Now showing items 41-60 of 139

    • Evaluación del PH y solubilidad de un material experimental de restauración temporal a base de óxido de zinc, cemento portland y arcilla dolomita para su uso en endodoncia

      Valverde Huaranga, Juan Carlos; Lara Baldeon, Gerson (Universidad Peruana de Ciencias Aplicadas (UPC), 2018-01-15)
      Objective: The purpose of the present study was the in vitro pH and solubility of an experimental cement based on zinc oxide, Portland cement and dolomite clay with other cements commonly used as temporary restoration in endodontics Ketac™ Molar Easymix, Zinc Oxide Eugenol, Clip F and Coltosol® F. Materials and methods: One hundred ten polyethylene tubes were filled with the cements corresponding to the 5 groups (n = 22). Fifty-five of these samples were immersed in 10 ml of distilled water and incubated at 37 ° C. The pH was determined with a digital pH meter after one day and the 3, 7, 14, 21 and 28 days of immersion were determined. In addition, the initial weight of 55 samples were recorded, immersed in artificial saliva at pH 7 and incubated at 37 ° C for 7 days. After this period the samples were dried, stored in a desiccator containing anhydrous calcium sulfate for 60 min and weighed. Data were analyzed using ANOVA and Student’s t-test (P <0.05). Results: Experimental cement showed alkaline values in all periods evaluated and significantly different from other materials (p <0.005). As for the solubility study, only the significant difference in Coltosol and experimental cement was found, there being a lower solubility after 7 days in the Coltosol® F followed by the experimental cement, Ketac™ Molar Easymix, Zinc Oxide Eugenol and Clip F. Conclusion: Experimental cement based on zinc oxide, Portland cement and clay dolomite showed alkalinity and low solubility, properties sought in a temporary restoration material in endodontics.
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    • Comparación de la resistencia a la compresión de un cemento experimental con el óxido de zinc y Eugenol, Coltosol® F, Ketac™ Molar y Clip F

      Gonzales Soto, Néstor; Reyes Galindo, Carmen Maritza; Moscoso Huamaní, Melissa Alexandra (Universidad Peruana de Ciencias Aplicadas (UPC), 2018-12-31)
      Objective: Compare the compressive strength of the experimental cement with Zinc Oxide and Eugenol, Coltosol ® F, Ketac™ Molar Easymix 3M (ESPE) and Clip F (VOCO). Materials and Methods: This study was of experimental type in vitro. The analysis unit consisted of a cylinder-shaped specimen with the different temporary restoration materials. The sample had 10 groups of 11 specimens each, distributed according to the type of material and the measurement times, with uniform measurements of 6mm in diameter and 4mm in height. Then, these samples were immersed in distilled water until their respective measurement. After that, the compressive strength was evaluated on the Instron® machine at a speed of 1mm/ 1min. Finally, the data was analyzed using the Kruskall Wallis test. Results: In this study, the experimental cement obtained higher values of compressive strength (10.78+0.77 MPa in the 7th day) and (2.94 ± 1.03 MPa in the 14th day) in comparison of Coltosol® F (7.87+0.61MPa) and (2.72 ± 0.32MPa); and Zinc Oxide and Eugenol (6.22+0.78 MPa) and (1.64 ± 0.50MPa). That means that statistically significant differences between all temporary restoration materials were found. Conclusions: Between the days 7 and 14, the compressive strength of the experimental cement was higher than the Zinc Oxide and Eugenol and Coltosol® F materials. However, the highest values of resistance were for the Ketac™ Molar Easymix 3M (ESPE) and Clip F (VOCO) groups.
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    • Comparación in vitro de la fuerza de adhesión de postes de fibra de vidrio con superficie tratada previo a su cementación con un agente resinoso autograbante

      Revoredo De Rojas, Arturo; Sánchez Ríos, Fiorella; Torres Rivera, Juan Miguel (Universidad Peruana de Ciencias Aplicadas (UPC), 2018-01-23)
      Objective: This in vitro study compared the fiberglass posts bond strength treated with differents surface treatments before their cementation. Materials and Methods: Forty bovine teeth were seccionated in two, obtaining 21mm bovine roots. Bovine roots were endodontically treated and randomly divided into four groups according to the surface treatment of the post: Group 1 (Silane), Group 2 (Phosphoric Acid, Silane), Group 3 (Hydrogen Peroxide, Silane) and Group 4 (Silane, Adhesive). After that, the fiber posts were cemented with a resin agent (RelyX U200 - 3M ESPE), according manufacturer instructions and the samples were stored for 24 hours in distilled water at 37 °C. Roots were cut in slides in a digital cutting machine in order to obtain a 1 mm sample. Push out test was used to measure the bond strength at the speed of 0.5 mm/min. Results: The adhesion strength of the groups did show differences in their medians (p = 0.010). In the pairwise comparisons where it was using the Kruskal Wallis test, the (Group 1 vs. Group 3), (Group 1 vs. Group 4), (Group 2 vs. Group 3), and (Group 2 vs. Group 4) did found statistically significant differences (p = 0.010, p = 0.004, p = 0.009, p = 0.019).In the other pairwise comparisons using the posthoc of kruskall wallis test, the (Group 1 vs. Group 2), and (Group 3 vs. Group 4), were no found statistically significant differences (p = 0.394 and p = 0.387),so the Group 3 and Group 4 had higher adhesion forces (median of 3.49 MPa and 4.13 MPa respectively). Conclusion: The surface treatment of the fiberglass post, with Hydrogen Peroxide with Silane, and Silane with Adhesive obtained better results of adhesive strength.
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    • Estimación de la edad basada en el volumen de la cámara pulpar de primeras molares superiores mediante tomografías computarizadas en una muestra de adultos en Lima

      Agurto Huerta, Andrés; MOLINA SUSANO, EDSON BRANDON (Universidad Peruana de Ciencias Aplicadas (UPC), 2017-11-15)
      Objetivo: Estimar la edad basada en el volumen de la cámara pulpar de primeras molares superiores permanentes mediante tomografías computarizadas de haz cónico (CBCT) obtenidas en un centro radiológico de Lima, 2016. Materiales y métodos: Estudio transversal que incluyó a 300 primeras molares superiores permanentes sanas y vistas en CBCT para establecer un modelo matemático de 99 mujeres y 95 pacientes varones entre 11 y 70 años. Todas las imágenes CBCT se adquirieron por el equipo PROMAX 3D de la Empresa Planmeca® y se reconstruyeron con un tamaño vóxel de 0,16 mm. Posteriormente, las imágenes se exportaron como conjuntos de datos DICOM y se importaron en una imagen 3D de segmentación automática y software de conteo de vóxeles ROMEXIS 3.4.0.R para el cálculo de los volúmenes de la cámara pulpar. Un análisis de regresión lineal se llevó a cabo con la edad como variable dependiente y el volumen de la cámara pulpar como variable independiente para establecer un modelo matemático. Se consideró a una persona como cluster. Inicialmente, evaluamos la correlación (Coeficiente de Pearson) entre la edad real y el volumen de la cámara pulpar. Para identificar la exactitud del modelo matemático se evaluó el error estándar para calcular el intervalo de confianza al 95% de los estimados. Además, se comparó los coeficientes de determinación entre la muestra total con ambos sexos. Resultados: La correlación entre la edad cronológica y el volumen de la cámara pulpar fue de –0.83. El modelo matemático de estimación para toda la muestra fue: EDAD=-1.197444*(volumen de la cámara pulpar)+61.33765. Las regresiones fueron estadísticamente significativas (p<0,001). El coeficiente de determinación (R2) para la muestra total fue de 0.695. Sin embargo, al estratificar por sexo fue más alto (0.733) en el sexo femenino. El modelo mostró una precisión de ± 4.94 años en la edad estimada. Conclusión: El volumen de la cámara pulpar explica el 70% de la variabilidad de la edad, por lo tanto podría ser un indicador útil para la estimación de la edad humana con una exactitud razonable.
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    • Anatomía de los senos maxilares: correlación clínica y radiológica

      Vargas Arze, Nelson Javier (Universidad Peruana de Ciencias Aplicadas (UPC), 2014-12-01)
      Los senos maxilares y las raíces de las piezas dentarias posteriores, se encuentran próximas y en estrecha relación, por lo tanto es importante que el cirujano dentista esté en la capacidad de prevenir el compromiso de estas estructuras anatómicas mediante una adecuada evaluación radiográfica. El propósito de este artículo es realizar, desde el punto de vista radiográfico, una breve descripción de las variantes anatómicas y de algunas alteraciones a nivel de los senos maxilares.
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    • Estudio comparativo del índice de placa posterior a la aplicación de dos materiales educativos en diferentes intervalos de tiempo

      Berastain Arenas, Juan Francisco; Maccha, Lessly; Montenegro Guzman, Heydi Margarita (Universidad Peruana de Ciencias Aplicadas (UPC), 2017-11-09)
      Objective: The aim of this study was to compare the plaque index after the application of two educational materials in different time intervals. Materials and Methods: 100 students aged 10 to 12 years old were evaluated. The sample was divided into four groups, received educational interventions on oral health in different periods of time (every 15 or 30 days) and educational material (physical or multimedia) for three months. Subsequently, the index of the dental plate was evaluated according to O'Leary plaque index. Results: The analysis showed statistically significant differences in the four groups when evaluating the plaque index after performing the educational interventions (p <0.01). In the last control, plaque values of 20.2 and 19.4 were found for groups educated every 15 days with physical and multimedia material. In the groups with interventions every 30 days with physical and multimedia material, values of 15.3 and 15.2 were found, respectively, with no significant difference between the latter results. Conclusion: Better results were obtained in the educated groups every 30 days, regardless of the educational material applied. Educational interventions could help improve the oral health of schoolchildren in this population.
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    • Microfiltración coronal de un material de restauración temporal experimental para su uso en endodoncia

      Gonzales Soto, Nestor; Junes Prado, Luisa Stephanie Nohelya (Universidad Peruana de Ciencias Aplicadas (UPC), 2017-03)
      Coronal microfiltration caused by temporary restorative materials is considered one of the causes of failure in endodontic treatments. As a result, in recent years it has been sought to create a temporary restoration material that is capable of avoiding this problem. Objective: compare in vitro coronal microfiltration of an "experimental cement" and four temporary restorative materials used in endodontics. Materials and methods: Class I cavities were made in 90 premolars, divided into 10 groups (n = 9) and evaluated in two time periods (1 and 2 weeks. The experimental cement was elaborated, later the coronal sealing of the dental pieces was carried out, with experimental Cement,F (VOCO), Eugenato (MOYCO), Ketac ™ Molar Easymix 3M (ESPE) and Coltosol®F were used for the preparation of the experimental. The specimens were immersed in Chinese ink (Pelikan) for 1 and 2 weeks. Microfiltration at the dentinal wall-temporal restoration interface was evaluated using a stereomicroscope (Leica Microsystems LAS EZ version 2.0.0). Results: We found statistically significant differences (p <0.05) when coronal microfiltration of the five temporary restoration materials were compared, according to the ink exposure time (1 and 2 weeks). In both weeks, the experimental cement presented less filtration than Coltosol® F and Ketac ™ Molar Easymix 3M (ESPE). On the other hand, when comparing the coronal microfiltration of the experimental cement with each of the temporary restoration materials, we found statistically significant differences for the experimental group - Ketac ™ Molar Easymix 3M (ESPE) in the first week (p <0.001) and in the second week (p = 0.003). Conclusion: Experimental Cement presented lower microfiltration than Coltosol® F and Ketac ™ Molar EasyMix 3M (ESPE). However, none of the materials were able to prevent microfiltration totally
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    • Factores asociados a la reabsorción radicular inflamatoria en molares deciduas de pacientes de odontopediatría de una clínica docente en Lima, 2011-2015

      Geller Palti, Dafna; Quiñones Ascanoa, Silvana Milagros; Valiente Siles, Adriana Liliana (Universidad Peruana de Ciencias Aplicadas (UPC), 2017-08-03)
      Objective. To determine the prevalence and associated factors of inflammatory root resorption (RRI) in primary molars in children of 3 to 10 years of age, who were attending at the Clínica Docente in Lima, Peru during the years 2011-2015. Methods. Clinical histories and periapical radiographs and bitewings of the primary molars were evaluated to determine the presence of inflammatory root resorption. Variables such age, gender and medical history of pulp treatments and previous restorations, carious lesions with or without pulp involvement and the presence of osteolytic process were also evaluated. All the data were analyzed using simple and multiple Poisson regression models and their confidence intervals were of 95% to calculate crude and adjusted prevalence ratios (RPa). Results. Were included 566 children and 1744 primary molars. The 52.9% were male; mean age 6.3 years (d.e. 0.9). The prevalence of RRI was 25.3%. Children with history of caries with pulp involvement [RPa:4.45; IC95%:3.44 a 5.75], pulp treatment [RPa:5.00;IC95%:3.79 a 6.61], the osteolytic process [RPa:3.04;IC95%:2.58 a 3.60] and age [RPa: 1.09; IC95%:1.05 a 1.13]. were factors asssociated with RRI. Conclusions. One of four patients had RRI. Carious lesions with pulp involvement, pulp treatment and osteolytic process were associated with a higher prevalence of RRI.
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    • Asociación del índice de masa corporal con la presencia de caries dental en escolares de 6 a 12 años

      Ñaupari, José Raúl; Díaz Novoa, Jeannete; Castellares Espinoza, Dacy Fiorella; Ramos Mejía, Pedro Martín (Universidad Peruana de Ciencias Aplicadas (UPC), 2017-07-11)
      Objective: To determine the association of body mass index with the presence of dental caries in schoolchildren aged from 6 to 12 years attending to the school No. 7076 "Brisas de Villa" UGEL - 07 - Chorrillos in 2016. Methods: The present study was descriptive and cross-sectional. It was performed on 402 schoolchildren from ages 6 and 12, men and female. Likewise, CMF / dmf, DMF with gender, age and O'leary index were associated. Results: 402 schoolchildren were observed and dental caries was evaluated clinically by the DMF and dmf index, obtaining an average value of 2.09 ± 2.48 and for the dmf of 4.09 ± 3.79. 52.24% of the students were not overweight or obese, 25.37% were found to have an overweight problem and 22.39% were found to have obesity problems. There was no statistically significant association between BMI and presence of dental caries. However, there was an association between dental caries and oral hygiene index. Conclusion: There is no significant relationship between dental caries and BMI in the study population. However, the presence of dental caries and nutritional problems in schoolchildren are high.
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    • Evaluación radiográfica de la profundidad de las terceras molares y su proximidad con el nervio dentario inferior en pacientes de 18 a 35 años atendidos en la clínica docente UPC

      Zuiko Felix, Alfredo; Vera García, Leslie (Universidad Peruana de Ciencias Aplicadas (UPC), 2017-01-01)
      Objective: To relate the depth of the third molars and their proximity to the inferior dental nerve according to the classifications of Pell and Gregory and Abu-el naaj in population that attend a Clinical Teaching Odontology of Lima, Peru. Materials and Methods: A retrospective, descriptive and cross-sectional study was carried out to analyze panoramic radiographs of patients seen at outpatient clinic during the years 2011-2016. The evaluation was performed by a single calibrated evaluator. Data were analyzed using frequencies and medians. To perform associations, the chi square test and fisher were used. Results: A sample of 978 patients was included, with a median age of 23 years (interquartile range: 21 to 25); 51.6% were women. The results found for the category with the highest risk of exodontia in the two classifications were: for Pell Gregory: 8.4% on the left side of the mandible. Abu-el- naaj: Type II B 2.2% right side and 3% left side of the mandible, Type III: 0% right and left side of the mandible. According to the two classifications, differences in depth were found for male gender (Pell and Gregory Class A: 30.4% vs. 26.8% female, p = <0.001). In addition, according to the association of both classifications referring to the proximity of the dental nerve was observed the type IIB of Abu-el naaj in greater relation with class B of Pell and Gregory 2.04%; p= <0.001. Conclusion: In the study, a higher prevalence of Class A was found: 30.4% in men, which presented lower third molar depth compared to women. In addition, a higher ratio of class B to type IIB was found.
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    • Comparación in vitro de la precisión dimensional de dos técnicas de impresión

      Pagan Yabar, Luis; Céspedes Brea, Bárbara Alisson (Universidad Peruana de Ciencias Aplicadas (UPC), 2017-06-26)
      Objective: Compare in vitro the dimensional precision of the polivinil siloxano using the technique of impression of double mixture; double impression with margin relief and double impression with total relief. Materials and methods: The samples were composed of 42 impressions using Putty-Spedeex polivinil siloxano from a master stainless steel model, which presented two homogeneous pillars that simulated the preparation for a crown. These samples were divided into 3 groups according to the printing technique (double mix, double impression with margin relief and double impression with total relief). In order to determine the dimensional accuracy of the final models in comparison to the master model, 7 measurements (MD1, MD2, VL1, VL2, AL1, AL2, DI) were performed with a coordinated machine, Contura G2 model with contact scanning technology ZEISS. Statistical tests were performed Kruskal-Wallis and U of Mann-Whitney. Results: Statistically significant differences (p˂0.001) were found in measures MD1, MD2, AL2 when comparing the three printing techniques with the master model. The double impression technique with total relief presented a greater number of measures (MD1, MD2, VL1, AL1, DI) than did not show statistically significant differences (p <0.005) in comparison to the master model. Conclusions: The technique of double impression with total relief presented greater dimensional accuracy than the techniques of double mixing and the technique of double impression with relief of the margin using silicone of condensation.
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    • Comparacion in vitro de la rugosidad superficial de dos resinas tipo bulk fill con dos sistemas de cauchos abrasivos

      Hermoza, Monica; Vásquez Jiménez, Nadieska Morayma (Universidad Peruana de Ciencias Aplicadas (UPC), 2016-06-16)
      Objective: Comparison in vitro the superficial roughness of two Bulk Fill resins using two polishing systems of abrasives rubbers: JOTA® (Switzerland) (aluminum oxide, silicium carbide and silicone) and Optimize® (TDV) (Germany) (silicone- aluminum oxide). Materials and methods: Were used 60 resin specimens of resin divided in four groups G1: Tetric-N Ceram® Bulk Fill (Ivoclar Vivadent, USA)/ polishing system JOTA®( Switzerland), G2: Tetric-N Ceram® Bulk Fill (Ivoclar Vivadent, USA)/polishing system Optimize® (TDV) (Germany), G3: Aura Bulk Fill (SDI, Brazil) / polishing system JOTA® (Switzerland) y G4: Aura Bulk Fill (SDI, Brazil) / polishing system Optimize® (TDV) (Germany). All the specimens were made in a metal matrix (6mm x 4mm), were the resins were inserted with a resin spatula (TNCIGFT2 Hu Friedy), and fotoactivated with a lamp Elipar LedTM (3M-ESPE), with an intensity of 1200 mW/cm2. Immediately, the initial roughness of all groups is measured with the Roughness meter Mitutoyo SJ-210P (China). Subsequently, the polishing was executed out with the two rubber systems according to each group, and the final roughness was measured. Results: Statistically significant difference was found on the roughness of G1. This is even greater than all the groups evaluated, and that the smallest difference was in the G2 group. A statistically significant difference was found when comparing the two resins with the polishing systems evaluated. Conclusions: The surface roughness found in the evaluation of Bulk Fill Tetric-N Ceram® Bulk Fill (Ivoclar Vivadent, USA), with the JOTA® (Switzerland) polishing system presents the lower roughness than Aura Bulk Fill resin (SDI, Brazil) with the two polishing systems evaluated.
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    • Evaluación del conjunto de síntomas del Burn Out en estudiantes de pregrado de 5to a 10mo ciclo de la Escuela de Odontología de la Universidad Peruana de Ciencias Aplicadas

      Ghersi, Vanessa; Gargurevich, Rafael; Angulo Belerin, Karen Janet (Universidad Peruana de Ciencias Aplicadas (UPC), 2017-06-23)
      The following research analyzed a set of symptoms of Burn Out on the students of Dentistry School at Universidad Peruana de Ciencias Aplicadas. It was performed with a number of 139 students belonging to 5th to 10th semesters, trough a survey called “ Maslach Burn Out Inventory’’, which considered the following factors: emotional exhaustion, depersonalization and personal fulfillment. Students who had a higher score than 26 on exhaustion, more than 9 on depersonalization, and less than 34 on personal achievement, were considered to have Burn out Syndrome. In that way each individual was evaluated and then the results were transferred to a database. According to the results, it was observed that students who showed the highest exhaustion were those belonging to the 7th semester with an average of 33.72. With respect to the depersonalization we observed an average of 9.88, it was found that 8 students belonging to the 8th semester where most affected with Burn Out Syndrome. The highest personal performance was the 10th with a mean of 39.72 points. In conclusion, it was found that 28 students had Burn Out Syndrome and 111 did not present it, the semester with the most affected students was the 8th , with 8 students with Burn Out Syndrome
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    • Características clínicas y radiográficas de las pulpotomías realizadas en el área de odontopediatría del Centro Universitario de Salud de la UPC durante el año 2014

      Carrillo Sarmiento, Karla Janette; Caballero García, Carmen Stefany; Rosas Rios, Darian (Universidad Peruana de Ciencias Aplicadas (UPC), 2016-12-01)
      Objective: To assess the clinical and radiographic features of the pulpotomy formocresol after 12 months. Materials and methods: a descriptive, transversal study that evaluated the clinical and radiographic features of 97 teeth with treatment of pulpotomy who attended the postoperative control after a year of performed treatment. The presence of history of pain, mobility, fistula and sensitivity in the tooth with treatment was observed for clinical evaluation. In radiographic evaluation was performed take a periapical radiograph to determine the presence of pathological findings such as loss of hard blade, IRL compatible with furcation and pathological resorption of internal and external lesion. Results: The prevalence according to clinical characteristics were 1 case of (1.03%) presence of pain history, 6 (6.18%) sensitivity, 3 (3.09%) mobility and 2 (2.06%) fistula; radiographic evaluation found 1 (1.04%) case of hard blade loss, 19 (19.58%) compatible with furcation lesion IRL, 3 (3.09) internal root resorption and 1 (1.04%) external root resorption. Conclusion: The results indicate a low percentage of pathological traits observed clinically and radiographically after one year of treatment.
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    • Resistencia al cizallamiento e índice adhesivo remanente (ARI) utilizando primers hidrofílico e hidrofóbico expuestos a contaminación con agua y saliva

      Córdova Berrocal, Andrés; Malpica Lindao, Rita Sofia (Universidad Peruana de Ciencias Aplicadas (UPC), 2017-05-22)
      Objective: To compare shear bond strength and the remaining adhesive index (RAI) of two types of primers: hydrophilic (Transbond™ MIP) and hydrophobic (Transbond™ XT Light Cure Adhesive y Rely-a-bond®) on bovine teeth enamel exposed to contamination (saliva and water) and without contamination. Materials and Methods: 99 permanent bovine incisors were used and divided into nine study groups, three groups for each primer: Group 1 , 2 and 3 with Transbond™ MIP; Group 4, 5 and 6 with Transbond™ XT Light Cure Adhesive; Group 7, 8 and 9 with Rely-a-Bond® and every primer was evaluated without contamination, and then contaminated with saliva and water. The measurements of shear strength bond were performed on the universal test machine INSTRON® at a rate of 0.5 mm per minute, RAI was evaluated in all samples. Results: The measurement of shear bond strenght in the non contaminated groups was similar to the Transbond™ XT Light Cure Adhesive and Transbond™ MIP primers, but significantly lower for the Rely-a-bond® primer (p<0.05). In the contaminated samples, the Transbond™ MIP primer had higher shear bond strength than the hydrophobic primers. Significant statistically differences were found in all groups (p<0.001). RIA was evaluated and it was found that the majority of groups had results of grade 0 and 1. Conclusions: Water and saliva contamination decreased shear bond strenght using hydrophobic primers. On the other hand, the hydrophilic primer was not affected by the water and saliva contamination.
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    • Comparación in vitro de la microfiltración de los cementos de ionómero de vidrio Ketac™ Molar easy mix e Ionofil Molar® en cavidades clase I con dos técnicas de aplicación: jeringa centrix y espátula TRA

      Barragán Salazar, Nathaly Carolina; Basurto Sampedrano, Katherine Elizabeth (Universidad Peruana de Ciencias Aplicadas (UPC), 2016-12-01)
      Introduction: Atraumatic restorative treatment is used as part of preventive public health programs, so it is important to evaluate the application techniques of restorative material. Objective: Compare the microleakage of the Ketac ™ Molar Easy Mix and Ionofil Molar® between two application techniques: Centrix syringe and spatula TRA. Materials and methods: It was an experimental in vitro study. 52 teeth of bovine with cavity preparations (3x2x2 mm) were used. The teeth were divided into 2 groups according to ionomer cements, also were subdivided, according to the technique. The restorative material was placed following the manufacturer's instructions. All teeth were thermocycled. Then, the teeth were immersed in methylene blue 0.5% and sectioned. It was evaluated with an stereomicroscope software. Results: The microfiltration of Ketac ™ Molar Easy Mix and Ionofil Molar® ionomeric cements according to centrix syringe and TRA spatula application techniques showed no statistically significant differences (p value> 0.05). The Ketac TM Molar Easy Mix cement and the technique with the centrix syringe were those that presented less microfiltration. Conclusion: All teeth presented microleakage and among them the group KetacTM Molar Easy Mix® with centrix syringe showed lower values of microleakage.
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    • Estudio de la anatomía de las raíces y conductos radiculares en segundas molares permanentes mandibulares mediante tomografía computarizada de haz cónico.

      Agurto Huerta, Andrés; Granda Morón, Germán Augusto (Universidad Peruana de Ciencias Aplicadas (UPC), 2016-12-01)
      Objective: Determine the anatomy of roots and root canals in mandibular second permanent molars by cone beam computed tomography Materials and Methods: 400 mandibular second permanent molars views in CT of patients treated at the Instituto de Diagnóstico Maxilofacial (IDM) in a period January - June 2015. The anatomy of the pieces was analyzed in the axial and sagittal planes, which determined the number of roots and root canals, canals type according to the classification of Vertucci in the mesial and distal root, the presence of C-shaped canals and type of C-shaped canals according to the classification of Melton. Results: SMMP was found with two roots 287 (71.75%). On the other hand, three Canals was observed in 282 (70.50%) teeth. It was also noted that for the type of canals in the mesial root of Type II showed 66 (16.50%) and Type III showed 66 (16.50%). Also, in distal root was found Type I 357 (89.25%). In addition to the presence of C-shaped root canals system was observed in 113 (28.25%) pieces and in 287 (71.75%) was absent. Finally, for the type of C-shaped canals the most predominant type was "c3" 61 (15.25%). Conclusion: We conclude that the SMMP have two roots with three root canals and canals settings in the mesial root is Type II and III, while the distal root is the type I. There is also a high prevalence of ducts C-shaped, being the most prevalent type "c3".
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    • Prevalencia de maloclusiones y necesidad de tratamiento ortodóncico (iotn), en escolares con dentición mixta del distrito de Ate Vitarte en el año 2015

      Córdova Berrocal, Andrés; Morales Caycho, Deborah Diahan (Universidad Peruana de Ciencias Aplicadas (UPC), 2016-12-01)
      Objective: To determine the prevalence of malocclusions and orthodontic treatment need using the Index of Orthodontic Treatment Need (IOTN) in schoolchildren with mixed dentition from a Public School in Ate Vitarte, Peru. Materials and Methods: 252 schoolchildren aged between 9-12 years (both genders) with mixed dentition were including. Children with physical or mental disabilities, active or previous orthodontic treatment and no collaborators were excluded. Fisher´s exact test was used to associate malocclusion with the Dental Health Component, Dental Health and Aesthetic Component with age and gender. Results: According to the Index of Orthodontic Treatment Need modified, the prevalence with the Dental Health Component for grades 4-5 was 25.4% and with the Aesthetic Component for grades 8-10 was 5.6%. No statistically significant differences (p = 0.247, p = 0.056, p = 0.271 and p = 0.942) were presented to the prevalence of Orthodontic Treatment Need for Aesthetic and Dental Health Components by gender and age. Statistically Significant difference (p = 0.000) was found between the prevalence of malocclusions and orthodontic treatment need. Conclusions: The prevalence of malocclusions and orthodontic treatment need in class I was 13.9%, class II-1 of 7.9%, class II-2 and class III 1.2% 2.4% 6. Index of Orthodontic Treatment Need showed strong association with each class of malocclusion.
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    • Prevalencia de hábitos orales y alteraciones dentoalveolares en niños de 6 a 12 años atendidos en la clínica docente UPC en el año 2011-2014

      Campos Campos, Katherine Jeanette; Espinoza Calle, Irem Sthefany (Universidad Peruana de Ciencias Aplicadas (UPC), 2016-12-01)
      Objective: This study aimed to assess the prevalence of oral habits and dentoalveolar alterations among 6- to-12-year-old children treated at the Teaching Private Hospital. Material and methods: It is a descriptive, observational, cross- sectional and retrospective study with a sample size of 1,006 medical records of 6- to-12-year-old children treated at UPC teaching Clinic were reviewed of medical records of children 6 to 12 years, children and male and female medical records that were authorized by specialists of Pediatric Dentistry and Orthodontics area was included. Medical records of children without DNI and children with special needs were excluded. Results: It was found a predisposition towards an atypical swallowing habit (19,48%); digit sucking (2,19%); and mouth breathing (0,20%). The prevalence of dentoalveolar alterations was: anterior crossbite (8.65%), and posterior crossbite (5,27%); anterior open bite (9,74%) and posterior open bite (0.89%); Angle´s Class I (57,95%), Class II (18.98%) and class III (10,64%) right molar relationship; Angle´s Class I (55.86%), Class II (18.39%) and Class III (14.61%) left molar relationship; right mesial step (6.66%), flush step (0.89%) and distal step (0.40%); left mesial step (6.16%), flush step (0.99%) and distal step (0.70%); overjet of 1mm to 4mm (70.78%), greater than 4mm (11.93%) and less than 4mm (6.26%); overbite of 10% to 40% (45.03%), greater than 40% (16.60%) and less than 10% (11.43%). No association was found between age and gender and the oral habits. An association was found between age and left and right molar relationship in terms of Angle´s classes, overjet and overbite (p=0.001); whereas no statistically significant association was found with gender and dentoalveolar alterations. Conclusions: The study concluded that the most prevalent oral habit was atypical swallowing and dentoalveolar alteration of anterior open bite.
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    • Determinación de la contaminación bacteriana por aerosoles según localización y tiempo en los ambientes de la clínica docente de la UPC

      Yovera, Ana July; Rojas Infante, Olenka (Universidad Peruana de Ciencias Aplicadas (UPC), 2017-02-08)
      Objective: Determine the bacterial microorganisms present in sprays originated by dental handpieces according to it´s location and time spent on Clinica Docente de la UPC´s environment. Materials and methods: A total of 90 blood agar plates were used in three groups of 30 plates each. The first group consisted of 30 control plates that were exposed before the opening of the clinical shift and without contact with patients. The second group also consisted of 30 plaques that were exposed to the aerosols for fifteen minutes. Two plates were used for each dental unit, located in two different sites. One plaque was placed in the lavatory and the other on the patient's breast. The third group of plaques were exposed under the same protocol, but for 120 minutes. Subsequently, counts of Colony Forming Units (UFC), Gram staining and identification tests were performed, with the objective of identifying the genus of microorganisms in the oral cavity. Results: Most bacteria found are Gram positive belonging to Staphylococcus spp and Streptococcus spp. Conclusions: There is more bacterial contamination near a rotating instrument and a longer time of its use.
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