不同垂直骨面型下颌第一磨牙横向位置差异的CBCT研究  

CBCT Study on Transverse Position of Mandibular First Molar with Different Vertical Facial Types

作　　者：李放[1] 张锡忠[2] LI Fang;ZHANG Xizhong(The Second Department of Orthodontics,Hefei Stomatological Hospital,Hefei Clinical College of Stomatology,Anhui Medical University,Hefei 230041,China;Department of Orthodontics,Tianjin Stomatological Hospital,Tianjin 300041,China)

机构地区：[1]合肥市口腔医院正畸二科、安徽医科大学合肥口腔临床学院,安徽合肥230041 [2]天津市口腔医院正畸科,天津300041

出　　处：《口腔医学研究》2024年第6期544-549,共6页Journal of Oral Science Research

基　　金：安徽省重点研究与开发计划项目(编号:2202e07020059)。

摘　　要：目的:使用锥形束CT(cone beam CT,CBCT)测量不同垂直骨面型下颌第一磨牙生理牙槽骨厚度,评估横向磨牙位置。方法:选取2023年1~10月在合肥市口腔医院正畸二科就诊患者50例,分为高角组、均角组及低角组,术前拍摄CBCT,数据导入配套三维软件进行4个部位不同深度牙槽骨厚度的测量分析。结果:高角患者下颌第一磨牙的骨厚度最小。下颌第一磨牙舌侧骨厚度高于颊侧。下颌第一磨牙釉牙骨质界根方4 mm处近中舌侧牙槽骨厚度高于远中舌侧,近中颊侧牙槽骨厚度与远中颊侧比较差异无统计学意义。下颌第一磨牙釉牙骨质界根方8 mm处远中颊侧牙槽骨厚度高于近中颊侧,近中舌侧的牙槽骨厚度与远中舌侧比较差异无统计学意义。下颌第一磨牙同一测量位点釉牙骨质界根方8 mm的牙槽骨厚度高于根方4 mm的牙槽骨厚度。结论:不同的垂直骨面型、测量部位、测量深度、牙齿解剖形态都会反映出下颌第一磨牙在牙槽骨中横向位置的差异。Objective:To measure the physiological alveolar bone thickness of the mandibular first molar with different facial types using cone beam CT(CBCT)and evaluate the transverse position of the mandibular first molar.Methods:Fifty patients who had taken CBCT before orthodontics at the Second Department of Orthodontics,Hefei Stomatological Hospital from January 2023 to October 2023 were selected.They were divided into high angle group,mean angle group,and low angle group.The data were imported into the supporting 3D software to measure and analyze the thickness of alveolar bone at different depths in four locations.Results:The bone thickness of the first mandibular molar in high angle patients was the smallest.The lingual bone thickness of the first mandibular molar was higher than that of the buccal side.The thickness of the mesial lingual alveolar bone at the 4mm root of the mandibular first molar enamel cementum junction(CEJ)was higher than that of the distal lingual side,and there was no significant difference in the thickness of the mesial buccal alveolar bone compared to the distal buccal side.The thickness of the alveolar bone on the distal buccal side of the first mandibular molar at 8mm of the CEJ was higher than that on the mesiobuccal side,and there was no significant difference in the thickness of the alveolar bone on the mesiolingual side compared to the distal lingual side.The thickness of the alveolar bone below the CEJ of the first mandibular molar at the same measurement site,which was 8mm in the root,was higher than that of the alveolar bone at 4mm in the root.Conclusion:Different vertical facial types,measurement sites,measurement depths,and tooth anatomical shapes all reflect the differences in the transverse position of the mandibular first molar in the alveolar bone.

关 键 词：下颌第一磨牙 牙槽骨厚度 垂直骨面型 锥形束CT 

分 类 号：R783.5[医药卫生—口腔医学]