Comparison between the use of arch transpalatal bar and continuous NiTi alloys for molars rotation

• Grant number: 14/18946-0
• Support Opportunities: Regular Research Grants
• Start date: March 01, 2015
• End date: February 28, 2017
• Field of knowledge: Health Sciences - Dentistry - Orthodontics
• Principal Investigator: Luiz Gonzaga Gandini Júnior
• Grantee: Luiz Gonzaga Gandini Júnior
• Host Institution: Faculdade de Odontologia (FOAr). Universidade Estadual Paulista (UNESP). Campus de Araraquara. Araraquara , SP, Brazil
• Associated researchers: Lídia Parsekian Martins ; Luegya Knop Shintcovsk ; Renato Parsekian Martins

Abstract

It is quite common rotation of the upper first molars in Orthodontic Clinic. Consequently, there is a trend to Class II molar relationship and loss perimeter of the dental arch. For correction of this malocclusion, two techniques are employed, the Segmented Arch Technique (SAT) and the Continuous Arch. In SAT, arch transpalatal bar (ATP) is the most used, and when activated correctly allows gyro-symmetric version of the molars. In the technique of Continuous Arch, Nickel-Titanium (NiTi) alloys are inserted in all teeth of the dental arch. These wires exhibit good shape memory, flexibility, and are indicated in the initial stages of orthodontic treatment. In this technique, the neighboring teeth to the problem teeth are used as anchorage, and as a result more side effects may occur. Thus, this study aims to evaluate and compare three-dimensional (X, Y and Z axes) forces and moments produced by the two techniques (continuous segmented arch x) when used for correction of gyro-version of the first molars. The OFMA device (Orthodontic Force Measuring Apparatus) will be used to measure the three-dimensional orthodontic force system. (AU)