Abstract
Retraction spring is a type of orthodontic apparatus that is used to move a tooth with respect to another by utilizing its spring back effect. It is made of metallic wire formed to individual orthodontic cases. A specific geometry results in a set of force system, consisting of forces and moments, that provides specific movement effect when it is pre-activated to the adjacent teeth. Currently, orthodontists select its geometry depending on their knowledge and experience. It is based on separate and less-than-comprehensive literatures that not all orthodontists have access to. It may result in inaccuracies in treating individual tooth retraction case. Engineering approach to estimating retraction spring structural behavior is proposed through analytical, numerical and empirical methods. Castigliano method is used as the analytical approach, whilst finite element method is used as the numerical approach. The two simulation approaches were compared to the experiments to obtain the best simulation model. The behavior of the simulation models agree well with those of experiments. Hence, the simulation models were used to simulate a large number of geometries to form database of structural behavior of retraction spring that could be used in the geometry selection by orthodontists. Orthodontic is a specialty of dentistry that is concerned with the study and treatment of malocclusions (improper teeth arrangement). It may be caused by a result of tooth irregularity ordisproportionate jaw. Retraction spring is a type of orthodontic device used for correcting the tooth position using the reaction force of the pre-tensioned spring. Certain geometry of the spring forms a certain system of forces that allows certain dental movement. With the correct selection, the treatment will take place more accurately and reducing the side- effect to the patients. In order to do so, an orthodontist selects the geometry of the retraction spring based on his/her knowledge and experience, as well as literatures. Then, a piece of raw orthodontic wire is formed to the geometry manually. The wire can be of Stainless steel (SS), Titanium molybdenum alloy (TMA), or Nickel Titanium alloy (NiTi). Manual selection and production of
Published Version (
Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
