Reicheneder, Claudia A. and Gedrange, T. and Berrisch, S. and Proff, P. and Baumert, U. and Faltermeier, A. and Muessig, D. (2008) Conventionally ligated versus self-ligating metal brackets-a comparative study. EUROPEAN JOURNAL OF ORTHODONTICS, 30 (6). pp. 654-660. ISSN 0141-5387, 1460-2210
Full text not available from this repository. (Request a copy)Abstract
The purpose of this study was to compare the frictional properties of four self-ligating metal brackets, Speed, Damon 2, In-Ovation, and Time, with those of three conventionally ligated metal brackets, Time, Victory Twin, and Discovery. The self-ligating Time bracket can also be used as a conventionally ligated bracket. Friction was tested 20 times for each bracket/wire combination using a Zwick testing machine with stainless steel wires in three different wire dimensions (0.017 x 0.025, 0.018 x 0.025, and 0.019 x 0.025 inches). All brackets had a 0.022 inch slot and the prescription of an upper first premolar. The data were statistically analysed with unsigned comparisons of all bracket/wire combinations using the Mann-Whitney U-test and the Games-Howell post hoc test. The results showed almost all brackets to have the lowest frictional force with a wire dimension of 0.018 x 0.025 inch. Friction of the self-ligating brackets using wire with a dimension of 0.018 x 0.025 inches was 45-48 per cent lower than with 0.017 x 0.025 and 0.019 x 0.025 inch wires. Friction of the conventionally ligated brackets showed a 14 per cent or less reduced friction with 0.018 x 0.025 inch wire compared with 0.017 x 0.025 and 0.019 x 0.025 inch wires. The self-ligating metal brackets showed lower frictional forces with a 0.018 x 0.025 inch wire than conventionally ligated brackets, whereas conventionally ligated brackets showed lower friction with 0.017 x 0.025 and 0.019 x 0.025 inch wire. Friction values vary with different bracket/archwire combinations and, therefore, the choice of a bracket system for treatment should consider the correct wire dimension to produce the lowest possible frictional forces.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | FRICTIONAL FORCES; ORTHODONTIC BRACKETS; ARCH WIRE; IN-VITRO; RESISTANCE; DRY; SIMULATION; ARCHWIRES; DESIGNS; |
| Subjects: | 600 Technology > 610 Medical sciences Medicine |
| Divisions: | Medicine > Lehrstuhl für Kieferorthopädie |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 14 Oct 2020 09:59 |
| Last Modified: | 14 Oct 2020 09:59 |
| URI: | https://pred.uni-regensburg.de/id/eprint/29955 |
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