逐步式双牙合垫矫治器治疗青少年下颌后缩畸形上气道形态变化的临床研究

Abstract

Abstract: Abstract: Objective To investigate changes of the upper airway dimensions before and after using stepwise Twinblock appliances （TB appliance）in young adult patients with mandibular retrognathia malocclusion.Methods 13 Angle class II division I patients with mandibular retrusion in mixed dentition or early permanent dentition were treated with stepwise Twinblock appliances.Cephalometric analysis was made before and after treatment.Results After the treatment,PNSR,SPPSPPW,UMPW,PAS,VLPW,HMP,HC3Me,HCVP,TGI,TGH,SPL,SPT increased significantly （P<0.05）,while PNSAd2 increased with no statistical significance （P＞0.05）.Conclusions Stepwise TB appliances can enlarge the patients upper airway and thus effectively improve the airway ventilation in the treatment of mandibular deficiency.

CLC Number:

R783.5

References

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Clinical study on the changes of upper airway dimensions by using stepwise Twinblock appliances in young adult patients with mandibular retrognathia malocclusion

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