[Study on mandibular rotation in 13 female subjects aged from 9.5 to 15.5].
OBJECTIVE
To evaluate the mandibular rotation in females aged from 9.5 to 15.5 years.


METHODS
The sample was obtained from Mathews's implant study with longitudinal cephalometric records of 13 untreated Caucasian female subjects. The cephalograms taken annually from 9.5 to 15.5 years old were traced and analyzed with Dentofacial Software. Paired-t test was performed to identify the significant growth changes in different age groups.


RESULTS
Significant change in lower anterior facial height, posterior facial height, ramus length and mandibular implant plane angle were noted in aged 9.5-11.5. Significant change in lower anterior facial height, posterior facial height and ramus length were noted in aged 11.5-13.5. Significant change in mandibular plane angle and mandibular implant plane angle and significant increase in posterior facial height were observed in aged 13.5-15.5.


CONCLUSIONS
The results of this study verify that remodeling on the lower border of mandible influences total mandibular rotation.
Gu
Yan
Y
Dept. of Orthodontics, School and Hospital of Stomatology, Peking University, Beijing 100081, China.
D000293:Adolescent; D002508:Cephalometry; D002648:Child; D005260:Female; D006801:Humans; D008334:Mandible; D012399:Rotation