Page 109 - 南京医科大学自然科学版第1期

第41卷第1期 南京医科大学学报（自然科学版）
2021年1月 Journal of Nanjing Medical University（Natural Sciences） ·103 ·

·临床研究·

成年骨性Ⅱ类错 患者上颌中切牙牙根与切牙管的位置关系

研究

倪洁丽，秦金炜 ，张 阳 *
*
南京医科大学口腔疾病研究江苏省重点实验室，南京医科大学附属口腔医院正畸科，江苏 南京 210029

［摘 要］ 目的：研究成年骨性Ⅱ类错 畸形患者上颌中切牙牙根与切牙管的位置关系，进一步探讨上中切牙唇倾度对其位
置关系的影响。方法：选取67例安氏Ⅱ类且骨性Ⅱ类错牙牙合合的成年患者，通过锥形束CT和Dolphin11.9软件在切牙管腭侧开口
平面（F1）和根尖平面（F2）上分别测量切牙管到上颌中切牙之间的相关数据，根据∠U1⁃PP角度分为上颌中切牙唇倾组、直立
组、舌倾组，采用单因素方差分析和秩和检验对测量结果进行统计分析。结果：腭侧开口平面和根尖平面上，上中切牙近中缘
至切牙管的距离（Lml）分别为（3.27±1.02）mm、（3.07±1.35）mm。腭侧开口平面上，3组切牙管侧缘到同侧上中切牙的距离（Lc）
差异有统计学意义，唇倾组明显小于直立组和舌倾组；根尖平面上，3组Lml的差异有统计学意义，舌倾组明显大于唇倾组和直立
组。结论：成年骨性Ⅱ类错 患者上前牙内收是有限度的，唇倾组的上中切牙牙根更接近切牙管，舌倾组牙根更远离切牙管。
［关键词］ 切牙管；上颌中切牙；骨性Ⅱ类；牙齿移动
［中图分类号］ R783.5 ［文献标志码］ A ［文章编号］ 1007⁃4368（2021）01⁃103⁃06
doi：10.7655/NYDXBNS20210119

Study on the relationship between the roots of maxillary central incisors and the incisive
canal in skeletal Ⅱ adults

*
NI Jieli，QIN Jinwei ，ZHANG Yang *
Jiangsu Key Laboratory of Oral Diseases，Department of Orthodontics，the Affiliated Stomatologyical Hospital of
Nanjing Medical University，Nanjing 210029，China

［Abstract］ Objective： To study the distance between the upper central incisors and the incisive canal，and further discuss the effect
of inclination of upper central incisors on the distance. Methods：A total of 67 adult skeletal Ⅱ and angle Ⅱ orthodontic patients were
included in this study. CBCT and Dolphin11.9 software were used to measure the distance between the incisive canal and upper central
incisor roots at two planes：the palatal opening level（F1），and the root apex level of the maxillary central incisors（F2）. Then，all
patients were divided into three groups（procline，upright，and recline）according to ∠U1⁃PP. One⁃way ANOVA or rank sum test was
performed for statistical analysis. Results：At F1 and F2 planes，the anteroposterior distance between upper incisor roots and the
anterior line of incisive canal（Lml）was（3.27±1.02）mm and（3.07±1.35）mm，respectively. As for three groups，Lc of procline group
was significantly lower than upright group and recline group at F1 plane；while Lml of recline group was significantly larger than the
other two groups at F2 plane. Conclusion：There is strict limit in tooth movement during retraction of the maxillary incisors in adult
skeletal Ⅱ orthodontic patients. The upper incisor roots of procline group were much closer to the incisive canal，while the upper
incisor roots of recline group were much far away from the incisive canal.
［Key words］ incisive canal；maxillary incisors；skeletal Ⅱ adults；tooth movement
［J Nanjing Med Univ，2021，41（01）：103⁃108］

［基金项目］ 国家自然科学基金（81700942）；江苏省高校优势学科建设工程资助项目（2018⁃87）
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