骨性II类成年患者上中切牙根尖区牙槽骨量的CBCT研究

摘要/Abstract

摘要： ［摘要］　目的　采用CBCT评估骨性II类成年患者正畸术前上中切牙根尖区唇、腭侧牙槽骨量，分析影响上中切牙唇、腭侧牙槽骨量的相关因素。方法　根尖点所在水平参考平面为根尖平面（LA平面），平行且位于根尖平面上3mm的为根尖上平面（LU平面），平行且位于根尖平面下3mm的为根尖下平面（LL平面）。LA平面内，根尖到唇、腭侧骨壁的长度分别为L1、L2，L1与L2之和为LT1。LU平面内，牙体长轴延长线与LU平面的交点到唇、腭侧骨壁的长度分别为L3、L4，L3与L4之和为LT2。LL平面内，LL平面与牙体唇侧交点到唇侧骨壁的长度为L5，LL平面与牙体腭侧交点到腭侧骨壁的长度为L6，LL平面与牙槽骨唇、腭侧骨壁交点连线的长度为LT3。牙体长轴与腭平面的夹角为θ1，唇、腭侧牙槽嵴顶点连线中点的垂线与水腭平面的夹角为θ2。结果　θ1与L1、L3、L5呈显著正相关，θ2与L1、L3呈显著负相关，与L2、LT1、L4、LT2、L6、LT3呈显著正相关，SN-MP与L1、LT1、L3、LT2呈显著负相关，SNA与L2、L4、L6、LT3呈显著正相关。结论　本研究结果表明骨性II类上中切牙唇、腭侧牙槽骨厚度与上中切牙唇倾度、牙槽嵴倾斜度以及垂直骨面型有着密切的关系，其中上中切牙的唇倾度及垂直骨面型对上中切牙根尖区牙槽骨厚度的影响最大。

关键词: 骨性II类, 上中切牙, 牙槽骨, CBCT

Abstract: Abstract：　Objective　Using CBCT to evaluate the amount of labial and palatal alveolar in the root apex area of the maxillary central incisor in the skeletal class II adults before orthodontic treatment, and analyzing the related factors about the labial and palatal alveolar of the maxillary central incisors. Methods　The apical horizontal reference plane was the LA plane. The plane 3mm above the LA plane was the LU plane and the plane 3mm below the LA plane was the LL plane. In the LA plane, the distances from the apex to the labial and palatal alveolar are L1 and L2 respectively and LT1 was L1 and L2. In the LU plane, the distances from the intersection of the long axial of the incisor and the LU plane to the labial and palatal alveolar are L3 and L4 respectively and LT2 was L3 and L4. In the LL plane, the distance from the intersection point of the LL plane and the labial side to the labial alveolar was L5, the distance from the intersection point of the LL plane and the palatal side to the palatal alveolar was L6, and the distance from the intersection point of the LL plane to the labial and palatal alveolar was LT3.θ1 was the Angle between the palatal plane and the axis of the incisor, andθ2 was the angle between the palatal plane and the perpendicular line of the midpoint of the lip and palate alveolar crest. Results　θ1 was positively correlated with L1、L3 and L5.θ2 was positively correlated with L2、LT1、L4、LT2、L6、LT3 and negatively correlated with L1、L3、L5. SN-MP is negatively correlated with L1、LT1、L3 and LT2. SNA is positively correlated with L2、L4、L6 and LT3. Conclusions　The results showed that the thickness of maxillary central incisors labial and palatal alveolar in skeletal class II adults was closely correlated with the inclination of maxillary central incisors，the inclination of alveolar crest and the vertical dimension, among which the inclination of maxillary central incisors and the vertical dimension had the greatest influence on the thickness of maxillary central incisors labial alveolar bone.

Key words: skeletal class II, maxillary central incisor, alveolar bone, CBCT

中图分类号:

R783.5

徐海洋张卫兵. 骨性II类成年患者上中切牙根尖区牙槽骨量的CBCT研究[J]. , 2019, 39(6): 510-513.

XU Hai-Yang. A CBCT study of the alveolar bone in the maxillary central incisor root apex of the skeletal class II adults[J]. , 2019, 39(6): 510-513.

参考文献 18

[1]	陈香, 陈婷婷, 程敏.成人正畸治疗相关因素的回顾性分析[J].现代口腔医学杂志, 2014, 28(6):351-354
[2]	Cedro MK, Moles DR, Hodges SJ.Adult orthodontics--who's doing what?[J].Br J Orthod, 2010, 37(2):107-117
[3]	陈扬熙.口腔正畸学——基础、技术与临床[J].人民卫生出版社, 2012, :658-661
[4]	Xu Y, Xie J.Comparison of the effects of mini-implant and traditional anchorage on patients with maxillary dentoalveolar protrusion [J].Angle Orthod, 2017, 87(2):320-327
[5]	高美琴, 顾永佳, 吴燕平.微螺钉型种植体支抗与传统强支抗在上颌前突正畸治疗中的对比研究[J].口腔医学, 2007, 27(9):466-468
[6]	Bravo LA, Canut JA, Pascual A.Comparison of the changes in facial profile after orthodontic treatment,with and without extractions[J].Br J Orthod, 1997, 24(1):25-34
[7]	Ackerman JL, Proffit WR.Soft tissue limitations in orthodontics: treatment planning guidelines[J].Angle Orthod, 1997, 67(5):327-336
[8]	Ahmet Y, Ilknur V, Tancan U, et al.Dehiscence and fenestration in skeletal Class I,II,and III malocclusions assessed with cone-beam computed tomography[J].Angle Orthod, 2012, 82(1):67-74
[9]	Jin-Hyung K, Jae-Gi L, Dong-Hoo H.Morphometric analysis of the anterior region of the maxillary bone for immediate implant placement using micro-CT[J].Clinical Anatomy, 2011, 24(4):462-468
[10]	Nahás-Scocate ACR, Aluana DSBO, Mayara Paim P.Bone tissue amount related to upper incisors inclination[J].Angle Orthod, 2014, 84(2):279-285
[11]	Kaley J, Phillips C.Factors related to root resorption in edgewise practice[J].Angle Orthod, 1991, 61(2):125-132
[12]	夏文倩, 顾永佳, 高美琴.安氏Ⅱ类分类和分类错牙合畸形患者上中切牙区牙槽骨的三维形态分析[J].上海口腔医学, 2016, 25(1):68-71
[13]	Udom T, Chairat C, Sarayut J.Changes of anterior maxillary alveolar bone thickness following incisor proclination and extrusion[J].Angle Orthod, 2015, 85(4):549-554
[14]	Gracco A, Lombardo L, Mancuso G.Upper Incisor Position and Bony Support in Untreated Patients as Seen on CBCT[J].Angle Orthod, 2009, 79(4):692-702
[15]	Hyo-Won A, Sung Chul M, Seung-Hak B.Morphometric evaluation of changes in the alveolar bone and roots of the maxillary anterior teeth before and after en masse retraction using cone-beam computed tomography[J].Angle Orthod, 2013, 83(2):212-221
[16]	Handelman CS.The anterior alveolus: its importance in limiting orthodontic treatment and its influence on the occurrence of iatrogenic sequelae[J].Angle Orthod, 1996, 66(2):95-110
[17]	Bae SM, Kim HJ, Kyung HM.Long-term changes of the anterior palatal alveolar bone after treatment with bialveolar protrusion,evaluated with computed tomography[J].Am J Orthod Dentofacial Orthop, 2018, 153(1):108-117
[18]	廖妮, 周诺, 莫水学.骨性Ⅱ类不同垂直骨面型患者切牙牙槽骨形态特征的CBCT研究[J].实用口腔医学杂志, 2015, 31( 4):556-559