Factors affecting tooth movement in sliding mechanics

Autor: J. C. Moore, N. E. Waters
Rok vydání: 1993
Předmět:
Zdroj: The European Journal of Orthodontics. 15:235-241
ISSN: 1460-2210
0141-5387
DOI: 10.1093/ejo/15.3.235
Popis: The force system operating between bracket and wire in sliding mechanics has been examined analytically using simple beam theory with the object of providing further information on the cause of bracket binding. The results were checked on an enlarged model system, and satisfactory agreement between experiment and theory was obtained. It is shown that for a given bracket tip the restoring couple varies not only with the flexural rigidity (EI) of the wire, the bracket width and span length, but also with the position of the bracket along the span. In addition, as tipping occurs a net vertical force is brought into play which is initially intrusive, but becomes extrusive as retraction proceeds.
Databáze: OpenAIRE
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