Changing Trends in Preadjusted
Edgewise system
INDIAN DENTAL ACADEMY
Leader in continuing dental education
www.indiandenta...
In Andrew’s Original System:
Concerning the 1st
order information: There
is no antirotation system on any tooth, except
a...
Concerning the 3rd
order information:
On the upper arch:
- The upper incisor only has a 7° torque
- The upper canine has ...
www.indiandentalacademy.com
Andrew’s system soon got the reputation
of being an “anchorage burning
appliance” - - -
A torque of 7° on central incisors...
In 1974, Ronold Roth:
Based on anticipation of relapse during and
after treatment came up with his fully
programmed univer...
Concerning the 1st
order information: All
teeth in the buccal segment – anti rotation
system. Upper molars reinforce dist...
Concerning 3rd
order information: The torque
on the upper incisors is increased by 5°
- Torque on the upper canines decrea...
www.indiandentalacademy.com
After Roth, Terrel Root 1981, proposed
‘Level Anchorage’ - Tweed Phylosophy
a. Medium or regular anchorage
b. Maximum or m...
The Mandibular buccal segments are available
with two types of anchorage preparation.
-“ Regular” anchorage with a -4°,-6°...
www.indiandentalacademy.com
www.indiandentalacademy.com
www.indiandentalacademy.com
Wick Alexander :
Combination of Andrew’s and Roth
Hilgers :
- Upper incisors have a considerably
increased torque. 22° for...
www.indiandentalacademy.com
www.indiandentalacademy.com
Bennett and McLaughlin:
-Combination of Andrew’s and Roth with few
changes
- Anti rotation system was removed, all the
mes...
www.indiandentalacademy.com
Ricketts’ Bioprogresive Therapy :
-Modification of Andrew’s and Roth
-The angulation in buccal segment t is 0°
except for ...
www.indiandentalacademy.com
As Summary
-All the above prescriptions globally reflect
the treatment philosophy of their different
authors.
-It will be ...
“Fully Programmed Translation brackets”
by Andrew’s
- These are three sets of information mixed
according to the treatment...
“Minimum translation brackets”
www.indiandentalacademy.com
“Medium Translation Brackets”
www.indiandentalacademy.com
“Maximum Translation Brackets”
www.indiandentalacademy.com
Andrews Roth Alex Root Benett Hilgers
Incisor torque
www.indiandentalacademy.com
Andrews Andrews Roth Alex Root Bennett Hilgers
Max
Canine Position
www.indiandentalacademy.com
Evolution toward facial type
This evolution is also taking place in
cephalometrics where the notion of mean
now tends to b...
SYNERGY INFORMATION SYSTEM –
Rocky Mountain Company: This is
according to the mechanical requirements
depending on facial ...
-On the canines 0° torque for the
dolichofacial and mesofacial and positive
torque for the brachifacial.
- For dolichofaci...
“Dolichofacia”
www.indiandentalacademy.com
“Brachyfacial”
www.indiandentalacademy.com
Swing Towards Facial Patterns
Normally, the dento-alveolar sysem acts as
a buffer between the skeletal bases, and
adjusts ...
Steiner’s recommended U/L incisor positions
relative to line NA & NB and varied according
to ANB angle.
-10
250
7
220
3.25...
Cl. III Cl. I Cl.II Cl. III Cl. I Cl. II Cl. III Cl. I Cl. II
www.indiandentalacademy.com
Maxillary deficiency Normal transverse
relationship
Mandibular deficiency
At the incisor level:
www.indiandentalacademy.com
Hypo-maxillia Normo-transversal Hypo-mandibulie
At the Canine Level
www.indiandentalacademy.com
Maxillary deficiency Normal transverse
relationship
Mandibular deficiency
At the Molar level:
www.indiandentalacademy.com
Thus, In the absence of functional
anomalies:
1. The dento-alveolar compensations
(inclination and angulation) take place ...
2. No matter what technique is used, the
information (torque and angulation) we
apply must also be coherent in the three
p...
•The torque level is high on the
incisors, the angulation values in the
buccal segments, especially on the
canines will be...
In a normodivergent
skeletal pattern with a
Class III tendency on the
upper arch, the high torque
value comes with a highe...
On a normodivergent
Class I skeletal pattern,
coherence of 3rd
order
iformation on the
incisors (torque on
inclinations) w...
On a normodivergent skeletal
pattern with a Class II
tendency, coherence of the 3rd
order information on the
incisors (tor...
In this case, the high torque
level on the incisors doesn’t
come with a sufficient
angulation of the buccal
segments; this...
Here, the high level of
torque on the incisors
comes with a sufficient
canine angulation but an
insufficient angulation of...
In a normodivergent Class
III skeletal pattern, incisor
angulations are less
pronounced, torque in a
buccal segments will ...
In a normodivergent Class I
skeletal pattern, coherence
of 2nd
order incisor
information (angulations)
with the 3rd
inform...
In a normodivergent class
II skeletal pattern, incisor
angulations are more
pronounced, toruqe in the
buccal segments will...
Here, the canine has a positive torque, which is
adopted to the transverse skeletal relationships:
if the torque on the bi...
Class III transversal Class I transversal Class II transversal
www.indiandentalacademy.com
“A normal face is no longer one where
cephalometric values are closest to the
mean, but one whose cephalometric values
sho...
www.indiandentalacademy.com
For more details please visit
www.indiandentalacademy.com
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Changing trends /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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Changing trends /certified fixed orthodontic courses by Indian dental academy

  1. 1. Changing Trends in Preadjusted Edgewise system INDIAN DENTAL ACADEMY Leader in continuing dental education www.indiandentalacademy.com www.indiandentalacademy.com
  2. 2. In Andrew’s Original System: Concerning the 1st order information: There is no antirotation system on any tooth, except a 10° distal offset on upper molars. Concerning the 2nd order information: Teeth of the buccal segments all present a positive angulation, meaning that they all have a mesial crown tip, mostly for the 1st and 2nd upper molars.www.indiandentalacademy.com
  3. 3. Concerning the 3rd order information: On the upper arch: - The upper incisor only has a 7° torque - The upper canine has a negative torque of –7, equal to the torque of the biscuspids. - The torque if slightly greater on molars. On the Lower arch: - The torque on the buccal segments is progressive from the canines to the 2nd molars. www.indiandentalacademy.com
  4. 4. www.indiandentalacademy.com
  5. 5. Andrew’s system soon got the reputation of being an “anchorage burning appliance” - - - A torque of 7° on central incisors was soon found to be insufficient, since the play between archwire and bracket slot, which wasn’t taken into account, creates important loss of information during retraction stages and hence the amount torque necessary to compensate for the unwanted lingual tipping was clearly greater than 7° www.indiandentalacademy.com
  6. 6. In 1974, Ronold Roth: Based on anticipation of relapse during and after treatment came up with his fully programmed universal appliance. Thus he systematically included the information for over correction in all three planes of space. www.indiandentalacademy.com
  7. 7. Concerning the 1st order information: All teeth in the buccal segment – anti rotation system. Upper molars reinforce distal offset from 10° to 14° and lower molars 4° anti-rotation  Concerning the 2nd order information : Canine angulation increased to 11° to 13° Maxillary buccal segment lose their mesial tip and are in more anchorage situation. www.indiandentalacademy.com
  8. 8. Concerning 3rd order information: The torque on the upper incisors is increased by 5° - Torque on the upper canines decreased by 5° - Torque is markedly greater on molars. (-14° instead of -9°) On the lower arch : - Torque on the buccal segments stays identical to Andrew’s except for a decrease from 35° to 30° on the second molar which decreases the “rolling effect” (lingual tip) sometimes noticed with Andrews’ torque.www.indiandentalacademy.com
  9. 9. www.indiandentalacademy.com
  10. 10. After Roth, Terrel Root 1981, proposed ‘Level Anchorage’ - Tweed Phylosophy a. Medium or regular anchorage b. Maximum or major anchorage Removed Roth’s anti-rotation system and increase the angulation on the lower molars to 10° www.indiandentalacademy.com
  11. 11. The Mandibular buccal segments are available with two types of anchorage preparation. -“ Regular” anchorage with a -4°,-6° and -10° distal tip respectively on the 2nd bicuspid, the 1st molar, and the 2nd molar. - “Major” anchorage with a -6 °, -10 ° and -15 ° distal tip respectively on the 2nd bicuspid, the 1st molar, and the 2nd molar. www.indiandentalacademy.com
  12. 12. www.indiandentalacademy.com
  13. 13. www.indiandentalacademy.com
  14. 14. www.indiandentalacademy.com
  15. 15. Wick Alexander : Combination of Andrew’s and Roth Hilgers : - Upper incisors have a considerably increased torque. 22° for the central incisor, 14 ° for the lateral incisor. - Upper canine has a 7 ° torque, this creates a transverse differential of 14 ° between canine and biscuspid. www.indiandentalacademy.com
  16. 16. www.indiandentalacademy.com
  17. 17. www.indiandentalacademy.com
  18. 18. Bennett and McLaughlin: -Combination of Andrew’s and Roth with few changes - Anti rotation system was removed, all the mesial tip has been removed. -Upper incisors have markedly increased torque of 17 ° and 10 ° and upper canine -7 ° torque. -The torque on the lower incisors increase to www.indiandentalacademy.com
  19. 19. www.indiandentalacademy.com
  20. 20. Ricketts’ Bioprogresive Therapy : -Modification of Andrew’s and Roth -The angulation in buccal segment t is 0° except for mandibular molar with -5° -Upper incisor markedly increased torque 22° for the central, 14° for the lateral -Upper canine has 7° torque www.indiandentalacademy.com
  21. 21. www.indiandentalacademy.com
  22. 22. As Summary -All the above prescriptions globally reflect the treatment philosophy of their different authors. -It will be necessary for the practitioner to complete the programme by adding information to the wire. www.indiandentalacademy.com
  23. 23. “Fully Programmed Translation brackets” by Andrew’s - These are three sets of information mixed according to the treatment needs. -The come in 3 sets bearing values of angulation, torque and anti rotation www.indiandentalacademy.com
  24. 24. “Minimum translation brackets” www.indiandentalacademy.com
  25. 25. “Medium Translation Brackets” www.indiandentalacademy.com
  26. 26. “Maximum Translation Brackets” www.indiandentalacademy.com
  27. 27. Andrews Roth Alex Root Benett Hilgers Incisor torque www.indiandentalacademy.com
  28. 28. Andrews Andrews Roth Alex Root Bennett Hilgers Max Canine Position www.indiandentalacademy.com
  29. 29. Evolution toward facial type This evolution is also taking place in cephalometrics where the notion of mean now tends to be replaced by growth considerations. This corresponds to the need for individualization of information. Since variability in the morphology of the facial skeleton necessarily implies variability in the dento-alveolar compensations. www.indiandentalacademy.com
  30. 30. SYNERGY INFORMATION SYSTEM – Rocky Mountain Company: This is according to the mechanical requirements depending on facial pattern in the vertical dimension. The inclination of the upper incisors varies from 12 ° to 22 ° from dolichofacial to brachifacial while the angulation remains identical for the normofacial www.indiandentalacademy.com
  31. 31. -On the canines 0° torque for the dolichofacial and mesofacial and positive torque for the brachifacial. - For dolichofacial torque values are higher on the molars to prepare an anchorage. -Anti rotation values are markedly increased to 12° on the first molars in mesiofacial and brachyfacial. www.indiandentalacademy.com
  32. 32. “Dolichofacia” www.indiandentalacademy.com
  33. 33. “Brachyfacial” www.indiandentalacademy.com
  34. 34. Swing Towards Facial Patterns Normally, the dento-alveolar sysem acts as a buffer between the skeletal bases, and adjusts for the best according to sagittal vertical and transverse discrepancies. Incorporating dental compensations according to skeletal relationships, facial patterns and growth trends www.indiandentalacademy.com
  35. 35. Steiner’s recommended U/L incisor positions relative to line NA & NB and varied according to ANB angle. -10 250 7 220 3.25 00 240 6 230 3.5 10 230 5 240 3.75 20 220 4 250 4 30 210 3 260 4.25 40 200 2 270 4.5 50 190 1 280 4.75 60 180 0 290 5 70 170 -1 300 5.25 80 160 -2 310 5.5 www.indiandentalacademy.com
  36. 36. Cl. III Cl. I Cl.II Cl. III Cl. I Cl. II Cl. III Cl. I Cl. II www.indiandentalacademy.com
  37. 37. Maxillary deficiency Normal transverse relationship Mandibular deficiency At the incisor level: www.indiandentalacademy.com
  38. 38. Hypo-maxillia Normo-transversal Hypo-mandibulie At the Canine Level www.indiandentalacademy.com
  39. 39. Maxillary deficiency Normal transverse relationship Mandibular deficiency At the Molar level: www.indiandentalacademy.com
  40. 40. Thus, In the absence of functional anomalies: 1. The dento-alveolar compensations (inclination and angulation) take place in a coherent way, in accordance with every single facial type, determined by skeletal relationships, either established in the three planes. www.indiandentalacademy.com
  41. 41. 2. No matter what technique is used, the information (torque and angulation) we apply must also be coherent in the three planes. In the sagittal plane, the inclinations (or torque ) of the incisors must be coordinated with the angulations of the buccal segments in a well balanced dento-alveolar system www.indiandentalacademy.com
  42. 42. •The torque level is high on the incisors, the angulation values in the buccal segments, especially on the canines will be greater. •On the contrary, if the torque level on the incisors is low, the angulations in the buccal segments, especially on the canines, will be smaller. www.indiandentalacademy.com
  43. 43. In a normodivergent skeletal pattern with a Class III tendency on the upper arch, the high torque value comes with a higher positive value of the angulation in the buccal segments from the canine of the second molar. On the lower arch, the lower incisor uprighting of the canines bicuspids and molars. www.indiandentalacademy.com
  44. 44. On a normodivergent Class I skeletal pattern, coherence of 3rd order iformation on the incisors (torque on inclinations) with the second order informaiton in the buccal segments (inclinations) www.indiandentalacademy.com
  45. 45. On a normodivergent skeletal pattern with a Class II tendency, coherence of the 3rd order information on the incisors (torque on inclinations) with the 2nd order information in the buccal segments (angulations). www.indiandentalacademy.com
  46. 46. In this case, the high torque level on the incisors doesn’t come with a sufficient angulation of the buccal segments; this creates a high risk of root approximation. www.indiandentalacademy.com
  47. 47. Here, the high level of torque on the incisors comes with a sufficient canine angulation but an insufficient angulation of the bicuspids; this creates an occlusal disturbance and a risk of root approximation. www.indiandentalacademy.com
  48. 48. In a normodivergent Class III skeletal pattern, incisor angulations are less pronounced, torque in a buccal segments will be more pronounced thus rather positive. www.indiandentalacademy.com
  49. 49. In a normodivergent Class I skeletal pattern, coherence of 2nd order incisor information (angulations) with the 3rd information in the buccal segments (torque or inclinations) www.indiandentalacademy.com
  50. 50. In a normodivergent class II skeletal pattern, incisor angulations are more pronounced, toruqe in the buccal segments will be less pronounced thus rather negative. www.indiandentalacademy.com
  51. 51. Here, the canine has a positive torque, which is adopted to the transverse skeletal relationships: if the torque on the bicuspids is not coordinated, an occlusal dysharmony is creted. www.indiandentalacademy.com
  52. 52. Class III transversal Class I transversal Class II transversal www.indiandentalacademy.com
  53. 53. “A normal face is no longer one where cephalometric values are closest to the mean, but one whose cephalometric values show harmony in their relationships defined in variable association tables. In this concept, there is no such thing as a unique normal face defined by a mean value, there are a series of normal faces” - J. Dibbets. www.indiandentalacademy.com
  54. 54. www.indiandentalacademy.com For more details please visit www.indiandentalacademy.com

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