RESUMEN
One of the biggest controversies in current orthodontics is determining the appliance to use, since today patients seek better results in shorter times, in addition to putting aesthetics first. OBJECTIVE: compare the benefits and disadvantages that arise when using fixed orthodontic appliances and transparent aligners. MATERIALS AND METHODS: An investigation and compilation of specialized bibliographic information on the topic was carried out in scientific search engines such as PubMed, SciElo and Web of Science between the years 1991 to 2023, focused on research work related to the effects of the use of orthodontic appliances. fixed compared to clear aligners. RESULTS: The review was carried out based on 53 articles found that met the selection criteria. CONCLUSION: Fixed orthodontic appliances are better in complex cases, they are more precise and less likely to relapse; Transparent aligners are more aesthetic, hygiene is more affective and the bone density of the mandibular condyle decreases.
RESUMEN
RESUMEN: El propósito del presente estudio fue comparar la degradación de la fuerza entre los elásticos de látex y no látex de 3/16" y 6 oz. La muestra consistió en 30 elásticos por grupo e intervalo de tiempo haciendo un total de 180 elásticos de látex y 180 de no látex. Se midió la fuerza inicial de 30 elásticos de látex y 30 de no látex. Los demás fueron sometidos a tracción estática bajo condiciones orales de humedad y temperatura por 1, 3, 6, 12 y 24 horas antes de la medición de la fuerza con un dinamómetro (Correx 250 g, Alemania). Se emplearon las pruebas de Friedman, Wilcoxon y la U de Mann-Whitney para determinar si existían diferencias significativas. Se encontró que los elásticos de látex presentaron una degradación media de la fuerza de 13,8 %, 17,4 %, 18,2 %, 21 % y 23,4 % a las 1, 3, 6, 12 y 24 horas, respectivamente. Los elásticos de no látex presentaron una degradación media de la fuerza de 32,5 %, 39,6 %, 44,4 %, 51,1 % y 56% a las 1, 3, 6, 12 y 24 horas, respectivamente. Cuando se compararon los valores hallados entre los dos tipos de elásticos en todos los momentos evaluados se encontraron diferencias estadísticamente significativas (p<0,001). Conclusión: La degradación de la fuerza para los elásticos de látex fue menor al de los elásticos de no látex en todos los intervalos de tiempo.
ABSTRACT: The purpose of this study was to compare the force degradation between latex and non latex elastic 3/16" 6oz. The sample consisted of 30 elastics per group and time interval, 180 latex and 180 non latex elastics were used. The initial force was measured in 30 latex elastics and 30 non latex elastics. Others elastics were subjected to static traction in conditions of humidity and temperature for 1, 3, 6, 12 and 24 hours. The force was measured with a dynamometer (Correx 250 g, Germany). Wilcoxon test and Mann-Whitney test was employed to determine significant differences. The latex elastics showed a mean force degradation of 13.8 % during the first hour, 17.4 % at 3 hours, 18.2 % at 6 hours, 21 % at 12 hours and 23. 4 % at 24 hours. The non elastics latex showed a mean force degradation of 32.5 % during the first hour, 39.6 % at 3 hours, 44.4 % at 6 hours, 51.1 % at 12 hours and 56% at 24 hours. It was concluded that the latex elastics force degradation was less than the non-elastics latex in all times.