T m-e appl /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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T m-e appl /certified fixed orthodontic courses by Indian dental academy

  1. 1. INDIAN DENTAL ACADEMY Leader in continuing dental education www.indiandentalacademy.com www.indiandentalacademy.com
  2. 2. THE TWEED-MERRIFIELD EDGEWISE APPLIANCE THE BRACKETS AND THE TUBES ARCHWIRES FIRST,SECOND, AND THIRD ORDER BENDS THE AUXILLARIES www.indiandentalacademy.com
  3. 3. THE EVOLUTION OF THE EDGEWISE BRACKET  It started in 1916, in the form of ribbonarch bracket as devised by Dr.E.H.Angle.  Although it became very popular at that time,- deficiencies: It could not control tooth movement in all three planes.  Root control was not up to expectations www.indiandentalacademy.com
  4. 4.  Modify the bracket – in 1925 – the Edgewise bracket.  Slot orientation was changed from vertical to horizontal, Rectangular wire oriented 90° to the orientation it had in the ribbon arch.  Initially referred to as “open face” or “tiebracket”.  Slot – soft gold with a 0.022” x 0.028”. www.indiandentalacademy.com
  5. 5. The appliance has all the characteristics- Simplicity  Efficiency  Comfort  Hygienic  Esthetic  www.indiandentalacademy.com
  6. 6. Neutral 0.022” edgewise slots with double width brackets on the six anterior teeth, intermediate single width brackets on premolar teeth, twin brackets on first molars, 0.022” tubes with mesial hooks on second molars. Lingual hooks on molars and lingual cleats on premolars. No tips, torque, or any variation in thickness in bracket or the neutral slot. www.indiandentalacademy.com
  7. 7. ARCHWIRES  Resilient edgewise arch wires  0.017” x 0.022”, 0.018” x 0.025”, 0.019” x 0.025”, 0.020” x 0.025”, 0.0215” x 0.028”. www.indiandentalacademy.com
  8. 8. FIRST, SECOND, THIRD ORDER BENDS FIRST ORDER BENDS Affect expansion or contraction SECOND ORDER BENDS  In mandibular A/w – antagonistic to anterior teeth  In maxillary A/w – complementary to the anterior segment.  www.indiandentalacademy.com
  9. 9. THIRD ORDER BENDS Objective – some degree of lingual crown torque in mandibular teeth & maxillary posterior teeth ; and some degree of lingual root torque in maxillary anterior teeth. Third order bends in mandibular A/W : Incisors: -7°  -Canines & 1st premolars : -12°  2nd premolars & molars :- -2° Third order bends in maxillary A/W :  Incisors: 0°  Canines & 1st premolars : -7°  2nd premolars & molars :- -12°  www.indiandentalacademy.com
  10. 10. AUXILLARIES  Elastics and headgear www.indiandentalacademy.com
  11. 11. Thank you For more details please visit www.indiandentalacademy.com www.indiandentalacademy.com

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