What approaches to Class III treatment are available for what purposes?
There are six possible approaches to Class III treatment:
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Control mandibular growth (direction) (with a chin cup).
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| 2. |
Move ﾔAﾕ point forward by stimulation of maxillary growth (with rapid palatal expansion and maxillary protraction).
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| 3. |
Move ﾔBﾕ point back with clockwise rotation of the mandible (with Class III elastics and a chin cup).
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| 4. |
Establish Class I relationship by extraction (of premolars and molars).
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| 5. |
Establish Class I relationship with an occlusal plane change (with Class III elastics and second order bends).
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| 6. |
Orthognathic surgery.
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A specific example of each approach will be shown:
1. I used to attempt to control mandibular growth (direction) with a chin cup. An example of such an attempt is shown below: |
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Although chin-cup treatment was popular in Japan, some people viewed the treatment as illustrated in the figure below.
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2. Move A point forward by stimulation of maxillary growth (rapid maxillary expansion and protraction). |
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The skeletal Class III problem was successfully corrected by forward movement of A-point with a rapid maxillary expander and a facial mask.
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I currently use the following rapid maxillary expander and facial mask.
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