双生子颅面深度和上气道宽度的遗传和环境因素研究

ObjectiveThis study aimed to investigate the influences of genetic and environmental factors on craniofacial depth and upper airway width in a mixed dentition period and to provide a theoretical basis for functional correction plans.MethodsThe relative indexes of the craniofacial depth and the upper airway width in the lateral cephalic radiographs of 183 twin girls aged 6-12 years were measured. The influences of genetic and environmental factors on craniofacial depth and upper airway width were subjected to longitudinal statistical analysis by using the twin research method.ResultsThe influence of environmental factors on craniofacial depth was greater than that of genetic factors. The effect of environmental factors on mandibular depth (L4-L7) was stronger than that on maxillary depth (L1-L3). The influence of environmental factors on the upper airway width (d1-d6) was greater than that of genetic factors. The role of genetic factors in oropharyngeal and laryngopharynx airways was insignificant (PConclusionThe craniofacial depth and airway width of cephalometric measurements in twin girls are strongly affected by environmental and genetic factors.