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- W2368363032 abstract "Objective To explore the rules of changes of soft and hard tissues in adults with Angle Class Ⅱ1 malocclusion following extraction so as to provide reference for clinical diagnosis and treatment. Methods The first premolar was extracted in a sample of 20 Class Ⅱ1 adult cases. Cephalograms were measured, and the results were analyzed by SPSS16.0 software. Results The study showed that upper and lower lip protrusions were decreased by an average of 2.83mm and 3.17mm (P 0.05), respectively. Maxillary and mandibular incisor tips were retracted by an average of 7.10mm (P 0.01) and 3.60mm (P 0.05), respectively. Upper lip thickness was increased by an average of 2.9mm (P 0.01). The distance of upper labrale and lower labrale to Ricketts esthetic plane was decreased 1.30 mm and 3.22mm (P 0.01), respectively. ANB and Yaxis angles were increased by an average of 0.75°(P 0.05) and 1.53°(P 0.01); 1-SN, IMPA,1-1 and 1-MP angles were decreased by an average of 18.61°,6.00°,24.76°,and 6.38°(P 0.01),but nasolabial and labiomental angles were increased 5.2°and 8.35°(P 0.01),respectively. There was significant positive correlation between changes in the maxillary and mandibular incisor and the changes in the upper lip position and lower lip position. Conclusion A strong correlation exists between anterior tooth retraction and the position of both lips." @default.
- W2368363032 created "2016-06-24" @default.
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- W2368363032 date "2011-01-01" @default.
- W2368363032 modified "2023-09-22" @default.
- W2368363032 title "Soft and hard tissue changes after orthodontic treatment for adult patients with Angle Class II division I malocclusion" @default.
- W2368363032 hasPublicationYear "2011" @default.
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