Examinando por Autor "Vásquez Rodrigo, Hernán"

Mostrando 1 - 5 de 5

Acceso abierto
Comparison of the flexural strength of a nanohybrid resin and a Bulk Fill type resin. In Vitro Study. Lima - Peru 2021.
(Universidad Privada Norbert Wiener, 2022-05-05) Cruz Huaman, Iris; Vásquez Rodrigo, Hernán
Two resins were used, a microhybrid (Filtek™ Z250XT – 3M Espe) and a bulk fill type (Filtek™ Z250XT – 3M Espe). These resins were used to form resin bars of 60 mm in length, 10 mm in width, and 2 and 4 mm in thickness. The resin bars were formed with the help of two metal molds of the specified dimensions, differing only in thickness, one mold with 2 mm thickness and the other with 4 mm thickness. In the 2 mm thickness mold, the resin bars were formed with 2 mm increments until the resin bar was completed, while in the 4 mm thickness mold, the resin bars were formed with 4 mm increments. Once the resin bars were formed, they were taken to the mechanical testing laboratory for the flexural strength test, where each resin bar was individually placed on a metal structure with two equidistant supports at the base. A metal piece was then lowered at the center of the resin bar to test its flexion under compressive load, advancing at 1 mm/min until the material fractured, with data recorded electronically by the same equipment. Results: The results showed that the flexural strength of the nanohybrid resin with 4 mm increments was 113.89 ± 27.94 Megapascals. This was followed by the bulk fill resin with 2 mm increments (109.69 ± 75.60 Megapascals), then the nanohybrid resin with 2 mm increments (93.87 ± 15.97 Megapascals), and lastly, the bulk fill resin with 4 mm increments (75.60 ± 5.88 Megapascals). Conclusion: The highest flexural strength of the resins was found in the microhybrid resin Filtek™ Z250XT with 4 mm increments, followed by the flexural strength of the Filtek™ Bulk Fill resin with 2 mm increments. This was followed by the flexural strength of the Filtek™ Z250XT resin with 2 mm increments, and lastly, the Filtek™ Bulk Fill resin with 4 mm increments.
Acceso abierto
Factores asociados y severidad de recesiones gingivales en pacientes de la clínica de la Universidad Norbert Wiener, Lima 2025
(Universidad Privada Norbert Wiener, 2025-12-02) Olivares Arones, Anabel Rosa; Vásquez Rodrigo, Hernán
Introducción: La recesión gingival es una condición clínica frecuente que, pese a su prevalencia, suele pasar desapercibida. Se caracteriza por el desplazamiento del margen gingival hacia apical, exponiendo la superficie radicular del diente. Esta alteración, que puede afectar tanto la estética como la salud bucal y representa un problema de salud pública, dado que, distintos estudios revelan que más de 50% de las personas manifiestan al menos un área afectada por recesión gingival. Objetivo: “Determinar la relación entre los factores asociados con la severidad de recesiones gingivales en pacientes de la clínica de la Universidad Norbert Wiener, Lima 2025”. Metodología: Fue planteando a través del método hipotético deductivo, enfoque cuantitativo, de tipo aplicada, no experimental, correlacional y transaccional. La muestra seleccionada fueron 95 pacientes. Los instrumentos empleados fueron: la ficha de registro de factores asociados y la de recesión gingival según MILLER, y su confiabilidad es de 0.781 y 0.674. Resultados: Se encontró relación estadísticamente significativa (p < 0.05) entre la severidad de las recesiones gingivales y los factores placa (p = 0.001), cálculos dentarios (p = 0.000), iatrogenia (p = 0.007) y cepillado traumático (p = 0.024). No se evidenció asociación significativa con edad, sexo ni frenillos de inserción larga (p > 0.05). Conclusiones: Los hallazgos estadísticos mostraron una conexión significativa entre la severidad de la recesión gingival y factores locales, destacando la placa, cálculos, iatrogenia y cepillado traumático. Lo que señala influencia directa en el desarrollo de esta condición periodontal.
Acceso abierto
In vitro study of the dimensional stability in models using condensation silicone according to emptying times
(Universidad Privada Norbert Wiener, 2023-01-17) Narvaez Alvarado, Elizabeth Cristina; Vásquez Rodrigo, Hernán
The objective of this research was to compare in vitro the dimensional stability of impressions made with condensation silicone on plaster models using three spaced pouring times, based on a stainless steel master model. This is an experimental study in which 30 impressions were made on a stainless steel master model using Speedex Putty condensation silicone, and they were divided into 3 groups: 10 impressions at 30 minutes, 10 impressions at 60 minutes, and 10 impressions at 24 hours. To assess dimensional stability, a specialized coordinate machine, Duramax 5/5/5 with ZEISS (Germany) contact scanning technology, was used to measure 6 locations (A, B, C, D, E, and Angle measurement). The results showed, through ANOVA statistical analysis, that there were significant differences between the pouring times of 30 minutes and 24 hours in measurements A, B, and the Angle measurement. In conclusion, it was demonstrated that there is less dimensional alteration in definitive plaster models poured at 30 minutes, as evidenced by Measurements C, D, E, and the Angle measurement. Regarding the 60-minute pouring time, greater dimensional stability was found only in Measurements A and B. On the other hand, the 24-hour pouring time showed the greatest dimensional variation compared to the 30 and 60-minute pouring times.
Acceso abierto
level of knowledge about oral hygiene practices in health professionals of the sesquicentennial micronetwork in covid-19 times
(Universidad Privada Norbert Wiener, 2023-07-04) Guadalupe Romero, Elvia Jheny; Vásquez Rodrigo, Hernán
The objective of this research was to determine the level of knowledge regarding oral hygiene practices among healthcare professionals in the Sesquicentenario Micro-network of Diresa Callao in the face of the new coronavirus. This was a descriptive and cross-sectional study. The instrument, previously validated by expert judgment, consisted of 15 questions with various alternatives related to knowledge of oral hygiene practices, applied to a population of 100 healthcare professionals in a face-to-face setting. The results indicated that the knowledge level regarding oral hygiene practices was good (49%), regular (37%), and poor (14%). It was observed that females presented a good knowledge level (40%), compared to males, who had a poor knowledge level (9%), with a statistically significant association. In the age group of 31 to 40 years, 20% had good knowledge. Regarding educational level, those with higher education mostly showed a regular knowledge level (32%). Among those with 1 to 5 years of service, most had a regular knowledge level (25%). No statistically significant associations were found for these factors. Conclusion: The knowledge level regarding oral hygiene practices among healthcare professionals in the Sesquicentenario Micro-network during the COVID-19 pandemic was good for the majority of the participants.
Acceso abierto
Relationship of workload and self-perception of oral health in nursing graduates on the front line of Covid-19 care in Metropolitan Lima, 2021
(Universidad Privada Norbert Wiener, 2022-11-15) Palomino Requena, Roberto Ruben; Vásquez Rodrigo, Hernán
The objective of this research is to compare in vitro the dimensional stability of impressions made with condensation silicone on plaster models using three spaced pouring times, based on a master model made of stainless steel. This is an experimental study, where 30 impressions were made on a stainless steel master model using Speedex Putty condensation silicone, divided into 3 groups according to pouring times: 10 impressions at 30 minutes, 10 impressions at 60 minutes, and 10 impressions at 24 hours. To establish dimensional stability, a Duramax 5/5/5 coordinate machine with ZEISS (Germany) contact scanning technology was used, where six locations (A, B, C, D, E, and Angle measurement) were measured. Statistical analysis using ANOVA showed significant differences between the pouring times of 30 minutes and 24 hours in measurements A, B, and the Angle measurement. In conclusion, it was demonstrated that there is less dimensional alteration in definitive models poured in plaster at 30 minutes, as evidenced by Measurements C, D, E, and the Angle measurement. In relation to the pouring time of 60 minutes, greater dimensional stability was only found in Measurements A and B. On the other hand, the 24-hour pouring time showed the greatest dimensional variation compared to the 30 and 60-minute pouring times.