Examinando por Autor "Vargas Corpancho, Francisco Antonio"

Mostrando 1 - 4 de 4

Acceso abierto
Comparación de la microfiltración marginal en restauraciones directas con resina compuesta en cavidades clase IV y V utilizando una técnica convencional vs la agregación de un sellador de superficie, Lima - 2024
(Universidad Privada Norbert Wiener, 2025-11-17) Onayramo Roman, Andres; Vargas Corpancho, Francisco Antonio
El presente estudio tuvo como objetivo determinar si existen diferencias en el grado de microfiltración marginal en restauraciones directas de cavidades Clase IV y V utilizando la técnica convencional con resina compuesta Filtek™ Z350 XT frente a la agregación de un sellador de superficie (FORTIFY). Se utilizó un enfoque cuantitativo, con diseño aplicado, experimental, analítico y de corte transversal, basado en mediciones numéricas y análisis estadístico inferencial. La muestra estuvo conformada por 40 piezas dentales humanas extraídas por motivos ortodónticos, divididas en cuatro grupos de 10: dos con restauraciones convencionales y dos con aplicación del sellador, mediante un muestreo no probabilístico por conveniencia. Los resultados mostraron que la aplicación del sellador redujo significativamente la microfiltración marginal en comparación con la técnica convencional (p=0.007), siendo el efecto más evidente en cavidades Clase IV. La prueba post-hoc de Tukey confirmó diferencias significativas entre los grupos sin sellador y los grupos con sellador, particularmente en cavidades Clase V. En conclusión, la adición del sellador de superficie FORTIFY demostró ser una estrategia eficaz para disminuir la microfiltración marginal y mejorar la adhesión de las restauraciones directas con resina compuesta. Se recomienda su incorporación en la práctica clínica para optimizar la durabilidad y estabilidad marginal de las restauraciones.
Acceso abierto
Comparative dimensional analysis of the lumen of .022“ x .028“ tubes of six brands of orthodontic straight wire marketed in Peru in 2021
(Universidad Privada Norbert Wiener, 2022-12-15) Arce Estacio, Juan Peter; Vargas Corpancho, Francisco Antonio
This research aimed to determine the dimensional differences in the slots of .022” x .028” straight orthodontic arch tubes from six brands marketed in Peru in 2021. The research approach was quantitative, applied, and non-experimental. The non-probabilistic sample consisted of 60 upper tubes from the brands under study. The testing took place in an HTL testing laboratory in Lima, Peru. Data collection was carried out using a data collection form validated by three experts. Results: Regarding the tube slot dimensions based on height and depth, it was found that all measurements were oversized compared to the nominal value. In terms of the tube outlet dimensions based on height, all measurements were oversized except for C.C.O, which was within the American tolerance. The outlet depth measurements were oversized, with the Andrews 2 tubes being undersized. When comparing the entry and exit measurements based on height and depth between all study groups, statistically significant differences were found.
Acceso abierto
Comparison of the soft tissue profile between Caucasian and mixed-race Peruvians evaluated using the Powell, Legan, and Burstone analysis during the 2015-2017 period. Lime. Peru.
(Universidad Privada Norbert Wiener, 2022-05-21) Linares Weilg, Carlos Antonio; Vargas Corpancho, Francisco Antonio
This is a cross-sectional study with a quantitative approach and a descriptive-retrospective design. The population consisted of 1500 radiographs and lateral photographs of mestizo Peruvians aged 18 to 40 years from the Radiological Center Imágenes between 2015 and 2017. Using inclusion and exclusion criteria, 60 participants were randomly selected (30 men and 30 women). Measurements were taken using the Nemoceph software, and the data was recorded in a data collection sheet and processed with SPSS v26. Normal distribution and variance homogeneity were determined (Shapiro-Wilk). The Student’s t-test was applied with a 95% confidence level. Statistically significant differences (p<0.05) were found in 3 of the 5 measurements of the Powell analysis: Naso Frontal Angle, Naso Mental Angle, and Mental Cervical Angle with p-values of 0.001, 0.04, and 0.001, respectively. Statistically significant differences were also found in all 7 measurements of the Legan and Burstone analysis: Facial Convexity Angle, Mandibular Protrusion, Maxillary Protrusion, Vertical Height Ratio, Neck Angle and Lower Third of the Face, Vertical Height and Depth Ratio of Lower Face, and Naso Labial Angle, with p-values of 0.001, 0.001, 0.001, 0.02, 0.001, 0.001, and 0.03, respectively. Additionally, significant statistical differences were found in the soft tissue profile of mestizo Peruvians evaluated using the Powell, Legan, and Burstone analysis by sex.
Acceso abierto
Concordance of the morphological facial index and angle of the facial opening in the determination of the facial biotype in residents aged 20 to 24 years from the district of Vicco, Pasco 2021
(Universidad Privada Norbert Wiener, 2023-10-17) Canteño Palacín, Lynda Dámariz; Vargas Corpancho, Francisco Antonio
The purpose of this study was to determine the concordance between the morphological facial index and the facial opening angle in determining the facial biotype in individuals aged 20 to 24 years in the district of Vicco. The study had a quantitative, cross-sectional approach and a non-experimental design. The sample consisted of 103 individuals aged 20 to 24, for whom frontal photographs were taken for facial biotype analysis. Concordance was tested using Cohen's Kappa coefficient. The results showed that, based on the morphological facial index, the facial biotype was mesofacial in 59.2%, brachyfacial in 24.3%, and dolichofacial in 16.5% of the population. By sex, mesofacial was found in 59.6% of females and 58.8% of males. Regarding the facial opening angle, the biotype was dolichofacial in 72.8% and mesofacial in 27.2% of the population; by sex, dolichofacial was found in 63.5% of females and 82.4% of males. The Kappa value for concordance between the morphological facial index and the facial opening angle was -0.013. It was concluded that there was no concordance between the morphological facial index and the facial opening angle in determining the facial biotype