下颌第二磨牙阻生的骨性与牙性指标的三维研究

›› 2019, Vol. 10 ›› Issue (4): 201-213.

下颌第二磨牙阻生的骨性与牙性指标的三维研究

何柳¹,王天丛¹,陈金东¹,李贵凤¹,陆伟²,季骏¹

1. 南京大学医学院附属口腔医院南京市口腔医院正畸科
2. 南京大学医学院附属口腔医院南京市口腔医院修复科

收稿日期:2019-08-26 修回日期:2019-11-10 出版日期:2019-12-25 发布日期:2020-01-06
通讯作者: 季骏 E-mail:drjijun@126.com
基金资助:
江苏省青年医学人才;南京市医学科技发展专项基金;优秀青年人才基金项目;第十六批“六大人才高峰”高层次人才项目

Three-dimensional bony and dental measurements of mandibular second molar impaction

Received:2019-08-26 Revised:2019-11-10 Online:2019-12-25 Published:2020-01-06

摘要/Abstract

摘要： 目的：通过CBCT测量下颌第二磨牙阻生的骨性和牙性指标，探究下颌第二磨牙阻生的机制，为临床治疗提供指导。方法：选取53例下颌第二磨牙阻生与53例下颌第二磨牙正常萌出患者的CBCT为研究对象，使用Mimics 19.0测量一般颌骨指标如SNA、SNB、ANB、Co-Gn、Co-Go、Go-Gn、W、Co-Go-Gn等，磨牙后间隙、牙冠宽度和牙弓后段拥挤度，对两组数据进行独立样本t检验和回归分析阻生相关因素。结果：阻生组与正常组在一般颌骨测量指标没有显著差异。阻生组的磨牙后间隙小于正常组，下颌第二磨牙冠宽大于正常组，有第三磨牙存在的牙弓后段拥挤度显著大于正常组中有第三磨牙存在的拥挤度。磨牙后间隙与阻生负相关，下颌第二磨牙冠宽和牙弓后段拥挤度与阻生正相关。结论：下颌第二磨牙的阻生与磨牙后间隙小、下颌第二磨牙冠宽、牙弓后段拥挤有关。

关键词: 第二磨牙阻生, CBCT , 可用间隙, 牙弓后段拥挤

Abstract: Objective: To evaluate the bony and dental characteristics of mandibular second molar impaction and to provide reference for clinical treatment. Methods: Pretreatment CBCT records of 53 subjects of impacted mandibular second molar were selected as impaction group, and the same number of fully erupted mandibular second molar as eruption group. Mimics 19.0 software was used to observe and measure the indexes like SNA, SNB, ANB, Co-Gn, Co-Go, Go-Gn, W, Co-Go-Gn, retromolar space, tooth size and posterior tooth crowd. Independent t test and binary linear regression were analyzed and significant difference was identified with P＜0.05. Results: The impaction and eruption group didn’t differ significantly in respect to the bony measurements. Retromolar space was significantly shorter, and second molar was wider in the impaction group. Posterior tooth crowd of third molar in impaction group was statistically bigger than in the eruption group. Conclusions: Mandibular second molar impaction seemed to be relevant to retromolar space, mesiodistal width of the second molar, and the posterior tooth crowd.

Key words: second molar impaction, cone beam CT, retromolar space, posterior tooth crowd

何柳王天丛陈金东李贵凤陆伟季骏. 下颌第二磨牙阻生的骨性与牙性指标的三维研究[J]. , 2019, 10(4): 201-213.

参考文献 23

[1]	Bondemark L, Tsiopa J.Prevalence of Ectopic Eruption,Impaction,Retention and Agenesis of the Permanent Second Molar[J].Angle Orthodontist., 2007, 77(5):773-778
[2]	周洁, 唐国华，等.下颌第二磨牙阻生的病因及治疗方法[J].口腔材料器械杂志, 2009, 18(4):199-202
[3]	Rebecca Lash R, Tiziano B, Mcnamara JA.Mandibular second molar eruption difficulties related to the maintenance of arch perimeter in the mixed dentition[J].Am J Orthod Dentofacial Orthop, 2012, 141(2):146-152
[4]	Ferro F, Funiciello G, Perillo L, et al.Mandibular lip bumper treatment and second molar eruption disturbances[J].Am J Orthod Dentofacial Orthop, 2011, 139(5):622-627
[5]	逯之瑶.基于锥体束CT数据的西安地区恒牙列正常合三维颅颌面形态分析[J].第四军医大学, 2016, :-
[6]	Veli I, UT, Ozer T.Mandibular asymmetry in unilateral and bilateral posterior crossbite patients using cone-beam computed tomography[J].The Angle Orthodontist., 2011, 81(6):966-974
[7]	李章一.下颌第三磨牙阻生与骨面型形态特征的相关性研究[J].实用口腔医学杂志, 2014, 30(1):106-109
[8]	范雅儒, 赵浩然, 刘海霞, 等.下颌第三磨牙发育阶段与磨牙后间隙的关系研究[J].口腔医学研究, 2016, 32(1):71-74
[9]	Marchiori D F, Packota G V, Boughner J C.Three-Dimensional Assessment of Crown Size and Eruption Space for Developing Third Molars: Data Collection Techniques Based on Cone-Beam Computed Tomography (CBCT)[J].Methods in molecular biology,, 2019, 1992:341-356
[10]	Merrifield LL, Klontz HA, Vaden JL.Differential diagnostic analysis system[J].Am J Orthod Dentofacial Orthop., 1994, 106(6):641-648
[11]	Grover PS, Lorton L.The incidence of unerupted permanent teeth and related clinical cases[J].Oral Surgery Oral Medicine & Oral Pathology., 1985, 59(4):420-425
[12]	Vedtofte.Arrested eruption of the permanent lower second molar[J].European Journal of Orthodontics., 1999, 21(1):31-40
[13]	Shapira Y, Borell G, Nahlieli O, et al.Uprighting mesially impacted mandibular permanent second molars[J].Angle Orthodontist., 1998, 68(2):173-178
[14]	Stratemann S, Huang J, Maki K, et al.Comparison of cone beam computed tomography imaging with physical measures[J].Dentomaxillofac Radiol, 2008, 37(2):80-93
[15]	漆昱君.陕西地区出土6000年来人下颌骨后段形态演化的研究.[J].第四军医大学, 2014, :-
[16]	Cassetta M, Altieri F, Calasso S.Etiological factors in second mandibular molar impaction[J].Journal of Clinical and Experimental Dentistry, 2014, 6(2):e150-154
[17]	杨欢, 刘林, 吕亚林, 等.下颌第二磨牙阻生的预防及其早期矫治的初步研究[J].口腔颌面修复学杂志, 2019, 20(1):17-21
[18]	王震东.中国南京正畸患者中下颌第二磨牙阻生患者的临床特点[J].2017年国际正畸大会暨第十六次全国口腔正畸学术会议论文汇编, 2017, :182-183
[19]	Oettlé AC, Pretorius E, Steyn M.Geometric morphometric analysis of mandibular ramus flexure[J].American Journal of Physical Anthropology, 2005, 128(3):623-629
[20]	赵计林, 陈扬熙, 等.下牙弓后段可用间隙发育特征及其临床意义[J].实用口腔医学杂志, 2003, 19(1):51-3
[21]	邓凯雄, 刘进, 郭鑫.正畸治疗中磨牙的拔除和保留四十二——下颌第三磨牙获得性间隙对其生长发育的意义[J].临床口腔医学杂志, 2009, 25(5):317-319
[22]	Varpio M, Wellfelt B.Disturbed eruption of the lower second molar: clinical appearance, prevalence, and etiology. [J].ASDC J Dent Child., 1988, 55(2):114-118
[23]	Kavadia S, Antoniades K, Kaklamanos E, Antoniades V, Markovitsi E, Zafiriadis L.Early extraction of the mandibular third molar in case of eruption disturbances of the second molar. [J].J Dent Child (Chic), 2003, 70(1):29-32