"In vitro" study about variables that influence in arch friction with conventional and self-ligating brackets
Autor/a
Moyano Lleixà, Javier
Mases, Laia
Izeta, Telmo
Flores, Teresa
Fernandez-Bozal, Javier
Gil Mur, Francisco Javier
Data de publicació
2019-10-09ISSN
1996-1944
Resum
Many advantages have been described surrounding self-ligating (SL) brackets compared to metallic conventional ligating (CL) brackets, such as: Less total treatment time, alignment efficiency, patient comfort, plaque retention, and low friction. The objective of this in vitro simulation was to know the variables that affect arch displacement in CL and SL brackets—active (ASL) and passive (PSL)—and analyze if static friction values are affected by bracket design, arch wire section, kind of ligature, and use of a friction reducer agent (FRA) in a wet state. Larger values of static friction were found in CL with metallic ligature (ML) (8.01 ± 1.08 N/mm) and elastic ligature (EL) (6.96 ± 0.48 N/mm). Lower values were found in PSL brackets combined with FRA (0.58 ± 0.21 N/mm). The study was carried out using different stereographical models of a maxillary upper right quadrant with canine, first and second premolar, and first molar bonded brackets. A section of 25 mm of 0.019 × 0.025” stainless steel arch with a rectangular section (SS) and hybrid section (HY) was inserted into the different bracket models. Static friction values were collected using a universal test machine in wet conditions and testing the effect of a friction reducer agent (FRA). To assure the reliability of the study, different wire combinations were repeated after two weeks by the same operator and a linear analysis of regression was done. Each bracket model analysis—with the different wires, use of the FRA, and comparison among brackets in similar conditions—was done using an ANOVA test with a confidence interval of 95% and comparative Post-Hoc tests (LSD). In this in vitro simulation we found higher static friction values in CL compared to ASL and PSL. In PSL, lower values were achieved. CL brackets using ML showed the highest static friction values with a great variability. In this setting, the use of HY wires did not reduce static friction values in ASL and PSL, while in CL brackets with EL friction the values were reduced significantly. An FRA combined with ASL reduced significantly static friction values but not with PSL. In the case of CL, the FRA effect was higher with SS and better than with HY wires. ML values were similar to ASL static friction. The direct extrapolation of the results might be inaccurate, since all these findings should be tested clinically to be validated.
Tipus de document
Article
Versió del document
Versió acceptada
Llengua
English
Matèries (CDU)
61 - Medicina
Paraules clau
Fricció
Friction
Fricción
Ortodòncia
Ortodoncia
Orthodontics
Conventional brackets
Brackets
Pàgines
10
Publicat per
MDPI
Col·lecció
12; 20
Publicat a
Materials
Citació
Moyano, Javier; Mases, Laia; Izeta, Telmo; Flores, Teresa; Fernández-Bozal, Javier; Gil Mur, Francesc Xavier; Puigdollers, Andreu. «"In vitro" study about variables that influence in arch friction with conventional and self-ligating brackets». Materials, 2019, vol. 12, núm. 20, art. 3279. Disponible en: <https://www.mdpi.com/1996-1944/12/20/3279>. Fecha de acceso: 25 oct. 2019. DOI: 10.3390/ma12203279
Número de l'acord de la subvenció
info:eu-repo/grantAgreement/MICINN/RTI2018-098075-B-C22
Nota
This article belongs to the Special Issue Orthodontic Materials and Adhesive Interfaces
Aquest element apareix en la col·lecció o col·leccions següent(s)
- Odontologia [242]
Drets
http://creativecommons.org/licenses/by-nc-nd/4.0/
Excepte que s'indiqui una altra cosa, la llicència de l'ítem es descriu com http://creativecommons.org/licenses/by-nc-nd/4.0/