MSE骨性扩弓后上颌牙根及颊侧齿槽骨吸收状况的CBCT分析  

Changes of Upper Root and Buccal Alveolar Bone Resorption after MSE:A Cone-beam CT analysis

作　　者：郑如松 李岩涛[2] 王兰珠 生安菊 ZHENG Rusong;LI Yantao;WANG Lanzhu;SHENG Anju(Department of Orthodontics, Rizhao Stomatology Hospital, Rizhao 276800, China;Department of Stomatology, Traditional Chinese Medicine Hospital of Rizhao, Rizhao 276800, China)

机构地区：[1]日照口腔医院正畸科,山东日照276800 [2]日照市中医医院口腔科,山东日照276800

出　　处：《口腔医学研究》2021年第6期543-548,共6页Journal of Oral Science Research

摘　　要：目的:分析MSE骨性扩弓治疗后上颌牙根及颊侧齿槽骨的吸收变化情况。方法:选取上颌横向发育不足(上牙弓狭窄)患者16例(年龄16~24岁;男7例,女9例)。应用MSE骨性扩弓器进行扩弓治疗,所有患者均在3个月内完成加力,扩弓结束后拍摄CBCT与扩弓前的CBCT比较,所有DICOM数据导入Mimics17.0软件进行牙齿三维重建,分析扩弓前后上中切牙,第一前磨牙,第二前磨牙,第一磨牙的牙根长度(体积)及颊侧齿槽骨高度和厚度的变化。结果:扩弓前后的CBCT对比显示:(1)所有测量牙齿的牙根长度及体积仅有轻微改变,但无统计学意义(P>0.05);(2)颊侧齿槽骨高度及厚度的测量发现支抗牙部位存在显著改变(P<0.05);非支抗牙部位的改变均无统计学意义(P>0.05)。结论:MSE骨性扩弓后未见显著牙根吸收;颊侧齿槽骨高度和厚度在支抗牙部位的吸收显著高于非支抗牙部位,为临床选择扩弓器提供一定参考依据。Objective:To determine the changes of upper root and buccal alveolar bone resorption after MSE expander by cone-beam CT(CBCT).Methods:This study included 16 patients(7 males and 9 females ranged from 16 to 24years)with narrow upper arch treated with MSE.CBCT images were taken before and after expansion.All Dicom data were imported Mimics17.0 software and reconstructed.The root length and alveolar bone height/thickness were compared and measured,respectively.Statistical analysis were performed using paired t-test.Results:The CBCT measurements were as follows:(1)There was only slight change in all measured root length,but no statistical significance(P>0.05);(2)The buccal alveolar bone height and thickness showed significant changes in anchorage teeth,but there was no significant change in non-anchorage teeth(P>0.05).Conclusion:No significant root resorption was found after MSE treatment.The alveolar height and thickness resorption was more severe in the anchorage teeth than in the non-anchorage teeth,which provided reference for clinical selection of dental expander types.

关 键 词：快速扩弓 牙根吸收 CBCT 

分 类 号：R78[医药卫生—口腔医学]