Changes in electromyographical activity during different phases of orthodontic treatment: pilot study results
Autor(es)
Rodríguez Castañeda, Claudia Ivonne Cruz Hervert, Luis Pablo Llamosas Hernández, Eduardo Elías Viñas, David García Espinosa, Luis Antonio Pacheco Guerrero, Nicolás Morales González, Julio Ángeles Medina, Fernando
Universidad Nacional Autónoma de México. Facultad de Odontología
Resumen
Electromyography is a useful tool in orthodontics to evaluate and monitor muscle activity for diagnosis and during treatment Objectives: The aim of this study was to determine changes in electric muscular activity during different phases of orthodontic treatment. Material and methods: We performed a cohort study and measured bilateral electromyographic activity (EMG) for 30 seconds in maximum intercuspation. EMG activity was measured monthly for 15 months during 4 phases in orthodontic treatment: preatreatment (P0), splint wear (P1); leveling and aligning (P2); space closure (P3); and fi nishing stage (P4). EMG was measured using a digital electromyograph developed by our group (hardware and software) to determine μV every 0.002 seconds. The root mean square (RMS) value was estimated as a mean value of EGM. Patients were treated at the Orthodontics Department and the Physiology Laboratory of UNAM during 2014-2016. We performed a descriptive, bivariate analysis and a random effects linear regression model for repeated measurements adjusted by age, gender, malocclusion and extractions. Results: Our pilot study included 10 patients (6 female and 4 male); mean age was 20 years. At baseline, maximum median EMG was recorded (median 239 μV, IQR 143 μV-561 μV), Multivariate analysis showed that EMG measurements decreased at P1 (regression coeffi cient [Coef]. -180.97; 95% CI -330.37, -31.56; p = 0.018), P3 (Coef. -168; 95% CI -332.36; -3.76; p = 0.045) and P4 (Coef. -184.21; 95% CI -326.91, -41.5; p = 0.011). Conclusions: EMG changes decreased randomly during orthodontic phases and not constantly as generally believed.
Rodríguez Castañeda, Claudia Ivonne, et al. (2017). Changes in electromyographical activity during different phases of orthodontic treatment: pilot study results. Revista Mexicana de Ortodoncia; Vol. 5 Núm. 4, 2017.
Derechos
La titularidad de los derechos patrimoniales de esta obra pertenece a las instituciones editoras. Su uso se rige por una licencia Creative Commons BY-NC-ND 4.0 Internacional, https://creativecommons.org/licenses/by-nc-nd/4.0/legalcode.es, fecha de asignación de la licencia 2018-02-06, para un uso diferente consultar al responsable jurídico del repositorio por medio del correo electrónico revistamexicanadeortodoncia@gmail.com