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
3. During recent time, the Begg and
Edgewise philosophies are coming
closer to each other.
www.indiandentalacademy.com
4. Light orthodontic forces
Mechanics of ( controlled ) tipping
followed by root movement
(Segmented edgewise)
Begg influence on edgewise
practice:
www.indiandentalacademy.com
5. Edgewise influence on the Begg
practice
Root control from the beginning
(“ controlled tipping ” in the first
two stages which simplifies the
third stage mechanics)
www.indiandentalacademy.com
6. Why clearcut division ( Crown tipping
followed by root movement ) in classic
Begg?
Because lingual root torque on
incisors antagonizes incisor
intrusion.
Lingual Root torque and distal
root uprighting tax anchorage.
www.indiandentalacademy.com
8. MAA attempts root control from
stage-I without significantly
affecting intrusion and anchorage.
„ A major advance in Begg appliance‟
www.indiandentalacademy.com
9. How ?
Base wire –0.018” Premium Plus ( for
intrusion, arch form control and
molar control)
MAA –0.009” Supreme ( Ultra fine
wire for ultra light root moving
forces). www.indiandentalacademy.com
11. In this presentation, MAA as was
originally conceived by Dr.
Mollenhauer will be covered and
then the slightly modified way in
which we use it will be described.
www.indiandentalacademy.com
14. 0.009” Supreme wire become available
in 1984.
Initially used as aligning wire (AOJ‟87)
then
as aligning rectangles- MAA (AOJ‟90)
www.indiandentalacademy.com
15. Requirements
1) Ultra light root moving forces.
Hence
a.) 0.009” wire
b.) reciprocal torque not more than
450 .
www.indiandentalacademy.com
16. 2.) Yet, wire must be resilient to
resist deformation.
Hence supreme grade,preferably
pulse straightened.
www.indiandentalacademy.com
17. 3.) Strong base wire to resist the
vertical and transverse reactive forces.
Hence 0.018” Premium plus.
www.indiandentalacademy.com
18. Requirements ( contd.)
Thickest possible lock pins or hook
pins (e.g. Ceramaflex pin) for
transmitting lingual root torque to
teeth ( since auxiliaries are kept
incisally for better hygiene).
www.indiandentalacademy.com
19. ORIGINAL MAA FOR LINGUAL
ROOT TORQUE
www.indiandentalacademy.com
23. Advantages of MAA according to
Mollenhauer:
1. Efficacy of intrusion and retraction.
2. Reciprocability of torque ( on
instanding 2s or palatally placed 3s.).
Hence periodontal benefits ( gingival
dehiscence prevented).
www.indiandentalacademy.com
24. 3.) Early root control with short stage III.
4.) Possibility of cortical bone growth
( at point A and point B).
www.indiandentalacademy.com
25. Application of MAA:
1. Body alignment of crowded teeth by
combination of
a) Expansion + Crown alignment
(looped arch wire like effect)
&
b) Root torque.
www.indiandentalacademy.com
28. Application of MAA ( contd..)
2.) After stage I as braking mechanics
( by bending more positive torque)
3.) For labial root torque on
a) Lower incisor in class II
b) Upper incisor in class III
(For cortical bone development)www.indiandentalacademy.com
29. 4.) MAA- tip for controlling Mesio-
distal angulation of root apices in
stage I
( superior to light uprighting springs
for anchorage ?).
Application of MAA ( contd..)
www.indiandentalacademy.com
32. Biomechanics of MAA
Class II or class I elastic force causes
uncontrolled tipping of U incisors
during stage I.
Sufficient counter moment must be
provided to obtain controlled tipping.
One way to provide such counter
moment is from the intrusive force of
the archwire. www.indiandentalacademy.com
33. Very light forces generated by MAA can
also provide torquing moments on the
teeth to counter the moment generated
by the class II or class I elastics, resulting
in controlled tipping
Biomechanics of MAA ( Contd..)
www.indiandentalacademy.com
34. Lingual torquing couple of MAA is
additive to the moment generated by
intrusive force on incisors.
Both together, produce the required
M/F ratio.
Biomechanics of MAA ( Contd..)
www.indiandentalacademy.com
36. For lower incisor intrusion during
stage I, MAA for labial root torque is
need to prevent proclination of lower
incisors.
www.indiandentalacademy.com
39. Moment resulting from intrusive
force diminishes in stage II.
Therefore MAA is must to provide
moment for controlled tipping.
www.indiandentalacademy.com
42. For retracting lower incisors in
stage II , MAA with lingual root
torque is needed for controlled
tipping ( like upper)
Thus lower incisors may need different
MAA for stage I & II.
www.indiandentalacademy.com
43. Can MAA in 0.009” wire be used
for torquing the roots in stage III ?
www.indiandentalacademy.com
44. NO.
Because for controlled root movements,
higher M/F ratios ( 12/1) is required .
But similar ( Boxed) design in
0.011”wire can be use.
www.indiandentalacademy.com
46. How our MAA application differs ?
a) Lingual torque delivered indirectly
through pin caused difficulties. (Of
course we did not try Ceramaflex
pins). Pin tails can rotate. Pins can
move up and down.
www.indiandentalacademy.com
49. Hence MAA was modified to press
directly on incisal area for labial root
torque and gingival area for lingual
root torque.
www.indiandentalacademy.com
50. Original MAA was always engaged
first in the brackets and base arch
wire was piggy back.
In our modification, when lingual
root torque is needed on all the teeth
or reciprocal root torque on some
teeth, base wire is engaged first and
the MAA is piggy back.
www.indiandentalacademy.com
51. Original MAA for lingual root torque
Modification MAA for lingual root torquewww.indiandentalacademy.com
53. When labial root torque is needed
on all teeth, we use the original
design and also place it first in the
bracket similar to original
application
www.indiandentalacademy.com
57. Since our experience with pins was
not favorable, we do not use MAA
tips.
www.indiandentalacademy.com
58. MAA for expansion like multiloop
wire ?
May cause unpredictable action or
round tripping.
Hence we use MAA only for torque
control after crowns are aligned.
www.indiandentalacademy.com
70. Wire bent parallel to the boxes but
in opposite direction.
www.indiandentalacademy.com
71. Then give another bend close to
the first bend but at right angle.
Complete the box. Make another
cross over.
Complete the blank.
www.indiandentalacademy.com
91. The disadvantage of such an
application is that it cannot be used for
reciprocal torque on adjacent teeth.
Use Begg brackets with built in
torque (Kameda‟s design )?
www.indiandentalacademy.com
92. In conclusion, it could be said that the
MAA and its modification have
proved a major advance in refining
the Begg mechanics.
The rectangular wire substitutes for
the MAA ( and the torquing
auxiliary) have made it possible to
apply them even in a busy practice.
www.indiandentalacademy.com