Study on Pars Orbitalis Symmetry of UCLP Patients in Mixed Dentition Period

摘要

[Objectives] To analyze pars orbitalis symmetry of UCLP patients in mixed dentition period,and provide better theoretical basis for studying craniofacial shape and clinical treatment. [Methods]3 D reconstruction of CBCT images of 20 UCLP patients in mixed dentition period was conducted,and 13 mark points were selected from 3 D image for fixed-point measurement to analyze 3 D shape of pars orbitalis. [Results]( i) Horizontal symmetry of pars orbitalis. The width of pars orbitalis of UCLP patients at sites So,Lo,Oi,Or,So F,Z of fracture side was all equal to that at nonfracture side,and there was not statistical difference( P > 0. 05).( ii) Sagittal symmetry of pars orbitalis. Sagittal development of pars orbitalis of UCLP patients at sites So,Lo,Oi,Or,So F,Z of fracture side was equal to that at nonfracture side,and there was not statistical difference( P > 0. 05).( iii) Vertical symmetry of pars orbitalis. The height of pars orbitalis of UCLP patients at sites So,Lo,Oi,So F,Z of fracture side was higher than that at nonfracture side,and there was not obvious statistical difference( P > 0. 05).[Conclusions] There was not significant asymmetry in pars orbitalis of UCLP patients in mixed dentition period.