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- W2377246985 abstract "Objective To treat the patients of Angle class Ⅱ division I malocclusion with deep overbite and deep overjet at their late stage of mixed dentition or inchoate permanent denture stage during or before growth peak,by using the uniquely designed Sander Ⅱ functional appliance with portions of palatine guide,maxillary Ni-Ti screw expanding arch spring and mandibular expanding arch spring.Methods Patients of Angle class Ⅱ division I malocclusion with deep overbite and deep overjet were selected at their late stage of mixed dentition or inchoate permanent denture stage during or before growth peak,and their mandibular plane angle was average or low.Thirteen patients were collected to treat with the Sander Ⅱ functional appliance for a year.Lateral cephalometrics were taken before and after the treatment,and then data were analyzed with methods developed by orthodontic department of Xi 'an Jiaotong university stomatological hospital.Statistical analysis was carried out using paired sample t-test for differences among groups with SPSS18.0 software.Results Statistically significant difference was found in ANB °,ANS-Ptm,Co-Pg,U1-APg,L1-NBmm,L1-NB °,L6-MP,UL-E line and N '-Sn-Pg with P0.01.Wits value,NA-Pg,U1-SN°,U6-PP,and N'-Pg'-FH also had significant discrepancy with P0.05.Conclusion Relative position of the maxilla and mandible changed obviously for protraction of mandibular and growth of maxillary base bone,as well as significantly increased length of mandibular base bone.Angle of facial convexity decreased and upper anterior teeth retracted obviously.The lower facial height increased for elongation of first molars,but still relatively coordinated with all facial height.Protrusion of the upper and lower lips was reduced,and protraction of chin was observed.Reconstruction of the profile of soft tissue and bone tissue was consistent." @default.
- W2377246985 created "2016-06-24" @default.
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- W2377246985 date "2013-01-01" @default.
- W2377246985 modified "2023-09-23" @default.
- W2377246985 title "Sander IIfunctional appliance production and treatment of class II malocclusion clinical application study" @default.
- W2377246985 hasPublicationYear "2013" @default.
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