The new improved interocclusal lip arch appliance correction of the clinical application of primary anterior teeth crossbite

Objective:To study the effection on curing primary anterior teeth crossbite on the development of permanent dental germ and jaw bone by using new improved interocclusal lip arch appliances.Method:Twenty children with primary anterior teeth were selected for treatment by using new improved interocclusal lip arch appliance.Lateral cephalograms were taken and analyzed during pretreatment and posttreatment of the patients.Result: SNA、UI/NA、UI-NA、SNG、G-SN、G-SV、ANB、NA/PA and Wits were significantly increased,SNB、LI/MP、LI/NB were significantly decreased(P 0.05),others were not significantly changed(P 0.05).Conclusion:The curing primary anterior teeth crossbite not only make the maxilla and primary maxillary incisor teeth forward movement,but also the permanent upper incisor germ moving labially.The new improved interocclusal lip arch appliance has both the mechanical and myofunctional effects and befits in those overbite cases.It has the clinical significance on the prevention of the crossbite in the permanent teeth appearance again.