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Background. There are several invasive dental procedures that require local anesthetics. However, its infiltration is usually associated with anxiety and fear, increasing the perception of pain in pediatric patients. For this reason, it is important to evaluate different strategies for its application. We compared the anesthetic effect of the administration of 2% lidocaine with epinephrine 1:80000 non-alkalized at slow speed and alkalized at fast speed to block the inferior alveolar nerve in deciduous molars. Methods. A crossover clinical trial was carried out whose sample consisted of 38 patients between 6-10 years who required bilateral pulp treatment in their first mandibular primary molars. At the first appointment, they received 2% lidocaine with 1:80000 alkalinized epinephrine administered at a fast rate, and at the second appointment, 2% lidocaine with 1:80000 non-alkalized epinephrine administered at a low speed. We evaluated the onset of action, duration of the anesthetic effect, and intensity of pain during its infiltration. Results. We found that non-alkalized lidocaine at slow speed had a shorter onset time of action (57.21±22.21 seconds) and longer duration of effect (170.82±43.75 minutes) compared to administration of alkalinized lidocaine at fast speed (74.03±22.09 seconds, 148.24±36.24 minutes, respectively). There was no difference in the level of pain intensity. Conclusion. In this study, the slow administration of the non-alkalized local anesthetic showed a shorter onset time of action and a longer duration of the anesthetic effect in comparison with the alkalized local anesthetic administered at a rapid rate in the blockade of the inferior alveolar nerve in deciduous molars.

Resumen: El presente estudio tuvo como objetivo conocer la producción científica y la percepción sobre la investigación que tienen los estudiantes universitarios. Materiales y métodos: Estudio descriptivo y retrospectivo que incluyó a 144 estudiantes del pregrado de la Facultad de Odontología de la Universidad Nacional Mayor de San Marcos (Lima, Perú) a quienes se les entregó un cuestionario estructurado con las variables de producción académica/científica y la autopercepción que tienen sobre los conocimientos de metodología de la investigación, redacción de artículos y búsqueda de la información. Resultados: Con un promedio de edad de 21,1 ± 2,3 años, solo 5 (3,5%) estudiantes informaron haber publicado y/o colaborado en al menos un artículo científico. El 77,1% considera importante la producción científica como medio para aumentar el conocimiento científico. El 47,2% considera como regular su conocimiento sobre redacción de artículos científicos y un 55,6% posee la misma autopercepción respecto a la búsqueda de la información académica/científica. Conclusión: Se puede concluir que la producción científica de los estudiantes es muy baja, y que la mayoría de ellos percibe como regular sus conocimientos relacionados con metodología de la investigación, redacción científica y búsqueda de la información. Abstract: The aim of this study is to determine the scientific production and perception of research in university students. Materials and methods: A descriptive, retrospective study was designed and included 144 undergraduate students of the Faculty of Dentistry, National University of San Marcos (Lima. Peru). A structured questionnaire was administered, with items such as academic/scientific production and the self-perception they have on knowledge of research methodology, article writing, and information searches. Results: The mean age of the students was 21.1 ± 2.3 years, with only 5 (3.47%) students reported having published and/or contributed to at least one scientific article. More than three-quarters (77.1%) considered scientific production important as a means to increase scientific knowledge. Less than half (47.2%) considered that they had average knowledge about writing scientific articles, and 55.6% had the same perception about academic/scientific search information. Conclusion: It can be concluded that the scientific production of students is very low, and most of them perceived they have average knowledge of research methodology, scientific writing, and information search skills. Palabras clave: Comunicación y divulgación científica, Bibliometría, Odontología, Perú, Keywords: Scientific communication and diffusion, Bibliometrics, Dentistry, Peru