姚 月,李 飒,李 任,白宇宏

根管充填材料的封闭性是影响根管治疗结果的关键因素。Micro-CT作为一种高分辨率三维成像技术，能够在无损条件下对根管内充填物及孔隙结构进行精确定量与三维可视化分析，已成为根管封闭性评价的重要工具。本文系统回顾了Micro-CT在根管充填封闭性评价中的研究进展，比较了其与传统微渗漏检测方法的优势与局限，重点综述了不同根管封闭剂及充填技术对封闭性能的影响。同时，本文讨论了Micro-CT技术面临的高阻射伪影干扰、扫描参数标准化缺失等挑战，展望了人工智能在图像自动化分割与三维模型构建中的应用前景。

微计算机断层扫描；根管封闭剂；界面孔隙；三维定量分析；孔隙率

[1] Chen Z,Yang Y,Fan W.Reducing apical voids for intra-canal sealer injection using a modified passive deflation needle[J/OL]. Odontology,2024,112(3):839-846. [2] Liu H,Lai W W M,Hieawy A,et al.Micro–computed Tomographic Evaluation of the Quality of Root Canal Fillings in Mandibular Molars after Obturation for 54 Months[J/OL].Journal of Endodontics,2021,47(11):1783-1789. [3] 张淑存,葛堂娜,熊世江.根尖封闭性评估方法研究进展[J/OL].中国实用口腔科杂志,2016,9(1):54-58. [4] Lothamer C W,Anderson A,Hetzel S J,et al.Apical Microleakage in Root Canals Obturated With 2 Different Endodontic Sealer Systems in Canine Teeth of Dogs[J/OL].Journal of Veterinary Dentistry,2017,34(2):86-91. [5] Alves A M H,Pozzobon M H,Bortoluzzi E A,et al.Bacterial penetration into filled root canals exposed to different pressures and to the oral environment-in vivo analysis[J/OL].Clinical Oral Investigations,2018,22(3):1157-1165. [6] Derkson G D,Pashley D H,Derkson M E.Microleakage measurement of selected restorative materials:A new in vitro method[J/OL].The Journal of Prosthetic Dentistry,1986,56(4):435-440. [7] Wu M‐K.,Gee A J D,Wesselink P R,et al.Fluid transport and bacterial penetration along root canal fillings[J/OL].International Endodontic Journal,1993,26(4):203-208. [8] 方玉叶,吕长海.微渗漏检测方法的研究进展[J/OL].医学综述,2019,25(11):2242-2247. [9] Lares C,ElDeeb M E.The sealing ability of the thermafil obturation technique[J/OL].Journal of Endodontics,1990,16(10):474-479. [10] Endal U,Shen Y,KnutÅ,et al.A High-resolution Computed Tomographic Study of Changes in Root Canal Isthmus Area by Instrumentation and Root Filling[J/OL].Journal of Endodontics,2011,37(2):223-227. [11] Huang Y,Celikten B,De Faria Vasconcelos K,et al.Micro-CT and nano-CT analysis of filling quality of three different endodontic sealers[J/OL].Dentomaxillofacial Radiology,2017,46(8):20170223. [12] 赵麒桐,王艳茹,张敏,等.3种根管封闭剂根尖封闭性能的Micro-CT研究[J/OL].口腔医学,2024,44(6):443-447. [13] Guivarc’h M,Jeanneau C,Giraud T,et al.An international survey on the use of calcium silicate-based sealers in non-surgical endodontic treatment[J/OL].Clinical Oral Investigations,2020,24(1):417-424. [14] Donnermeyer D,Bürklein S,Dammaschke T,et al.Endodontic sealers based on calcium silicates:a systematic review[J/OL].Odontology, 2019,107(4):421-436. [15] Heran J,Khalid S,Albaaj F,et al.The single cone obturation technique with a modified warm filler[J/OL].Journal of Dentistry,2019, 89:103181. [16] 张纪敏,乔玮玮,狄跃,等.新型根管充填材料i-MTA SP的根管封闭性能初探[J/OL].临床口腔医学杂志,2024,40(9):515-519. [17] KeleşA,Alcin H,Kamalak A,et al.Micro‐CT evaluation of root filling quality in oval‐shaped canals[J/OL].International Endodontic Journal,2014,47(12):1177-1184. [18] Radwanski M,Leski M,Puszkarz A K,et al.A Micro-CT Analysis of Initial and Long-Term Pores Volume and Porosity of Bioactive Endodontic Sealers[J/OL].Biomedicines,2022,10(10):2403. [19] Al-Rayesse R,Al-Jabban O,Eid A,et al.Influence of Bioceramic Cements on the Quality of Obturation of the Immature Tooth:An In Vitro Microscopic and Tomographic Study[J/OL].Bioengineering,2024,11(3):213. [20] Milanovic I,Milovanovic P,Antonijevic D,et al.Immediate and Long-Term Porosity of Calcium Silicate–Based Sealers[J/OL].Journal of Endodontics,2020,46(4):515-523. [21] Angerame D,De Biasi M,Pecci R,et al.Filling ability of three variants of the single-cone technique with bioceramic sealer:a micro-computed tomography study[J/OL].Journal of Materials Science:Materials in Medicine,2020,31(11). [22] Orhan K,Jacobs R,Celikten B,et al.Evaluation of Threshold Values for Root Canal Filling Voids in Micro-CT and Nano-CT Images[J/OL].Scanning,2018,2018:1-6. [23] Haberthür D,Hlushchuk R,Wolf T G.Automated segmentation and description of the internal morphology of human permanent teeth by means of micro-CT[J/OL].BMC Oral Health,2021,21(1):185.

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