Study on the morphological changes of condyles and upper canine alveolar bone before and after treatment in adults with angle classⅡ division malocclusion DivisionⅠ
Objective To explore and study the changes in condylar and upper canine alveolar bone morphologies before and after treatment in adult patients with angle class II division malocclusion Division 1.Methods Sixty-two adult patients with Class II,Division I malocclusion who received treatment at Jiaozuo People's Hospital from August 2021 to December 2023 were selected as the study subjects.All patients received arch expansion orthodontic treatment,with a treatment observation period of 6 months.The changes in condyle morphology and alveolar bone morphology of the upper canine were recorded.Results After 6 months of treatment,the morphological parameters of the condyle,including ANB,SNA,SNB,Sn-H,and LL-E,in 62 patients decreased significantly compared to before treatment(P<0.05),while LL-H increased significantly compared to before treatment(P<0.05).After 6 months of treatment,the displacement distance of molars significantly decreased,and the inclination angle difference of the central incisors and the protrusion distance of the upper central incisors significantly increased compared to before treatment,with statistical significance(P<0.05).During the 6-month treatment period,8 cases of complications occurred,with an incidence rate of 12.90%,including 5 cases of dental caries,1 case of oral mucosal injury,1 case of food impaction,and 1 case of periodontitis.After 6 months of treatment,the oral function scores such as fixation,aesthetics,comfort,and chewing function were significantly higher than before treatment,and the difference was statistically significant(P<0.05).Conclusions Before and after treatment for adult angle class II division malocclusion Division 1,there will be significant morphological changes in the condyle and maxillary alveolar bone,which can significantly improve the oral function of patients.
adultsangle class II division malocclusion division 1condyleupper canine alveolar bone
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