We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Comparison of frictional resistance between self-ligating and conventional brackets tied with elastomeric and metal ligature in orthodontic archwires.
- Authors
Vieira Leite, Vanessa; Lopes, Murilo Baena; Júnior, Alcides Gonini; Rodrigues de Almeida, Marcio; Moura, Sandra Kiss; Rodrigues de Almeida, Renato
- Abstract
Objective: To compare the frictional resistance between self-ligating and conventional brackets tied to different types of wire. Material and Methods: Abzil Kirium Capelozza (Pattern I) and Easy Clip (Roth prescription) incisor brackets were used. An elastomeric ligature or a ligating wire 0.10-in was used to ligate the wire to the Abzil bracket. Three types of orthodontic archwire alloys were assessed: 0.016-in NiTi wire, 0.016 x 0.021-in NiTi wire and 0.019 x 0.025-in steel wire. Ten observations were carried out for each bracket-archwire angulation combination. Brackets were mounted in a special appliance, positioned at 90 degrees in relation to the wire and tested in two angulations. Frictional test was performed in a Universal Testing Machine at 5 mm/min and 10 mm of displacement. The means (MPa) were submitted to ANOVA and Tukey's test set at 5% of significance. The surfaces of wires and brackets were observed at SEM. Results: Steel-tied brackets (16.48 ± 8.31) showed higher means of frictional resistance than elastomeric-tied brackets (4.29 ± 2.16 ) and self-ligating brackets (1.66 ± 1.57) (P < 0.05), which also differed from each other (P < 0.05). As for the type of wire, 0.019 x 0.025-in steel wire (5.67 ± 3.97) showed lower means (P < 0.05) than 0.16-in NiTi wire (8.26 ± 10.92) and 0.016 x 0.021-in NiTi wire (8.51 ± 7.95), which did not differ from each other (P > 0.05). No statistical differences (P > 0.05) were found between zero (7.76 ± 8.46) and five-degree (7.19 ± 7.93) angulations. Conclusions: Friction was influenced not only by the type of bracket, but also by the ligating systems. Different morpho- logical aspects were observed for the brackets and wires studied
- Subjects
ORTHODONTIC appliances; FRICTION; INCISORS; WIRE; DENTAL equipment; ORTHODONTICS
- Publication
Dental Press Journal of Orthodontics, 2014, Vol 19, Issue 3, p114
- ISSN
2176-9451
- Publication type
Article
- DOI
10.1590/2176-9451.19.3.114-119.oar