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http://hdl.handle.net/1843/50390| Type: | Artigo de Periódico |
| Title: | Comparison of the force released by intermaxillary elastics used for different time periods |
| Authors: | Andressa Tribulato Lopes Nitrini Adenilson Silva Chagas Karina Maria Salvatore de Freitas Fabrício Pinelli Valarelli Rodrigo Hermont Cançado Renata Cristina Gobbi de Oliveira Ricardo Cesar Gobbi de Oliveira |
| Abstract: | Objective: The objective of the present study was to compare the strength degradation of the force of intermaxillary elastic used for different periods. Methods: The sample included intermaxillary elastics used for 20 adult patients with bilateral Class II or III malocclusion in orthodontic treatment with fixed appliances, with a mean age of 27.25 years. Latex orthodontic elastics with 3/16 inch of diameter were used, with an average stretching of three times its diameter. The elastics were used in the same patient bilaterally for different periods, with each pair of elastics used for 1, 12, 24, and 48h. Thus, the sample consisted of 200 elastics, with 40 being used in each period (one pair used by each patient) and 40 new elastics without use tested as control. Elastics were tested using a universal testing machine, stretched with a velocity of 30 mm/min, and the force was evaluated in stretches of 15, 20, 25, and 30 mm. The degradation force was compared in the four different times of use and control by one-way ANOVA (analysis of variance) and Tukey tests. Results: There were significant differences among the groups in all evaluated stretches (15, 20, 25, and 30 mm). The control elastics presented higher average forces numerically and statistically significant for all tested times, except for the elastic used for 1h. The elastics used for 1, 12, and 24h had similar forces among them, with a significant difference to the elastics used for 48h. Conclusion: It is recommended to change the intermaxillary elastics after 24 h of use |
| Subject: | Orthodontic appliances Materials testing Dental materials Elastomers Orthodontics Malocclusion angle class iii Malocclusion angle class ii |
| language: | eng |
| metadata.dc.publisher.country: | Brasil |
| Publisher: | Universidade Federal de Minas Gerais |
| Publisher Initials: | UFMG |
| metadata.dc.publisher.department: | FAO - DEPARTAMENTO DE ODONTOLOGIA RESTAURADORA FAO - DEPARTAMENTO DE ODONTOPEDIATRIA E ORTODONTIA |
| Rights: | Acesso Aberto |
| metadata.dc.identifier.doi: | 10.5152/TurkJOrthod.2019.18022 |
| URI: | http://hdl.handle.net/1843/50390 |
| Issue Date: | 1-Dec-2019 |
| metadata.dc.url.externa: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7018489/ |
| metadata.dc.relation.ispartof: | Turkish Journal of Orthodontics |
| Appears in Collections: | Artigo de Periódico |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| Comparison of the force released by intermaxillary elastics used for different time periods.pdf | 776.41 kB | Adobe PDF | View/Open |
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