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# Movements with edgewise appliance /certified fixed orthodontic courses by Indian dental academy

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The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and offering a wide range of dental certified courses in different formats.

Indian dental academy provides dental crown & Bridge,rotary endodontics,fixed orthodontics,
Dental implants courses.for details pls visit www.indiandentalacademy.com ,or call
0091-9248678078

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### Transcript

• 4.  Will the crowns move or will the roots move?  Which direction will they move?  Will anchorage loss result?  Will the overbite increase or decrease?  Will spaces open or changes in arch perimeter occur?  Are the inherent reciprocal forces that develop recognized?  How are these forces controlled? www.indiandentalacademy.com
• 5.  The purpose of this article is to describe the fundamental mechanics used in developing incisor torque and to show clinical examples effectively applying the principle of (1) the moment of a couple and (2) the moment of a force. www.indiandentalacademy.com
• 6.  Couple -pair of equal and opposite parallel forces -capable of rotating the tooth around a center of rotation coincident with the center of resistance -cannot move the center of resistance -measured as the magnitude of one of the two equal forces times the distance between the forces -expressed in units, such as gram-millimeters. www.indiandentalacademy.com
• 9.  To evaluate equilibrium forces- insert wire component only in the bracket part where greater moment is placed. The direction of remaining wire part dictates the direction of equilibrating forces on the adjacent part.  The direction and amount of net equilibrium forces result from the amount of net moment created at adjacent brackets. www.indiandentalacademy.com
• 10.  When the two bracket slot-wire axis angles are in the same direction, the moments at each bracket are in the same direction and their equilibrium forces at each bracket are in the same direction.  when the two bracket slot-wire axis angles are oriented in opposite directions, the resulting equilibrium forces at each bracket are in opposite direction and the net equilibrium force is the difference between the larger and smaller force at that tooth.  Point contact at one end www.indiandentalacademy.com
• 11.  Length of the molar tube and the depth of the incisor bracket differ markedly, this difference will modify the moment- this issue deserves further investigation.  It is also possible to activate a torquing arch upside down. www.indiandentalacademy.com
• 12.  Un-cinched  Cinched - "rowboat" effect www.indiandentalacademy.com
• 13.  treatment of an anterior crossbite www.indiandentalacademy.com
• 16. Moment of a force cannot cause a tooth to rotate around its center of resistance because a force always acts to displace the center of resistance in the direction the force www.indiandentalacademy.com
• 17.  So has a center of rotation located somewhere between the center of resistance and infinity determined by the moment to force ratio present.  In this ratio, the moment is the algebraic combination of all moments arising from the forces or couples acting to rotate the tooth. www.indiandentalacademy.com