TY - JOUR
T1 - Morphological changes of skeletal class iii malocclusion in mixed dentition with protraction combined activities
AU - Xu, Fan Yu
AU - Kwon, Tae Geon
AU - Rong, Hu
AU - Kyung, Hee Moon
AU - Bing, Li
AU - Wu, Xiu Ping
N1 - Publisher Copyright:
© 2018, Universidad de la Frontera. All rights reserved.
PY - 2018/6
Y1 - 2018/6
N2 - The objective of the study was to investigate the morphological changes of skeletal class III malocclusion in mixed dentition with light force protraction combined activities. Randomly selected 30 cases of orthodontics in Shanxi Medical University orthodontics patients (ages: 6-10 years) of the lateral cephalograms. Using the oral maxillary casting type of pre-traction device, according to the condition of maxillary dentition to select the corresponding activities of the movable expansion appliance, each side of the force of about 150-200 g, requiring patients to wear 10-12 hours a day, the appliance should be removed after reaching normal occlusion. The correlation cephalometric profile of the cranial lateral radiographs before and after orthodontic treatment was measured. All patients with skeletal class III malocclusion were improved, concave type became direct type, measurements SNA, ANB, A-Ptm, MP-SN, ANS-Me/N-Me increased, maxillary advancement and reconstruction are more obvious; mandible rotates clockwise; the increase of lip inclination of anterior teeth compensatory changes, lower anterior tooth inclination changes smaller; upper lip forward, nasolabial angle decreased, improved appearance significantly. Light force protraction combined activities can make the mixed dentition of skeletal class III malocclusion in patients with significant improvement in profile appearance.
AB - The objective of the study was to investigate the morphological changes of skeletal class III malocclusion in mixed dentition with light force protraction combined activities. Randomly selected 30 cases of orthodontics in Shanxi Medical University orthodontics patients (ages: 6-10 years) of the lateral cephalograms. Using the oral maxillary casting type of pre-traction device, according to the condition of maxillary dentition to select the corresponding activities of the movable expansion appliance, each side of the force of about 150-200 g, requiring patients to wear 10-12 hours a day, the appliance should be removed after reaching normal occlusion. The correlation cephalometric profile of the cranial lateral radiographs before and after orthodontic treatment was measured. All patients with skeletal class III malocclusion were improved, concave type became direct type, measurements SNA, ANB, A-Ptm, MP-SN, ANS-Me/N-Me increased, maxillary advancement and reconstruction are more obvious; mandible rotates clockwise; the increase of lip inclination of anterior teeth compensatory changes, lower anterior tooth inclination changes smaller; upper lip forward, nasolabial angle decreased, improved appearance significantly. Light force protraction combined activities can make the mixed dentition of skeletal class III malocclusion in patients with significant improvement in profile appearance.
KW - Cephalometric measurements
KW - Mixed dentition
KW - Morphological characteristics
KW - Protraction
KW - Skeletal class III malocclusion
UR - http://www.scopus.com/inward/record.url?scp=85049771488&partnerID=8YFLogxK
U2 - 10.4067/S0717-95022018000200430
DO - 10.4067/S0717-95022018000200430
M3 - Article
AN - SCOPUS:85049771488
SN - 0717-9367
VL - 36
SP - 430
EP - 434
JO - International Journal of Morphology
JF - International Journal of Morphology
IS - 2
ER -