Analysis of effects on incisor intrusion amount in the design of clear aligners on root resorption
Objective This study aimed to investigate the relationship between the amount of intrusion in maxillary central incisors and root resorption in clear aligner therapy.Methods A total of 62 non-extraction patients with deep overbite undergoing treatment with clear orthodontic correction technology in the Department of Orthodontics at Hefei Stomatological Hospital were included in the study.Three CBCT follow-up examinations were conducted at three different stages:before orthodontic treatment(T0),after a 1mm reduction in height(T1),and after a 2mm reduction in height(T2).The measurements of maxillary central incisor root length,root volume and labial and palatal alveolar bone heights were taken at these three stages.Statistical analysis was performed using SPSS 26.0 software.Results There was a positive correlation between incisor intrusion magnitude and root resorption(P<0.05).As the intrusion amount increased,the labial inclination of the incisors also increased(P<0.05).There was no statistically significant difference in the height of the labial alveolar bone among the three stages(P>0.05).However,there was a statistically significant difference in the height of the palatal alveolar bone(P<0.05),with significant resorption observed during the T2 phase.Root resorption was positively correlated with treatment time(P<0.05).Conclusion There is a relationship between the root resorption of maxillary central incisors and intrusion magnitude in clear aligner therapy.
Root resorptionIncisor intrusion magnitudeMaxillary central incisorsClear alignersAlveolar bone
万方数据
维普
