中国美容医学2025，Vol.34Issue(3)：56-60,5.
成人轻中度牙弓狭窄患者上颌慢速牙槽扩展效果的CBCT研究
Study on the Clinical Efficacy after Slow Maxillary Alveolar Expansion in Adults by Cone-beam Computerized Tomography
摘要
Abstract
Objective To explore the effect of slow alveolar expansion on the teeth and alveolar bone in adults with mild to moderate arch deficiency.Methods Choose 20 Cases who with mild to moderate arch deficiency from the Department of Stomatology,the First Affiliated Hospital,Medical School of Xi'an Jiaotong University,from January 2016 to December 2017,and expanded at a frequency of 1/4 turn every 5 days.Measure the arch width,tooth inclination,l alveolar bone width,alveolar bone inclination,alveolar bone height and thickness before and after slow alveolar expansion.The results are statistically analyzed.Results The slow alveolar expansion increase the width of the first molar by(4.60±1.77)mm,the distance between the roots increased by(2.83±2.83)mm,and the left and right teeth are buccally inclined by(4.19±2.26)°and(4.38±2.77)°.The crown width of the first premolar increases by(4.75±1.35)mm,the distance between the roots increases by(2.68±1.91)mm,and the left and right teeth are buccally inclined by(5.50±3.51)and(5.49±1.74),the measurement results showed that the changes in the width of the posterior tooth crown and root were statistically significant(P＜0.05),the ratio of root to the crown in the first premolar,the second premolar,and the first molar movement distance respectively were:55.37%,42.40%,61.84%.The slow alveolar expansion increase the inclination angle of the alveolar bone of the first premolar to the first molar by(9.33±3.83)°(7.23±2.46)°and(6.87±2.97)°,the measurement results showed that the changes in inclination of the posterior alveolar bone before and after treatment were statistically significant(P＜0.05).The width of the middle of the first premolar and the width of the enamel bone boundary increased by(1.54±1.55)mm and(1.94±1.53)mm,the measurement results showed that the changes in palatal width before and after were statistically significant(P＜0.05).The average thickness of the alveolar bone in the posterior region decrease by 0.32-0.54 mm.The average width of the palatal side increase 0.43-0.96 mm,and the height of the buccal alveolar reduces by 0.28-0.44 mm on average,the measurement results showed that the changes in the thickness and height of the posterior alveolar bone were statistically significant(P＜0.05),no obvious absorption was observed of roots.Conclusion Slow alveolar expansion can effectively expand the dental arch of adult patients with mild to moderate arch deficiency without significant alveolar bone resorption.The side effects are small and it is safe to expand the alveolar within the of indications.关键词
牙弓狭窄/成人/慢速牙槽扩展/锥体束CT(CBCT)Key words
maxillary transverse deficiency/adult/slow alveolar expansion/cone-beam computed tomography分类
医药卫生引用本文复制引用
张婧,周思颖,冯玉霞,陈曦..成人轻中度牙弓狭窄患者上颌慢速牙槽扩展效果的CBCT研究[J].中国美容医学,2025,34(3):56-60,5.基金项目
陕西省高校联合项目(编号:2020GXLH-Y-014) （编号:2020GXLH-Y-014）
甘肃省自然科学基金(编号:24JRRA004) （编号:24JRRA004）
