J. Orthod.
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British Journal of Orthodontics, Vol 13, 209-220, Copyright © 1986 by British Orthodontic Society

ARTICLES

The treatment of bimaxillary protrusion. A cephalometric consideration of changes in the inter-incisal angle and soft tissue profile

PJ Keating

Thirty bimaxillary protrusion cases, who had four first premolars extracted were compared with thirty Class I malocclusion cases who, likewise, had similar extractions and treatment. The changes, both in incisor relationships and the concurrent soft tissue profiles are documented. During treatment, the inter-incisal angle was increased by 20 degrees and relapsed by 4 degrees post-treatment. The protuberance of the soft tissue profile was significantly reduced by 4 degrees concurrently (Holdaway Angle). It is concluded that worthwhile treatment objectives can be achieved in these cases.




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Copyright © 1986 British Orthodontic Society.