017-09-11)
    Objective: Determine the first permanent and second deciduous molar dental cavity frequency in relation to kids age and gender, in an Educational National Institution in Ate district, during the 2014-2015 period. Materials and methods: This was retrospective study. The unit of analysis was conformed by epidemiological records from 218 kids, between 8 and 10 years old, both female and male, from a public Educational Institution in Ate district, evaluated between 2014 and 2015. Results: The codes with a highest prevalence both in permanent and deciduous molars were 1, 2 and 3, related to enamel cavities. However, the pieces 85 and 46 presented greater prevalence in codes 4 and 6, in 8 and 10 year olds, which relate to dentin cavities. In regards to the gender, both male and female presented greater prevalence in codes 1, 2 and 3. Conclusions: The inclusion of non-cavitated caries lesions is necessary in the caries registers, since these injuries can be stopped through preventive treatment and diagnostic disease development. Nowadays, it is knowledge important because it prevent the development of the pathology, whose purpose would be to maintain the integrity of the dental structure and therefore promote the optimum state of the oral and integral health.
  • Evaluación del espesor del esmalte en primeras premolares y primeras molares permanentes

    Casas Apayco, Leslie Caroll; Rojas Quintanilla, Feliciano; Guerra Gonzalez, Diego Andrés (Universidad Peruana de Ciencias Aplicadas (UPC), 2018-01-30)
    Objective: to assess the thickness of the permanent human tooth enamel, in portions vestibular/palatal-lingual, according to the thirds coronal cervical, middle and incisal. Materials and Methods: A sample of 75 healthy teeth, divided into first premolars (n=25), first molars (n=25) and first molars (n=25). Were cut in strips of 1 mm thick in a digital cutting machine. The measurements were made according to the thirds coronal, cervical, middle and incisal, using a digital gauge to perform the measurement in (mm). A descriptive statistics (mean and standard deviation) of the study variables. Results: The increased thickness of the enamel on the vestibular sense is in the incisal third, with an average of 1.53 mm 0.20 belonging to the molars and the lower value is found in the cervical third with an average of 0.64 mm 0.08 corresponding to the first molars. While, in the palatal/lingual sense, the highest value found is in the incisal third with an average of 1.50 mm 0.19, belonging to the first molars, and the lowest value is in the cervical third with an average of 0.65 mm 0.09 belonging to the first molars. Conclusions: The thickness of the enamel on the vestibular sense as palatal/lingual is greater in the incisal third and lower in the cervical third for the three groups of dental pieces. This knowledge will allow for wear to the tooth in a more conservative doing treatments highly functional and aesthetic.
  • Comparación in vitro de la microdureza superficial de 2 resinas compuestas tipo Bulk Fill sometidas a bebidas energizantes

    Hermoza Novoa, Mónica; Suarez Hoces, Joanna Marisol Elena (Universidad Peruana de Ciencias Aplicadas (UPC), 2018-01-03)
    Objective: The purpose of this study, in vitro, was to compare the surface microhardness of two Bulk Fill resins immersed in energizing beverages. Materials and Methods: A total of 60 resin blocks divided into two groups (n = 30) were used according to each brand of Tetric® N-Ceram Bulk Fill (TNC) and Aura Bulk Fill (Aura) resin, which in turn were divided into Two subgroups (15 resin samples per Red Bull® and Volt®: G1: TNC + Red Bull®, G2: TNC + Volt®, G3: Aura + Red Bull®, G4: Aura + Volt® energizing drink. The microhardness before and after being inmersed to the action of the energizing drinks by the erosive challenge performed in 40 ml of each energizing drink / 15 test bodies of each group (10 minutes + 1 time day / 5 days). Data was analyzed with Student's t-test. Results: The initial and final microhardness values were obtained: G1 74.46 kg / mm2 + - 5.98 / 60.33 kg / mm2 + - 6.95, G2 74.8 kg / mm2 + - 6.15 / 60.4 kg / mm2 + - 7.05, G3 57 kg / Mm2 + - 8.41 / 42 kg / mm2 + - 8.82, G4 53.13 kg / mm2 + - 6.66 / 41.73 kg / mm2 + - 8.14. When comparing the erosive effect of both energizing drinks, these did not present significant differences for the Tetric N-Ceram Bulk Fill resin (p = 0.59). However, the Aura Bulk Fill inmersed in Volt had significant differences (p = 0.022), showing that this beverage presented greater erosive effect than the Red Bull beverage. Conclusion: When comparing the surface microhardness of both resins before and after the in vitro erosive challenge of the energizing drinks, the Tetric N-Ceram Bulk Fill resin presented a smaller reduction of superficial microhardness in comparison to the resin Aura Bulk Fill.

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