Stability Analysis of Cortical Osteotomy Assisted Orthodontic Treatment for Skeletal Class Ⅲ Malocclusion
Objective To investigate the stability of skeletal Class Ⅲ malocclusion after cortical osteotomy assisted orthodontic treatment.Methods 98 patients with skeletal Class Ⅲ malocclusion in Zhangjiakou Stomatological Hospital from January 2017 to January 2018 were selected and randomly divided into control group(n=48)and observation group(n=50).The control group was treated with conventional orthodontic treatment,and the observation group was treated with cortical osteotomy.And the changes of the width of keratinized gingiva,tooth position,hard tissue and soft tissue before and after treatment in the two groups were compared.Results The alignment time,clearance time and total time of the observation group were significantly shorter than those of the control group(P＜0.05).The sagittal movement distance of maxillary central incisor and maxillary first molar in the observation group were significantly shorter than those in the control group(P＜0.05).The width of keratinized gingiva increased gradually in the two groups,the widest one week after treatment,and then decreased gradually,and returned to the preoperative level 8 weeks after treatment.There was significant difference between the two groups at different time points(P＜0.05),but there was no significant difference between the two groups(P＞0.05).After treatment,the tooth position indexes(U1I-CP,U1R-CP)of the observation group were significantly higher than those of the control group(P＜0.05).1 year after treatment,the hard tissue indexes(SNA,UARA,Sd-CP)of the observation group were significantly higher than those of the control group(P＜0.05).1 year after treatment,the soft tissue indexes(Ls-HP,Ls-CP,NLA)of the observation group were significantly higher than those of the control group(P＜0.05).Conclusion The stability of patients with skeletal ClassⅢ malocclusion is significantly improved,the curative effect is enhanced,the recovery is fast,and the safety is high,which is worthy of clinical promotion.
skeletal Class Ⅲ malocclusioncortical osteotomyorthodontictooth positionstability
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