Application of Ricketts Cephalometric in the Establishment of the Clinical Normal Values in Adolescent Population

Abstract

OBJECT: this study was to investigate the establishment of the normal values of the Ricketts cephalometric analysis method indicators in the Han nationality adolescents in Zhenjiang, and to compare the gender differences of craniofacial characteristics. METHODS: A randomized survey of individual normal occlusions was performed among Han nationality adolescents aged 10-14 in primary and secondary schools in Zhenjiang City. 120 normal permanent occlusal adolescents who met the inclusion criteria were selected. Men and women, average age (12± 2.0 years old). The face is beautiful and harmonious, the shape and the bite balance, the relationship between the bones and the teeth is normal, the permanent teeth are all present, and there is no history of orthodontic treatment or facial trauma. Using the Ricketts analysis method in Dolphinl 10.0 software, 35 indicators were measured, including 19 line spacing indicators and 16 angles. The t-test was used to compare the standards of male and female Han ethnic groups in Zhenjiang. RESULTS: Several statistically significant gender differences were significant. There were no significant differences in gender differences between the other indicators except the degree of protrusion, maxillary depth, length of mandibular body, and length of anterior skull base (P<0.05). Conclusion: The Ricketts analysis method of Han Chinese adolescents in Zhenjiang showed that there were no statistically significant differences in dental index, tooth-to-bone relationship, and aesthetic factors. A point of protrusion in the bone index; face-to-skull relationship maximal depth angle of the factor index; the length of the mandibular body and the length of the anterior skull base in the internal structural factors of the skull. The measured values are male>female, and the gender difference is statistically significant. Therefore, it should be considered in the diagnosis, design and analysis of clinical orthodontics. Gender differences.