Objective To investigate the effect of different orthodontic devices on the roots and alveolar bone of adult orthodontic extraction patients.Methods 64 adult orthodontic extraction patients with symmetrical extraction of the first premolar admitted to the Third People's Hospital of Puyang City from January 2018 to January 2023 were selected for the study,and they were divided into the invisible group and the fixed group according to the method of randomized numerical table,with 32 cases in each group.In the invisible group,bracketless invisible aligners were used,and in the fixed group,conventional fixed aligners were used.Cone beam CT(CBCT)was used to measure the root resorption and alveolar bone height in different positions before and after the treatment in the two groups.Results Root resorption at upper left central incisors,upper left lateral incisors,upper right central incisors,upper right lateral incisors,lower left central incisors,lower left lateral incisors,lower right central incisors,and lower right lateral incisors was significantly lower in the invisible group than that in the fixed group(P＜0.05);the difference in the alveolar bone heights of labial,lingual,proximal-medial,and distal-medial teeth was not statistically significant between the 2 groups after orthodontic treatment(P＞0.05).Conclusions Compared with conventional fixed aligners,bracketless invisible aligners for adult orthodontic extraction patients can help improve root resorption,and their impacts on the alveolar bone may be similar to conventional fixed aligners.
bracketless invisible alignerconventional fixed alignercone beam CTorthodonticstooth rootalveolar bone
万方数据
维普
