MECHANICS AND MATHEMATICAL MODELING OF CLASS III TREATMENT WITH ORTHODONTIC APPLIANCES WITH A MOVABLE RAMP

Petro Flis, Alexander Grigorenko, Nataliia Doroshenko, Mykola Tormakhov, Valeriy Filonenko

Abstract


Treatment of class III is a current problem in orthodontics that requires constant improvement of its methods, development of new or modifications of known methods and techniques. We have developed and studied the modification of removable functionally-directing orthodontic appliances for treatment of Class III, which consists of a plastic base, vestibular arc, retaining clasps, ramp, which is connected with the base by means of two torsion springs. Its usage ensures a prolonged contact of ramp with the teeth.
We studied two types of club-shaped springs (torsion springs): one spring, which create an amortization effect during the action of the ramp, but do not change its inclination angle and second one – spring that seek to increase the angle of the ramp inclination due to the disclosure of its curl.


Keywords


orthodontic forces; movable ramp; club-shaped springs; rigidity of orthodontic appliances

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References


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DOI: http://dx.doi.org/10.21303/2504-5679.2016.00094

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Copyright (c) 2016 Petro Flis, Alexander Grigorenko, Nataliia Doroshenko, Mykola Tormakhov, Valeriy Filonenko

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ISSN 2504-5679 (Online), ISSN 2504-5660 (Print)