口腔医学研究

口腔医学研究 ›› 2023, Vol. 39 ›› Issue (5): 445-449.DOI: 10.13701/j.cnki.kqyxyj.2023.05.013

• 口腔影像学研究 • 上一篇    下一篇

年轻上颌中切牙根尖区解剖结构的CBCT测量

王琳琳1, 田洪盛2, 徐莹3, 樊明儒1, 秦秀荣3*   

  1. 1.山东省济南市口腔医院医学影像科 山东 济南 250001;
    2.山东中医药大学第一附属医院医学影像科 山东 济南 250011;
    3.山东省济南市口腔医院儿童口腔科 山东 济南 250001
  • 收稿日期:2022-10-06 出版日期:2023-05-28 发布日期:2023-05-16
  • 通讯作者: *秦秀荣,E-mail:qinxiurong0531@163.com
  • 作者简介:王琳琳(1985~ ),女,山东泰安人,主治医师,硕士,研究方向:口腔颌面影像诊断。

Measurement of Apical Anatomy of Immature Maxillary Central Incisor using Cone-beam Computed Tomography

WANG Linlin1, TIAN Hongsheng2, XU Ying3, FAN Mingru1, QIN Xiurong3*   

  1. 1. Deparement of Medical Imaging, Jinan Stomatological Hospital, Jinan 250001, China;
    2. Department of Medical Imaging, Shandong University of Traditional Chinese Medicine, Jinan 250011, China;
    3. Department of Pediatric Dentistry, Jinan Stomatological Hospital, Jinan 250001, China
  • Received:2022-10-06 Online:2023-05-28 Published:2023-05-16

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摘要： 目的: 研究年轻上颌中切牙根尖区解剖结构的CBCT影像学表现。方法: 纳入100例Nolla 8期、100例Nolla 9期的正常年轻上颌中切牙CBCT影像资料,观察根尖区骨硬板的影像学特征,应用CBCT自带软件测量根尖孔近远中径及唇舌向径、根尖区阴影近远中径、唇舌向径及上下径,比较Nolla 8期与Nolla 9期根尖孔及根尖区阴影各径线的大小,分析根尖孔与正常根尖区阴影各径线间是否存在相关性。结果: 年轻上颌中切牙Nolla 8期根尖孔近远中径、唇舌向径分别为:(2.75±0.68) mm、(3.28±0.74) mm,正常根尖区阴影近远中径、唇舌向径及上下径分别为:(3.84±0.73) mm、(4.49±0.68) mm、(3.41±1.27) mm;年轻上颌中切牙Nolla 9期根尖孔近远中径、唇舌向径分别为:(1.50±0.51) mm、(1.92±0.79) mm,正常根尖区阴影近远中径、唇舌向径及上下径分别为:(2.76±0.60) mm、(3.41±0.80) mm、(2.06±0.65) mm;Nolla 9期根尖孔近远中径及唇舌向径、根尖区阴影近远中径、唇舌向径及上下径较Nolla 8期显著减小(t=14.75,P<0.01;t=12.65,P<0.01;t=11.42,P<0.01;t=10.27,P<0.01;t=9.36,P<0.01);正常根尖区阴影近远中径、唇舌向径及上下径与根尖孔近远中径及唇舌向径呈正相关(根尖孔近远中径:r=0.904,P<0.01;r=0.700,P<0.01;r=0.552,P<0.01。根尖孔唇舌向径:r=0.739,P<0.01;r=0.876,P<0.01;r=0.445,P<0.01)。Nolla 8期上颌中切牙根尖区更可能出现模糊的宽带骨硬板,随着根尖孔的发育,根尖区骨硬板倾向于清晰锐利。结论: Nolla 8期较Nolla 9期上颌中切牙具有更大的根尖孔及根尖区阴影,骨硬板趋于清晰锐利,对年轻上颌中切牙根尖区解剖结构认识的提高,有助于年轻上颌中切牙根尖区病变的诊断、治疗与预后。

关键词: 年轻上颌中切牙, 根尖区解剖结构, 锥形束CT

Abstract: Objective: To investigate the CBCT findings of apical anatomy of immature maxillary central incisors. Methods: CBCT images of 100 immature maxillary central incisors at Nolla stage 8 and 100 immature maxillary central incisors at Nolla stage 9 were collected. The mesiodistal and carniocaudal diameters of apical foramen of immature maxillary central incisors were measured by software included with CBCT, as well as the mesiodistal, carniocaudal, and facioligual diameters of apical shadow. The diameters of apical shadow and apical foramen were compared between Nolla stage 8 and Nolla stage 9. The correlation between the diameters of apical shadow and apical foramen was calculated. The data were analyzed with MedCalc software package. Results: The mesiodistal and facioligual diameters of apical foramen of immature maxillary central incisors at Nolla stage 8 were (2.75±0.68) mm and (3.28±0.74) mm, respectively. The mesiodistal, facioligual, and carniocaudal diameters of apical shadow of immature maxillary central incisors at Nolla stage 8 were (3.84±0.73) mm, (4.49±0.68) mm, and (3.41±1.27) mm, respectively. The mesiodistal and facioligual diameters of apical foramen of immature maxillary central incisors at Nolla stage 9 were (1.50±0.51) mm and (1.92±0.79) mm, respectively. The mesiodistal, facioligual and carniocaudal diameters of apical shadow of immature maxillary central incisors at Nolla stage 9 were (2.76±0.60) mm, (3.41±0.80) mm, and (2.06±0.65) mm, respectively. The immature maxillary central incisors at Nolla 8 stage showed significantly larger apical shadow and apical foramen than those at Nolla 9 stage (P＜0.05). The mesiodistal, facioligual, and carniocaudal diameters of apical shadow were positively correlated with the mesiodistal and facioligual diameters of apical foramen (P＜0.001). The apical region of maxillary central incisors at Nolla 8 stage was more likely to have a broad and blurred lamina dura. With the development of apical foramen, lamina dura in the apical region tended to be clear and sharp. Conclusion: The immature maxillary central incisors at Nolla 8 stage have larger apical shadow and apical foramen than those at Nolla 9 stage. With the development of apical foramen, lamina dura in the apical region tends to be clear and sharp. Clinical diagnosis and treatment of periapical periodontitis could be improved with better understanding of apical anatomy.

Key words: immature maxillary central incisor, apical anatomy, cone-beam computed tomography