Impact of the prefabricated forms of NiTi archwires on orthodontic forces delivered to the mandibular dental arch

Abstract Background Although preformed archwires with a variety of arch forms are currently commercially available, the effects of variation in the shape of these archwires on the orthodontic force at each tooth are not well understood. Therefore, we evaluated the forces delivered by various types o...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Akihiko Tachi, Keisuke Tochigi, Naomi Saze, Kazuhito Arai
Formato:	article
Lenguaje:	EN
Publicado:	SpringerOpen 2021
Materias:	Preformed archwire Arch form Orthodontic force Archwire classification Dentistry RK1-715
Acceso en línea:	https://doaj.org/article/fca658a3dc72450bb2af338a8db6e6a2
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:fca658a3dc72450bb2af338a8db6e6a2
record_format	dspace
spelling	oai:doaj.org-article:fca658a3dc72450bb2af338a8db6e6a22021-12-05T12:16:50ZImpact of the prefabricated forms of NiTi archwires on orthodontic forces delivered to the mandibular dental arch10.1186/s40510-021-00385-12196-1042https://doaj.org/article/fca658a3dc72450bb2af338a8db6e6a22021-12-01T00:00:00Zhttps://doi.org/10.1186/s40510-021-00385-1https://doaj.org/toc/2196-1042Abstract Background Although preformed archwires with a variety of arch forms are currently commercially available, the effects of variation in the shape of these archwires on the orthodontic force at each tooth are not well understood. Therefore, we evaluated the forces delivered by various types of commercially available preformed nickel–titanium alloy (NiTi) archwires in a simulated mandibular dental arch. Methods Sixty-three types of 0.019 × 0.025-inch preformed NiTi archwires from 15 manufactures were selected for analysis. The intercanine width (ICW) and intermolar width (IMW) of each archwire were measured at the mean canine and first molar depths of 30 untreated subjects with normal occlusions. Each archwire was placed in a multi-sensor measurement system simulating the mandibular dental arch of subjects with normal occlusions, and orthodontic forces in the facial-lingual direction at the central incisors, canines, and first molars were measured. Correlations between the ICW, IMW, and ICW/IMW ratio of archwires and the delivered forces were analyzed. The archwires were classified into the following four groups according to the ICW and IMW: Control group, ICW and IMW are within the means ± standard deviations of the normal ranges; Ovoid group, narrow ICW and IMW; Tapered group, narrow ICW; and Square group, narrow IMW. The forces were compared among these groups for each tooth. Results Significant correlations between the measured archwire width and force to each tooth were found, except between IMW and forces at the central incisors and canines. Significant differences in the forces were found among all groups, except between the Ovoid and Tapered groups at all teeth and between the Ovoid/Tapered and Control groups at the first molar. Significantly greater orthodontic forces in the facial direction were delivered at the central incisors by the archwires in the Ovoid and Tapered groups when compared with the archwires in the other groups. Conclusion These findings suggest that there is a possible risk of a clinically significant level of unfavorable orthodontic force being delivered to the mandibular incisors in labial inclination when using a preformed archwire with an ICW that is narrower than the dental arch.Akihiko TachiKeisuke TochigiNaomi SazeKazuhito AraiSpringerOpenarticlePreformed archwireArch formOrthodontic forceArchwire classificationDentistryRK1-715ENProgress in Orthodontics, Vol 22, Iss 1, Pp 1-12 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Preformed archwire Arch form Orthodontic force Archwire classification Dentistry RK1-715
spellingShingle	Preformed archwire Arch form Orthodontic force Archwire classification Dentistry RK1-715 Akihiko Tachi Keisuke Tochigi Naomi Saze Kazuhito Arai Impact of the prefabricated forms of NiTi archwires on orthodontic forces delivered to the mandibular dental arch
description	Abstract Background Although preformed archwires with a variety of arch forms are currently commercially available, the effects of variation in the shape of these archwires on the orthodontic force at each tooth are not well understood. Therefore, we evaluated the forces delivered by various types of commercially available preformed nickel–titanium alloy (NiTi) archwires in a simulated mandibular dental arch. Methods Sixty-three types of 0.019 × 0.025-inch preformed NiTi archwires from 15 manufactures were selected for analysis. The intercanine width (ICW) and intermolar width (IMW) of each archwire were measured at the mean canine and first molar depths of 30 untreated subjects with normal occlusions. Each archwire was placed in a multi-sensor measurement system simulating the mandibular dental arch of subjects with normal occlusions, and orthodontic forces in the facial-lingual direction at the central incisors, canines, and first molars were measured. Correlations between the ICW, IMW, and ICW/IMW ratio of archwires and the delivered forces were analyzed. The archwires were classified into the following four groups according to the ICW and IMW: Control group, ICW and IMW are within the means ± standard deviations of the normal ranges; Ovoid group, narrow ICW and IMW; Tapered group, narrow ICW; and Square group, narrow IMW. The forces were compared among these groups for each tooth. Results Significant correlations between the measured archwire width and force to each tooth were found, except between IMW and forces at the central incisors and canines. Significant differences in the forces were found among all groups, except between the Ovoid and Tapered groups at all teeth and between the Ovoid/Tapered and Control groups at the first molar. Significantly greater orthodontic forces in the facial direction were delivered at the central incisors by the archwires in the Ovoid and Tapered groups when compared with the archwires in the other groups. Conclusion These findings suggest that there is a possible risk of a clinically significant level of unfavorable orthodontic force being delivered to the mandibular incisors in labial inclination when using a preformed archwire with an ICW that is narrower than the dental arch.
format	article
author	Akihiko Tachi Keisuke Tochigi Naomi Saze Kazuhito Arai
author_facet	Akihiko Tachi Keisuke Tochigi Naomi Saze Kazuhito Arai
author_sort	Akihiko Tachi
title	Impact of the prefabricated forms of NiTi archwires on orthodontic forces delivered to the mandibular dental arch
title_short	Impact of the prefabricated forms of NiTi archwires on orthodontic forces delivered to the mandibular dental arch
title_full	Impact of the prefabricated forms of NiTi archwires on orthodontic forces delivered to the mandibular dental arch
title_fullStr	Impact of the prefabricated forms of NiTi archwires on orthodontic forces delivered to the mandibular dental arch
title_full_unstemmed	Impact of the prefabricated forms of NiTi archwires on orthodontic forces delivered to the mandibular dental arch
title_sort	impact of the prefabricated forms of niti archwires on orthodontic forces delivered to the mandibular dental arch
publisher	SpringerOpen
publishDate	2021
url	https://doaj.org/article/fca658a3dc72450bb2af338a8db6e6a2
work_keys_str_mv	AT akihikotachi impactoftheprefabricatedformsofnitiarchwiresonorthodonticforcesdeliveredtothemandibulardentalarch AT keisuketochigi impactoftheprefabricatedformsofnitiarchwiresonorthodonticforcesdeliveredtothemandibulardentalarch AT naomisaze impactoftheprefabricatedformsofnitiarchwiresonorthodonticforcesdeliveredtothemandibulardentalarch AT kazuhitoarai impactoftheprefabricatedformsofnitiarchwiresonorthodonticforcesdeliveredtothemandibulardentalarch
_version_	1718372112490561536

Impact of the prefabricated forms of NiTi archwires on orthodontic forces delivered to the mandibular dental arch

Ejemplares similares