Research of cervical vertebrae posture differences of malocclusion patients with different facial types

Objective To study the characteristics and differences of patients' cervical vertebrae posture with different facial types to predict the sagittal growth of the patients. Methods 30 cephalometric radiograph of the patients with class I,class II,class III malocclusion which in their growth peak period and 30 in their later peak period from the orthodontic department of the stomatology hospital were included to measure and analyze the variance of the head position: SN- VEL,SN- OPT,SN- CVT,OPT- CVT,CVT- HOR,and the variance of the cranial- facial structures: SNA,SNB,ANB,SN- GoGn. The differences of the cervical vertebrae postures of patients with different sagittal skeletal patterns malocclusiond were compared in the same development period. Results Before the growth spurts: the indexes of SN- VEL,SN- CP,OPT- CVT in the class I,class II,class III among the groups were not statistically significant(P 0.05);the index of SN-OPT,SN-CVT,CVT-HOR in the class I,class II,class III among the groups were statistically significant(P 0. 05). After the growth spurts: the indicators of SN- VEL,SN- CP,SN- OPT,SN- CVT,OPT- CVT,CVT- HOR in the class I,class II,class III among the groups were statistically significant(P 0. 05). Conclusion There are differences before and after growth spurts with different sagittal skeletal pattern in cervical vertebrae posture.