A Longitudinal Study On The Dental Arch And Palatal Arch Development Of The Children In ZhengHe, FuJian

Objective: The study is to obtain the data about the dental arch and palatal arch of the children in Zhenghe, Fujian. To know the development regularity and characteristic of the growth at 5 to 12 years .we have spend 4 years tracing the dental and palatal arches'growth and development. The study on the growth of the dental arch and palatal arch will accumulate data for the children in Fujian.Methods: We choosed 140 children in Zhenghe County at the age between 4.0 and 8.5, traced them for 4 years, made their dental models every 2 years, and measured them by electronic vernier caliper. We measured the arch width,arch length,arch perimeter and palatal height .We analyzed the data using SPSS 13.0.Result:1. Arch width1.1 Arch width in maxillaryThe width between maxillary deciduous canines increases significantly from 6 to 12. The width between maxillary deciduous second molars increases significantly at the age between 5 and 10. The width between maxillary permanent first molars increases significantly from 10 to 12.1.2 Arch width in mandibularThe width between mandibular deciduous canines and between mandibular deciduous second molars increase significantly at the age 5 to 8 and 10 to 12. The width between mandibular permanent first molars increases significantly at the age between 8 and 10.2. Arch length2.1 Arch length in maxillaryThe length between maxillary deciduous canines increases significantly from 6 to 12. The length between maxillary deciduous second molars increases significantly at the age between 6 and 10. The length between maxillary permanent first molars increases significantly at the age between 7 and 10.2.2 Arch length in mandibularThe length between mandibular deciduous canines increases significantly form 6 to10.The length between mandibular deciduous second molars increases significantly from 6 to 8.3. Arch perimeter3.1 Arch perimeter in maxillaryThe perimeter between maxillary deciduous second molars increases significantly between 5 and 10. The perimeter between maxillary permanent first molars increases significantly between 8 and 10.3.2 Arch perimeter in mandibularThe perimeter in mandibular has no significant change between 5 and 12.4. Palatal heightThe Palatal height between maxillary deciduous second molars increases significantly at the age of 7 to 9. The Palatal height between maxillary permanent first molars increases significantly at the age of 8 to 12.Conclusion:Through tracing the growth of the children's dental arch and palatal arch for 4 years,we discovered that at the age of 5 to 12, the children's arch have their own change regulation. And it is helpful to the cure in clinic.