Introduction to Orthodontics Fifth Year

1. Anchorage
In Orthodontics
May 22, 2012
Dr. Ahmed Basyouni
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2. Outline
 Definition
 Factors affecting resistance of a tooth to a given
force
 Types of anchorage:
Extra-oral:
Intra-oral:
Intra-maxillary
Inter-maxillary
Examples:
Reinforcement of anchorage:
Temporary Orthodontic Micro Anchorage System:
May 22, 2012
Dr. Ahmed Basyouni
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3. Today’s Anchorage System
Past Anchorage System
May 22, 2012
Dr. Ahmed Basyouni
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4. May 22, 2012
Dr. Ahmed Basyouni
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5. May 22, 2012
Dr. Ahmed Basyouni
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6. Definition
Anchorage is the resistance used to
overcome the reaction of an applied force.
According to Newton’s third law of motion,
to every action there is an equal and opposite
reaction.
May 22, 2012
Dr. Ahmed Basyouni
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7. Resistance of a tooth to a given force
depend on the following:
Root area of a tooth, resistance is directly
proportional to root area.
2. Bone density in which the tooth is situated.
3. Force direction relative to direction of
natural growth.
1.
May 22, 2012
Dr. Ahmed Basyouni
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8. Resistance of a tooth to a given force depend on the following:
4. Type of movement, greater resistance is
offered to a force which causes bodily
movement of the teeth than one which
permits teeth to tilt.
5. Muscular pressure can offer active resistance
to orthodontic tooth movement, e.g. in
tongue thrusting habit.
6. The manner of interlocking of cusps.
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Dr. Ahmed Basyouni
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9. Types of anchorage
Anchorage
Extra-oral
May 22, 2012
Intra-oral
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10. Extra-Oral
Cervical
May 22, 2012
Occipital
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Parietal
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11. Extra-oral Parietal, Occipital and
Cervical anchorage:
Occipital anchorage eliminates possibility of
undesirable forward movement of mandibular
anchor teeth and used to distalize or prevent
forward displacement of maxillary dental arch,
especially when teeth in mandibular arch do not
require mesial movement.
May 22, 2012
Dr. Ahmed Basyouni
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12. Extra-oral Parietal, occipital and Cervical anchorage:
CERVICAL
HEADGEAR
May 22, 2012
HIGH-PULL HEADGEAR
Dr. Ahmed Basyouni
VERTICAL PULL CHIN-CUP
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13. Extra-oral anchorage:
PROTRACTION
FACE MASK
For Maxillary Protraction
May 22, 2012
Dr. Ahmed Basyouni
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14. Intra-Oral
Intra-maxillary
Inter-maxillary
Intra-maxillary Anchorage: is obtained from teeth in one jaw to move other teeth
in same jaw.
Inter-maxillary Anchorage: is obtained from teeth in one jaw to move other teeth
in opposite jaw.
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Dr. Ahmed Basyouni
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15. Intra-maxillary
Simple
Single
Compound
Stationary
Single
Reciprocal
Compound
Single
May 22, 2012
Simple
Compound
Dr. Ahmed Basyouni
Stationary
Single
Compound
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16. Simple anchorage: anchor tooth will
be tipped if it can not overcome the
resisting force.
Stationary anchorage: anchor tooth
would be moved bodily if it can not
overcome the resisting force.
Reciprocal: There is reciprocal force
exerted between teeth to be moved.
May 22, 2012
Dr. Ahmed Basyouni
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17. Single anchorage: a tooth of greater support
in the alveolar process is used to move a
tooth of lesser support.
Compound anchorage: number of teeth of
greater support in the alveolar process used
to move teeth of lesser support.
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Dr. Ahmed Basyouni
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18. Inter-maxillary
Simple
Single
May 22, 2012
Compound
Stationary
Compound
Reciprocal
Simple
Single
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Stationary
Compound Compound
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19. Examples:
1. Short labial arch appliance:
Anchorage type:
Intra-oral
Intra-maxillary
Simple
compound
May 22, 2012
Dr. Ahmed Basyouni
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20. 2. Canine retractor appliance:
Anchorage type:
Intra-oral
Intra-maxillary
Simple
compound
May 22, 2012
Dr. Ahmed Basyouni
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21. 3. Finger or Z spring appliance:
Anchorage type:
Intra-oral
Intra-maxillary
Simple
compound
May 22, 2012
Dr. Ahmed Basyouni
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22. 4. Upper arch expander appliance:
a) If palatal plate end at palatal side
Anchorage type:
Intra-oral
Intra-maxillary
Reciprocal
Simple
compound
May 22, 2012
Dr. Ahmed Basyouni
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23. Upper arch expander appliance:
b) If palatal plate end at buccal side (Full capping)
Anchorage type:
Intra-oral
Intra-maxillary
Reciprocal
Stationary
compound
May 22, 2012
Dr. Ahmed Basyouni
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24. 5. Lower/upper inclined plane appliance:
Anchorage type:
Intra-oral
Inter-maxillary
Stationary
compound
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Dr. Ahmed Basyouni
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25. 6. Anderson appliance:
Anchorage type:
Intra-oral
Inter-maxillary
Reciprocal
Stationary
compound
BIONATOR
(ANDREASON APPLIANCE/ACTIVATOR)
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Dr. Ahmed Basyouni
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26. Reinforcement of anchorage:
a) Mandible may be used to reinforce the
anchorage by engagement of lower incisors
& canines by a plane built on palatal aspect
of a removable appliance.
b) A rigid short labial bow wire, incisors
engaged palatally at cervical margin by
base plate and labially with labial bow so
they can move bodily forward with the
appliance.
May 22, 2012
Dr. Ahmed Basyouni
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27. Unit A has substantially more anchorage value than
Unit B. Thus, Unit A moves little but Unit B moves
a lot.
Unit A
May 22, 2012
Unit B
Dr. Ahmed Basyouni
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28. Temporary Orthodontic Micro
Anchorage System
Orthodontic mini screw,
self-tapping cutting edge
tip and tapered structured
profile will make your
precise implant possible.
Further, will minimize the
treatment period and
assure an outstanding
result.
May 22, 2012
Dr. Ahmed Basyouni
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29. Correction in the anteroposterior plane of space: molar protraction
Indications:
• Corrections in the anteroposterior dimension
• Corrections in the vertical dimension
• Preprosthetic orthodontics, single tooth movement,
and mutilated dentition
Correction in the vertical plane of space: molar intrusion
May 22, 2012
Dr. Ahmed Basyouni
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30. Buccal mini-implant immediately after placement.
Residual wound 24 hours after mini-implant removal
May 22, 2012
Dr. Ahmed Basyouni
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31. Temporary Orthodontic Micro Anchorage System
May 22, 2012
Dr. Ahmed Basyouni
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32. Summary
 Definition
 Factors affecting resistance of a tooth to a given force
 Types of anchorage:
Extra-oral:
Intra-oral:
Intra-maxillary
Inter-maxillary
Examples:
Reinforcement of anchorage:
Temporary Orthodontic Micro Anchorage System:
May 22, 2012
Dr. Ahmed Basyouni
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33. Lab. Session
May 22, 2012
Dr. Ahmed Basyouni
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34. Important Dates:
 Final Practical Exam. May 21, 2012
 Final Written & Oral May 19, 2012
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Dr. Ahmed Basyouni
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35. The Wise Way …
May 22, 2012
Dr. Ahmed Basyouni
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36. If you are successful, you will win
some false friends and some true
enemies;
Succeed anyway.
May 22, 2012
Dr. Ahmed Basyouni
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37. If you are kind, people
may accuse you of
selfish, ulterior motives;
May 22, 2012
Be kind anyway.
Dr. Ahmed Basyouni
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38. The good you do today,
people
will often forget tomorrow;
Do good anyway.
May 22, 2012
Dr. Ahmed Basyouni
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39. You see, in the final analysis,
it is all between you and God;
It was never between you and
them anyway.
May 22, 2012
Dr. Ahmed Basyouni
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40. May 22, 2012
Dr. Ahmed Basyouni
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