Application effect of expansion screw combined with Twin-block appliance in juvenile mandibular contraction and its influence on airway morphology
[Objective]To study the application effect of expansion screw combined withTwin-block appliance in teenagers and its effect on airway morphology.[Methods]Sixty-three adolescent patients with posterior jaw contraction admitted to SATH Hospital of Stomatology,Henan University from May 2021 to May 2022 were divided into two groups according to the random number method,the control group(32 cases)and the observation group(31 cases).The control group received Twin-block appliance early.The observation group received expansion screw combined with Twin-block appliance early,and the changes of tooth angle,airway morphology and hyoid bone position were observed.[Results]Before the correction,there was no significant difference between the two groups in upper and lower socket angle(ANB),skull base-lower socket angle(SNB),front and lower middle incisor mandibular plane(T-MP),skull base-upper socket angle(SNA)(P＞0.05);three months after the correction,ANB,SNB,T-MP,and SNA in the observation group were all larger than those in the control group(P＜0.05).Before the medical correction,there was no significant difference between the two groups in posterior nasal ridge-pharyngeal vertex distance(PNS-R),posterior soft palate-posterior pharyngeal wall distance of soft palate(SPP-SPPW),posterior nasal ridge-superior pharyngeal wall distance(PNS-UPW),and epiglottis-hypharyngeal wall distance(V-LPW)(P＞0.05);three months after the correction,PNS-R,SPP-SPPW,PNS-UPW,and V-LPW of the observation group were all larger than those of the control group(P＜0.05).Before the medical correction,no significant difference between the two groups in hyoid-orbital ear plane distance(H-FH),hyoid-mandibular plane distance(H-MP),hyoid-cervical anterior plane space(H-VL),hyoid-skull base plane distance(H-S)(P＞0.05);three months after the correction,H-FH,H-MP,H-VL,and H-S of the observation group were larger than those of the control group(P＜0.05).[Conclusion]The early correction of expansion screw combined with Twin-block appliance can effectively improve the tooth angle and airway morphology,correct the position of the hyoid bone and improve the ventilation function.
early correctionjaw cotractionairway morphologyspiral arch derTwin-block appliance
万方数据
维普
