Passive Self-locking Fixed Orthodontic Treatment with"2×4"and Maxillary Occlusal Pad Tongue Spring Activity Orthodontic Treatment for Anterior Teeth in Children with Mixed Dentition Comparison of Anti Occlusion
Objective To compare the changes in occlusal and functional anterior crossbite between the"2 × 4"passive self-locking fixed orthodontic technique and the maxillary occlusal pad tongue spring active orthodontic technique in the treatment of children with mixed dentition,and evaluate the therapeutic effects of the two methods.Methods Thirty children with anterior crossbite during the mixed dentition period were enrolled.For the observation group,a"2 × 4"passive self-locking fixed orthodontic technique was used.The control group was treated with maxillary occlusal pad tongue spring movement orthodontic technique.The X-ray cephalometric measurement of relevant hard tissues was as observation indicators for the two groups,and SPSS 26.0 statistical software was used to analyze the numerical changes before and after treatment.Results Compared with before treatment,the observation group showed an increase in SNA angle,ANB angle,U1-NA angle,U1-SN angle,FH-MP angle,and Y-axis angle after treatment(P all＜0.05),while SNB angle,NP-FH angle,and U1-L1 angle decreased(P all＜0.05).There were no statistically significant difference in the changes of L1-MP angle and L1-NB angle(P all＞0.05).The control group showed an increase in SNA angle,ANB angle,U1-NA angle,and U1-SN angle(P all＜0.05),while U1-L1 angle,L1-NB angle,and L1-MP angle decreased(P all＜0.05)after treatment.There were no statistically significant difference in the changesofSNB angle,NP-FH angle,FH-MPangle,and Y-axis angle(P all＞0.05).The comparison of changes between the two groups showed statistically significant differencesin SNB angle,ANB angle,NP-FH angle,and U1-L1 angle(P＜0.05),but there was no statistically significant difference in FH-MP angle,SNA angle,U1-SN angle,U1-NA angle,L1-MP angle,L1-NB angle and Y-axis angle(P all＞0.05).Conclusion Both treatment methods have varying degrees of correction for anterior malocclusion in children with mixed teeth.The"2 × 4"passive self-locking fixation orthodontic technique has better therapeutic effects,as it can suppress the tendency of mandibular protrusion and adjust the position of the upper and lower jaws.For children with crowded and uneven dentition,treatment can be given for misaligned dentition,midline deviation,and misalignment of molars.
"2×4"passive self-locking fixed orthodontic technologydynamic correction technique for maxillary occlusal padanterior crossbite in children during dental replacement period
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