The treatment of bimaxillary protrusion. A cephalometric consideration of changes in the inter-incisal angle and soft tissue profile.
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.
Keating
P J
PJ
D000293:Adolescent; D002508:Cephalometry; D002648:Child; D005145:Face / Q000033:anatomy & histology*; D005260:Female; D006801:Humans; D008046:Lip / Q000033:anatomy & histology; D008297:Male; D008310:Malocclusion / Q000473:pathology / Q000628:therapy*; D008311:Malocclusion, Angle Class I / Q000473:pathology / Q000628:therapy*; D011378:Prognathism / Q000473:pathology / Q000628:therapy