RJOR - Official publication of Romanian Association of Oral Rehabilitation

Str. Mihail Kogalniceanu No.2, Iasi, Romania



Romanian Journal of Oral Rehabilitation 2012,Numarul 3 Finite Element Analysis for Upper Molar Distalization

Finite Element Analysis for Upper Molar Distalization

Liliana Ioana Vata, Cristel Stirbu, Irina Zetu, Mariana Pacurar

Orthodontic literature indicates that upper molar distalisation is a tipping and extrusion movement, combined with mesio-buccal rotation and buccaly-crown torque, depending on the distalisers used. FEM (finite element method) allow a simulation of force systems which can determine bodily distal molar movement. Using FEM we can also determine the role of second and third molar during upper first molar distalisation movement. This study presents a model of upper first molar, periodontal ligment and alveolar bone using the analysis and design programmes Solidworks2007 and CATIA P3V5R16. Our results using FEM shows that the rotational axis of first molar is displaced when applying a palatal force for distalisation from buccaly – apex to palatal – crown and compressive stress is located on cervical region of distobuccal root. For bodily movement, the moment/force ratio at the molar centre of resistance must be zero, so it is necessary to reduce the moment on the molar band using a counterbalancing couple (CBC) with effects in vertical plane. The displacement of upper molar rotational axis during distalisation is proved by molar rotation and explains the second molar role as a fulcrum, when is not erupted. In conclusion, bodily distal upper molar movement could be obtained only when rotational axis is at infinite and the compressive stress is homogeneously distributed in the periodontal ligament.

Download (PDF, 618KB)

Tags: , , , ,

By continuing to use the site, you agree to the use of cookies || Prin continuarea navigarii pe acest site esti de acord cu utilizarea cookie-urilor more information || mai multe informatii

RJOR.RO utilizeaza fisiere de tip cookie pentru a personaliza si imbunatati experienta ta pe Website-ul nostru. Te informam ca ne-am actualizat politicile pentru a integra in acestea si in activitatea curenta a adre.ro cele mai recente modificari propuse de Regulamentul (UE) 2016/679 privind protectia persoanelor fizice in ceea ce priveste prelucrarea datelor cu caracter personal si privind libera circulatie a acestor date. inainte de a continua navigarea pe Website-ul nostru te rugam sa aloci timpul necesar pentru a citi si intelege continutul Politicii de Cookie. Prin continuarea navigarii pe Website-ul nostru confirmi acceptarea utilizarii fisierelor de tip cookie conform Politicii de Cookie. Nu uita totusi ca poti modifica in orice moment setarile acestor fisiere cookie urmand instructiunile din Politica de Cookie The cookie settings on this website are set to "allow cookies" to give you the best browsing experience possible. If you continue to use this website without changing your cookie settings or you click "Accept" below then you are consenting to this.