The stage iii of begg technique /certified fixed orthodontic courses by Indian dental academy


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The stage iii of begg technique /certified fixed orthodontic courses by Indian dental academy

  1. 1. The stage III of Begg Technique Including Problem Management INDIAN DENTAL ACADEMY Leader in continuing dental education
  2. 2. Introduction  Objectives of stage II achieved  Stage III. Stage III unlike Stages I & II – root tipping phase.  Correction of axial inclination of teeth Achieved with torquing and root paralleling auxiliary.  Base arch wire ( Stiffer ) – Retainer
  3. 3. Objectives  Maintaining corrections achieved during Stages 1 & 2.  Edge to edge bite  Anterior and posterior spaces closed.  Aligned anterior teeth.
  4. 4.  Overrotated cuspids/ or bicuspids.  Normal or overcorrected buccolingual relation.  Normal or overcorrected mesiodistal molar reln.  Upright anchor molars.
  5. 5.  Achieving desired axial inclination of all teeth.  Labiolingual  Mesiodistal inclination of incisors. inclination of lateral incisors, cuspids & bicuspids. All objectives are achieved simultaneously.
  6. 6. Need for 3rd stage In Begg technique movement of a tooth from one position to another , Achieved in two phases – Crown tipping. Root torquing or uprighting. VS Bodily movement in Edgewise technique.
  7. 7. In root torquing or uprighting root is moved while crown is more or less stationary Achieved by increasing M:F ratio 12 : 1 so that centre of rotation is incisal or occlusal third. Therefore tooth movements carried out by auxiliaries & archwires are a passive component.
  8. 8. Stage III Appliance.  Base archwires  Torquing auxiliary.  Uprighting spring.  Elastics.
  9. 9. Preparation for Stage III.  Prestage III- for premolar alignment.  Stage models to ensure all stage II objectives are achieved. To demonstrate progress to patient.  Radiographs
  10. 10. Archwire functions. Functions:  Base for deriving forces for the auxiliaries.  Maintain corrections achieved in Stages I & II.  Withstand the reactioary forces generated by the auxiliaries.
  11. 11. Archwire requirements. Sufficient rigidity - to counter reactionary forces. Simple to fabricate – prevents auxiliaries from binding. Easy workability in the mouth.
  12. 12. Archwire material & dimension. 0.020 round special AJW wire. Diameter varies with Upper wires Extn cases – 0.020” If reciprocal torquing is needed for incisors – 0.018”  Non – extn. Cases – 0.018”/ 0.020”  If U/V bend in the midline – 0.020 / 0.022”.  Lower wires – Non extn & some Extn. – 0.018”  If lingual root torquing is needed – 0.020 “ 
  13. 13. Archwire shape and form.  Maxillary archwire Similar to stage wire. Has few modifications –  Anchorage bends reduced or removed - to prevent distal tipping of max. molars. - bite has already opened.  Elimination of premolar offset and placement of molar offset, 1 – 2 mm mesial to the molar tube.
  14. 14.  Ant. segment of archwire will lie much more gingivally than posterior segment , correct it with no. 442 pliers.  Placement of a ‘V’ bend distal to canine to counteract – extrusive component of torquing on central incisors. intrusive component of uprighting springs , torquing aux. on premolars & cuspids. Anterior segment should lie against the gingival margin of the central incisors.
  15. 15.  Constricted post. segment with toe in bend To counteract buccal flaring of & distobucal rotation of molars due to cinching of archwires.  Amount of constriction –   size of the base arch. Degree & duration. of incisor torque needed. Archwire lie on buccal cusp tips in molar area.
  16. 16.
  17. 17. Mandibular Archwire. Similar to stage I Modifications –  Replacements of premolar offsets with molar offsets.  ‘V’bend distal to cuspid but resulting gingival bow flattened out in the incisor area.
  18. 18.  Anchor bends reduced.  Expansion in post. segment  IMH – 0.5 mm mesial to the cuspid bracket.  Vertical step up bends mesial to the molar tube. to 3 mm / side.
  19. 19.
  20. 20. Torquing auxiliaries. Mainly used to torque roots of max. incisors lingually. Indicated in :  Mild discrepancy cases.  Severe discrepancy cases – in lower arch also.  some non – extn. cases.
  21. 21. Types Torquing archwire.  4 spur torquing auxiliary.  Pre wound / Rat trap  2 spur.  Reciprocal  John Kitchton.  Reverse.
  22. 22. Torquing archwire. Original form spurs bent into main archwire of 0.016 SS. buccal rotation of anchor molars. Separation of torq. Aux. from archwire enables use of stiffer base wires.
  23. 23. 4 spur torquing auxiliary. most popular and simplest. torque palatally roots of four max. central incisors. Made in 0.014 or 0.016 SS. 4 spurs angulated at 45° to the centre of the crown. Adequate length reactionary forces Arms terminate b/w cuspid and bicuspid and ends curled in opp. direction.
  24. 24. Activated by – constricting the aux. keeping the loops 80° to 90° from the vertical. curving the arm in a vertical plane. If curved in a horizontal plane Buccal tipping of the molars & bicuspids. Intrusion of molars and
  25. 25. Action – palatal movement of roots of incisors. Adv. Reactions : Labial Bite movement of crowns of ant. teeth deepening Expanding effect.
  26. 26. Labial movement of antr. Teeth. Some pivotal movement of crown in labial direction unavoidable. Minimized by – cuspid ties. cinching the ends of the archwire. Bite deepening in the central incisor region. Reciprocal action of torquing aux. distorts archwire occlusally.
  27. 27. Expansile effect on posterior segment.
  28. 28. Prewound or Rat trap Aux. 0.014” or 0.016” around – 0.020” base wire. Incisal offset – reciprocating stop for aux. Activation – by meeting the resistance of the stop. Modify to apply reciprocal torque in LI
  29. 29. Advantages: Removal of torque bars form LI doesn’t reduce force on CI. Easier to approach gingival regiomn. Larger contact area with tooth. Easier to engage & no whiplash injury Greater force.
  30. 30. Disadvantages.  Difficulty in fabrication.  Unilateral torquing not possible  Torquing LI without CI & torquing cuspids without LI – not possible.
  31. 31. Two spur torquing Aux. Used when only CI require torquing. Reciprocal torquing Aux. For palatal movement of CI roots & labial movement of LI roots. John Kitchton torquing Aux. Heavy forces exerted Used for 2 or for 4 incisors.
  32. 32. Reverse torquing aux. End of stage III – to reinforce mandibular anchorage. to upright mandibular incisors. 2 types. Udder type – vertical spurs & horizontal segment. bracket engagement only for canine. Individual tooth activation & oral hygiene maintenance – difficult.
  33. 33. Brandt type. buccal arm passes through molar tube distal to canine. Good activation control & easy to maintain hygiene
  34. 34. Factors affecting force exerted by torquing auxiliary. - according to R.L. Neuger  Proportional  Inversely proportional to the size of the circle.  Angulation  Position to the D4 of the wire. of the spurs. of the roots.  Inversely proportional to the intercanine dist.
  35. 35. Uprighting springs Introduced by Dr. Begg in 1961. Consists of stem, helix, lever /active arm & hook. Principle. Energy expended in flexing lever arm stored as potential energy in the coil. During unloading, force produces mechanical couple & root moves because crown is ligated.
  36. 36. Force exerted –  Gauge of the wire.  Angulation  Length  Size  No. of the lever arm. of the lever arm. of the helix. of turns in the helix  Size of the root.
  37. 37. Begg recommended. Gauge Coils. Max. & Mand. Cuspids 0.014 /0.016 2 Max. & Mand. 2nd P.M. 0.014 2 Max. Laterals 0.014 2 Mand. Laterals 0.014 3
  38. 38. Short arm Length of lever arm Long arm Normally used short arm. Short enough – 2 mm gap b/w canine & p.m hooks. M-D widths small – long arm uprighting spring.
  39. 39. Thank you For more details please visit