Compensation of upper first molar in skeletal class Ⅲ patients treated with orthodontic-surgical treatment / 中华口腔医学杂志
Chinese Journal of Stomatology
; (12): 307-311, 2018.
Article
em Zh
| WPRIM
| ID: wpr-806493
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WPRO
ABSTRACT
Objectives@#To investigate the compensation of upper first molar in adult skeletal class Ⅲ patients.@*Methods@#The sample consisted of 48 skeletal class Ⅲ patients with orthodontic-surgical treatment from February 2011 to January 2015 in Peking University School and Hospital of Stomatology. They were allocated into 2 groups based on extraction, 28 patients in extraction group and 22 patients in non-extraction group. Dental casts were taken before and after treatment, and all the casts were scanned with a computer-assisted three-dimensional (3D) scanning system. Acquired 3D data were analyzed by Rapidform 2006. The tip and torque of the upper first molar were measured and analyzed.@*Results@#The tip and torque of the upper first molar in the skeletal class Ⅲ patients after treatment had no difference between extraction group and non-extraction group (P=0.150, P=0.144). The torque of upper first molar in extraction group [-3.32° (-5.10°, 1.16°)] before treatment was bigger than that in non-extraction group [-6.94° (-13.06°, -0.42°)] (P=0.005), and the inclination of upper first molar in extraction group was more obvious.@*Conclusions@#In skeletal class Ⅲ patients, the upper first molar inclined buccally to compensate the discrepancy and extraction was usually necessary for decompensation.
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WPRIM
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Zh
Revista:
Chinese Journal of Stomatology
Ano de publicação:
2018
Tipo de documento:
Article