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Cephalometric evaluation of soft tissue changes after extraction of upper first premolars in class II div 1 patients

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Cephalometric evaluation of soft tissue changes after extraction of upper first premolars in class II div 1 patients

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dc.contributor.author Amirabadi, Gholamreza-Eslami es
dc.contributor.author Mirzaie, Marzieh es
dc.contributor.author Kushki, Somayyeh-Mehrabi es
dc.contributor.author Olyaee, Pooya es
dc.date.accessioned 2015-01-20T09:13:34Z
dc.date.available 2015-01-20T09:13:34Z
dc.date.issued 2014 es
dc.identifier.citation Amirabadi, Gholamreza-Eslami ; Mirzaie, Marzieh ; Kushki, Somayyeh-Mehrabi ; Olyaee, Pooya. Cephalometric evaluation of soft tissue changes after extraction of upper first premolars in class II div 1 patients. En: Journal of Clinical and Experimental Dentistry, 2014, Vol. 6, No. 5: 539-545 es
dc.identifier.uri http://hdl.handle.net/10550/41310
dc.description.abstract Introduction: Tooth extraction to provide sufficient space, or camouflage of underlying skeletal problems is quite common in orthodontics. The present study evaluated soft tissue changes after upper first premolars extraction in class II div 1 patients. Material and Methods: 20 cases (15 females, 5 males), with a mean age of 17.8±2.9 years with class II div1 malocclusion and normal vertical height, who needed upper first premolars extraction were selected. Pre- and post- treatment lateral cephalometric radiographs were digitized. Image analysis was conducted by View Box 3.1.1 software. Paired t-test was used for comparison of pre- and post-treatment results. Results: The relationship of upper and lower lip to E-line and B-line had significant reduction. Dental variables of U1-NA(mm), U1-NA(°), overjet and overbite showed statistically significant reduction. Interincisal angle had significant increase. There were no significant difference in lower incisor variables and skeletal variables like SN- GoGn and FMA. Conclusions: Extraction of upper first premolars in patients with class II div 1 malocclusion resulted in normal position of lips as presented by Holdaway, Legan and Ricketts which play a role in aesthetic profile. However, the amount of lip retraction was different from patient to patient. en_US
dc.subject Odontología es
dc.subject Ciencias de la salud es
dc.title Cephalometric evaluation of soft tissue changes after extraction of upper first premolars in class II div 1 patients es
dc.type journal article es_ES
dc.subject.unesco UNESCO::CIENCIAS MÉDICAS es
dc.type.hasVersion VoR es_ES

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