Analysis of root development of maxillary inverted impacted central incisor before and after orthodontic traction by CBCT

doi:10.19439/j.sjos.2024.05.015

Abstract

Abstract: PURPOSE: To investigate the changes of root development before and after orthodontic traction of maxillary inverted impacted central incisors using CBCT and Mimics software. METHODS: Ten patients, who had a maxillary inverted impacted central incisor, were treated using a modified movable retractor combined with surgical eruption. Cone-beam computed tomography(CBCT) was taken before and after treatment. Mimics 21.0 software was used to reconstruct the impacted central incisors (the impacted teeth group) and the contralateral namesake teeth (the contralateral group) before and after treatment, and the tooth volume and surface area were calculated by the software. SPSS 26.0 software package was used for paired t test, to evaluate the root development before and after treatment. RESULTS: All 10 patients were successfully treated,and the mean duration was (16.10±4.46) months. After treatment, the volume and surface area of teeth in the impacted teeth group were significantly increased compared with those before treatment(P<0.01). The volume and surface area of the teeth before and after traction were significantly lower than those of the contralateral group(P<0.01). However, during the treatment, there were no significant differences in the increase of tooth volume and surface area between the two groups(P>0.05). CONCLUSIONS: Modified movable retractor combined with surgical eruption can promote root development of maxillary inverted impacted tooth, which is a safe and reliable treatment method.

Key words: Inverted impacted central incisor, Orthodontic traction, Surgery assistant eruption, Cone-beam CT

CLC Number:

R738.5

YAN Chuan-jie, ZHANG Wei, CHEN Zhi-fang, WU Jian-hua. Analysis of root development of maxillary inverted impacted central incisor before and after orthodontic traction by CBCT[J]. Shanghai Journal of Stomatology, 2024, 33(5): 529-532.

References

[1] Mockute G, Klimaite G, Smailiene D.The morphology of impacted maxillary central incisors: a systematic review[J]. Medicina (Kaunas), 2022, 58(4): 462-472.
[2] 胡莲. 手术导萌联合口腔正畸治疗对上颌埋伏阻生牙患者疼痛及美观度的影响[J]. 临床医学研究与实践,2020,5(27): 113-114.
[3] Jiang Q, Yang R, Mei L, et al.A novel approach of torque control for maxillary displaced incisors[J]. Am J Orthod Dentofacial Orthop, 2019, 155(6): 860-870.
[4] Yordanova G, Gurgurova G.Impacted upper central incisors - frequency and factors complicating the treatment protocol[J]. Folia Med (Plovdiv), 2021,63(3): 405-412.
[5] 蔡语馨, 杨鑫, 吴建勇. 上颌切牙埋伏阻生的病因和正畸治疗的现状[J]. 上海交通大学学报(医学版), 2020, 40(4): 543-547.
[6] Shi X, Tan X, Wang N, et al.Surgical resection after orthodontic eruption: a case report of compound odontoma-induced impacted maxillary right central incisor[J]. Heliyon, 2022, 8(8): e10197.
[7] Knop LA, Shintcovsk RL, Gandini LG Jr, et al.Impaction of maxillary central incisors: surgical and orthodontic treatment-case report[J]. Int J Orthod Milwaukee, 2015, 26(3): 25-29.
[8] Andrade I Jr, Paschoal MA, Santos TO.Spontaneous eruption of severely impacted teeth: the report of two cases[J]. J Clin Exp Dent, 2019,11(5): e491-e495.
[9] Hu H, Hu R, Jiang H, et al.Survival of labial inversely impacted maxillary central incisors: a retrospective cone-beam computed tomography 2-year follow-up[J]. Am J Orthod Dentofacial Orthop, 2017, 151(5): 860-868.
[10] 王玉华, 王林, 张卫兵, 等. 上颌中切牙水平埋伏矫治疗效的CBCT研究[J]. 实用口腔医学杂志, 2021, 37(5): 635-640.
[11] 陈国锋, 王笑辰, 王亮, 等. 垂直位埋伏阻生上颌中切牙正畸牵引治疗牙根发育的研究[J]. 口腔医学, 2020, 40(4): 330-333.
[12] Garlapati K,Ignatius A, Ajaykartik K, et al.Pathologies of impacted teeth: a cone-beam computed tomography diagnosis[J]. Indian J Dent Sci, 2019, 11(2): 116-120.
[13] 王笑辰,王林,谷妍,等. 上颌中切牙垂直埋伏阻生矫治疗效的锥形束CT分析[J]. 中华口腔医学杂志,2019, 54(11): 739-744.
[14] Han G, Huang S, Von den Hoff JW, et al. Root resorption after orthodontic intrusion and extrusion: an intraindividual study[J]. Angle Orthod, 2005, 75(6): 912-918.
[15] Li W, Chen F, Zhang F, et al.Volumetric measurement of root resorption following molar mini-screw implant intrusion using cone beam computed tomography[J]. PLoS One, 2013, 8(4): e60962.
[16] Baysal A, Karadede I, Hekimoglu S, et al.Evaluation of root resorption following rapid maxillary expansion using cone-beam computed tomography[J]. Angle Orthod, 2012, 82(3): 488-494.
[17] 陈威, 张薇, 陈志方. 儿童上颌埋伏中切牙弯根情况的Logistics回归分析[J]. 临床口腔医学杂志, 2020, 36(7): 421-424.
[18] Kuvvetli SS, Seymen F, Gencay K.Management of an unerupted dilacerated maxillary central incisor: a case report[J]. Dent Traumatol, 2007, 23(4): 257-261.
[19] Elhaddaoui R, Benyahia H, Azeroual MF, et al.Resorption of maxillary incisors after orthodontic treatment-clinical study of risk factors[J]. Int Orthod, 2016, 14(1): 48-64.
[20] Sun H, Hu R, Ren M, et al.The treatment timing of labial inversely impacted maxillary central incisors: a prospective study[J]. Angle Orthod, 2016, 86(5): 768-774.
[21] 王扬, 乔旖旎, 徐舒豪, 等. 上颌埋伏阻生的弯曲中切牙正畸牵引CBCT影像分析[J]. 临床口腔医学杂志, 2018, 34(6): 348-351.
[22] 孙超凡, 孙浩, 郑志伟, 等. 替牙期上颌埋伏中切牙正畸疗效的锥形束CT观察[J]. 中华口腔医学杂志, 2012, 47(9): 528-533.