隐形矫治器厚度与附件对尖牙远移效率的三维有限元分析

Abstract

Abstract:

Objective To analyze the effects of different clear aligner thicknesses and attachment designs on the distal movement of the maxillary canine using the three-dimensional finite element method. Methods Based on imaging data from a patient treated in the Department of Orthodontics, Stomatology Hospital, Zhejiang University School of Medicine in 2023, a three-dimensional finite element model was established simulating the extraction of the maxillary first premolar and distal movement of the maxillary canine. Nine groups (A-I) were created according to aligner thickness (0.70 mm, 0.75 mm, 0.80 mm) and attachment type (no attachment, vertical rectangular attachment, torque control attachment). Stress distribution in the tooth and periodontal ligament, as well as three-dimensional displacement trends of the canine, were analyzed. Results Stress distribution was relatively uniform in all models without significant concentration. The canine exhibited distal tipping movement accompanied by palatal and intrusive displacement. Under the same attachment condition, the 0.75 mm aligner achieved the greatest distal movement. With the same aligner thickness, the torque control attachment group showed the smallest tipping angle, while the vertical rectangular attachment group achieved greater distal movement and optimal vertical control. The no-attachment group exhibited the largest displacement in both buccolingual and vertical directions. Conclusion The 0.75 mm thick aligner demonstrated the most sufficient displacement expression and the highest achievement rate of distal movement. Adding attachments significantly improved the efficiency of bodily tooth movement. Movement under the torque control attachment was closest to pure translation, while the vertical rectangular attachment provided a higher rate of distal movement and better vertical control.

Key words: invisible orthodontics, attachment, thickness, canine, three-dimensional finite element analysis

CLC Number:

R783.5

LIANG Xiaolun, ZHANG Menghan, ZHANG Wenzhe, WU Mengjie. Three-dimensional finite element analysis of the effect of clear aligner thickness and attachments on the efficiency of canine distalization[J]. Stomatology, 2026, 46(6): 409-415.

Figures/Tables 11

Fig.1

Tab.1

Fig.2

Fig.3

Fig.4

Fig.5

Fig.6

Fig.7

Tab.2

Tab.3

Tab.4

References 28

[1]	Kravitz ND, Kusnoto B, BeGole E, et al. How well does Invisalign work? A prospective clinical study evaluating the efficacy of tooth movement with Invisalign[J]. Am J Orthod Dentofac Orthop, 2009, 135(1): 27-35. doi: 10.1016/j.ajodo.2007.05.018
[2]	马晓晴, 项飞, 樊明月, 等. 微种植钉辅助无托槽隐形矫治器控制“过山车”效应的疗效分析[J]. 上海口腔医学, 2022, 31(2):193-197.
[3]	徐小红, 张阳, 张梦男, 等. 成年拔牙患者隐形矫治牙齿移动效率的三维测量分析[J]. 口腔生物医学, 2021, 12(4):252-256.
[4]	Xia Q, He Y, Jia LR, et al. Assessment of labially impacted canines traction mode with clear aligners vs. fixed appliance: A comparative study based on 3D finite element analysis[J]. Front Bioeng Biotechnol, 2022, 10: 1004223. doi: 10.3389/fbioe.2022.1004223
[5]	Hong K, Kim WH, Eghan-Acquah E, et al. Efficient design of a clear aligner attachment to induce bodily tooth movement in orthodontic treatment using finite element analysis[J]. Materials, 2021, 14(17): 4926. doi: 10.3390/ma14174926
[6]	Liu L, Song QX, Zhou J, et al. The effects of aligner overtreat-ment on torque control and intrusion of incisors for anterior retraction with clear aligners: A finite-element study[J]. Am J Orthod Dentofac Orthop, 2022, 162(1): 33-41. doi: 10.1016/j.ajodo.2021.02.020
[7]	Cheng YX, Liu XL, Chen X, et al. The three-dimensional displacement tendency of teeth depending on incisor torque compensation with clear aligners of different thicknesses in cases of extraction: A finite element study[J]. BMC Oral Health, 2022, 22(1): 499. doi: 10.1186/s12903-022-02521-7 pmid: 36384512
[8]	Nucera R, Dolci C, Bellocchio AM, et al. Effects of composite attachments on orthodontic clear aligners therapy: A systematic review[J]. Materials, 2022, 15(2): 533. doi: 10.3390/ma15020533
[9]	Luu B, Cronauer EA, Gandhi V, et al. A finite element approach for locating the center of resistance of maxillary teeth[J]. JoVE, 2020, 158: e60746.
[10]	Yoshida N, Koga Y, Peng CL, et al. Measurement of the elastic modulus of the human periodontal ligament[J]. Med Eng Phys, 2001, 23(8): 567-572. pmid: 11719079
[11]	张宁, 白玉兴, 张昆亚, 等. 不同厚度热压膜材料的力学性能研究[J]. 北京口腔医学, 2009, 17(4):184-186.
[12]	邢锐. 不同厚度无托槽隐形矫治器矫治应变力学效果研究[J]. 中国医药科学, 2014, 4(23):167-169.
[13]	吴晓君, 曾裕文, 熊国平. 无托槽矫治伴牙槽骨吸收倾斜上切牙的有限元分析及最佳矫治器厚度探讨[J]. 临床口腔医学杂志, 2021, 37(10):583-586.
[14]	Seo JH, Eghan-Acquah E, Kim MS, et al. Comparative analysis of stress in the periodontal ligament and center of rotation in the tooth after orthodontic treatment depending on clear aligner thickness: Finite element analysis study[J]. Materials, 2021, 14(2): 324. doi: 10.3390/ma14020324
[15]	Liu L, Zhan Q, Zhou J, et al. Effectiveness of an anterior mini-screw in achieving incisor intrusion and palatal root torque for anterior retraction with clear aligners[J]. Angle Orthod, 2021, 91(6): 794-803. doi: 10.2319/120420-982.1 pmid: 34061964
[16]	Jiang T, Wu RY, Wang JK, et al. Clear aligners for maxillary anterior en masse retraction: A 3D finite element study[J]. Sci Rep, 2020, 10: 10156. doi: 10.1038/s41598-020-67273-2 pmid: 32576935
[17]	Li YX, Xiao SZ, Jin Y, et al. Stress and movement trend of lower incisors with different IMPA intruded by clear aligner: A three-dimensional finite element analysis[J]. Prog Orthod, 2023, 24(1): 5. doi: 10.1186/s40510-023-00454-7 pmid: 36775824
[18]	许诺. 无托槽隐形矫治器不同附件远移上颌尖牙的三维有限元分析[D]. 兰州: 兰州大学, 2018.
[19]	程亚男, 于佳志, 刘印倡, 等. 不同厚度与边缘无托槽隐形矫治器推磨牙远移的三维有限元分析[J]. 中国组织工程研究, 2026, 30(2):310-318.
[20]	曹熔锴, 陈孛蓓, 李琼, 等. 应用3D数字化面部重建评估上颌尖牙垂直位置对微笑美学的影响[J]. 上海口腔医学, 2020, 29(6):611-616.
[21]	Sachdev S, Tantidhnazet S, Saengfai NN. Accuracy of tooth movement with in-house clear aligners[J]. J World Fed Orthod, 2021, 10(4): 177-182. doi: 10.1016/j.ejwf.2021.08.003 pmid: 34625386
[22]	Haouili N, Kravitz ND, Vaid NR, et al. Has Invisalign improved? A prospective follow-up study on the efficacy of tooth movement with Invisalign[J]. Am J Orthod Dentofac Orthop, 2020, 158(3): 420-425. doi: 10.1016/j.ajodo.2019.12.015
[23]	Giancotti A, Greco M, Mampieri G. Extraction treatment using Invisalign technique[J]. Prog Orthod, 2006, 7(1): 32-43. pmid: 16552454
[24]	Hartshorne J, Wertheimer MB. Emerging insights and new developments in clear aligner therapy: A review of the literature[J]. Clin Companion, 2022, 2(4): 311-324.
[25]	杨斌, 白玉兴. 两种矫治技术治疗牙周病患者牙周组织应力的对比分析[J]. 现代口腔医学杂志, 2009, 23(3):232-234.
[26]	方群智. 不同矫治器膜片参数对无托槽隐形矫治技术远中移动上颌尖牙影响的三维有限元分析[D]. 杭州: 浙江中医药大学, 2022.
[27]	Gomez JP, Peña FM, Martínez V, et al. Initial force systems during bodily tooth movement with plastic aligners and composite attachments: A three-dimensional finite element analysis[J]. Angle Orthod, 2015, 85(3): 454-460. doi: 10.2319/050714-330.1 pmid: 25181252
[28]	鞠博, 李德水, 刘盼盼, 等. 隐适美矫治器矩形附件与优化附件远移尖牙效率的对比研究[J]. 山东大学学报(医学版), 2019, 57(4):101-105.

材料	弹性模量/MPa	泊松比
牙周膜	0.69	0.45
牙体	1.96×10⁴	0.30
牙槽骨	1.37×10³	0.30
隐形矫治器	5.28×10²	0.36
附件	1.25×10⁴	0.36

分组	牙尖点	根尖点	近中点	远中点
0.70 mm无附件	-0.234	-0.013	-0.219	-0.168
0.75 mm无附件	-0.235	0.054	-0.217	-0.162
0.80 mm无附件	-0.210	0.003	-0.198	-0.148
0.70 mm垂直矩形附件	-0.218	-0.047	-0.208	-0.169
0.75 mm垂直矩形附件	-0.245	-0.018	-0.224	-0.180
0.80 mm垂直矩形附件	-0.208	-0.035	-0.194	-0.156
0.70 mm控根附件	-0.199	-0.093	-0.194	-0.170
0.75 mm控根附件	-0.212	-0.060	-0.201	-0.167
0.80 mm控根附件	-0.209	-0.057	-0.198	-0.164

分组	牙尖点	根尖点	近中点	远中点
0.70 mm无附件	0.052	0.145	0.028	0.120
0.75 mm无附件	0.059	0.186	0.033	0.131
0.80 mm无附件	0.062	0.132	0.032	0.124
0.70 mm垂直矩形附件	0.063	0.090	0.037	0.108
0.75 mm垂直矩形附件	0.044	0.082	0.023	0.084
0.80 mm垂直矩形附件	0.067	0.097	0.044	0.107
0.70 mm控根附件	0.066	0.115	0.050	0.111
0.75 mm控根附件	0.055	0.129	0.034	0.104
0.80 mm控根附件	0.065	0.141	0.044	0.114

分组	牙尖点	根尖点	近中点	远中点
0.70 mm无附件	0.175	0.164	0.134	0.206
0.75 mm无附件	0.230	0.219	0.179	0.275
0.80 mm无附件	0.211	0.203	0.175	0.246
0.70 mm垂直矩形附件	0.122	0.120	0.094	0.150
0.75 mm垂直矩形附件	0.091	0.084	0.050	0.129
0.80 mm垂直矩形附件	0.125	0.112	0.092	0.148
0.70 mm控根附件	0.134	0.131	0.118	0.150
0.75 mm控根附件	0.128	0.121	0.101	0.147
0.80 mm控根附件	0.137	0.131	0.111	0.157

Three-dimensional finite element analysis of the effect of clear aligner thickness and attachments on the efficiency of canine distalization

RichHTML

PDF (PC)

Knowledge

Abstract

Cite this article

share this article

Figures/Tables 11

References 28

Related Articles 15

Recommended Articles

Metrics

Comments

[1]	BI Mengfei, DAI Shuyue, CHEN Jian, ZHOU Yiyi, SHEN Ming. Three-dimensional finite element analysis of the biomechanical behavior of maxillary anterior implant-supported restorations with different palatal cervical bone plate thicknesses under traumatic loading [J]. Stomatology, 2026, 46(5): 344-349.
[2]	DOU Chenyun, SHEN Wenjing, WANG Jinmei, LI Beibei, ZHEN Penglong, MENG Lingqiang. Analysis of different implant implantation methods and changes of alveolar crest vertical membrane thickness [J]. Stomatology, 2025, 45(8): 603-607.
[3]	ZHAO Yanfang, ZHANG Chunbao, LIU Huan, LI Kai, XIN Haitao, HU Jiahuan, WU Yulu. Accuracy of 3D printed models created by different designs of wall thickness [J]. Stomatology, 2025, 45(7): 502-505.
[4]	ZHANG Xiya, BI Mengfei, LI Feifan, WU Meiqi, SHEN Ming. The 3D finite element study on implant restoration in the maxillary anterior region with different palatal bone plate thicknesses [J]. Stomatology, 2025, 45(7): 506-510.
[5]	WU Zhengmin, ZHANG Yong, YANG Ying, ZHANG Fangming. Analysis of stress distribution in different lateral occlusion patterns of All-on-4 fixed denture: A three-dimensional finite element study [J]. Stomatology, 2025, 45(3): 180-184.
[6]	ZHAO Xi, YANG Li. Three-dimensional finite element analysis of the optimal attachment position for clear aligners of the lower canine [J]. Stomatology, 2025, 45(3): 197-203.
[7]	PAN Xinni, SUN Yi, XU Yuedan, LIN Ye, ZHANG Ling. Research progress of lateral occlusion scheme selection during natural dentition reconstruction [J]. Stomatology, 2025, 45(3): 229-234.
[8]	ZHANG Chi, DIAO Pengfei, WU Yaping, LI Jin, LIU Xue, WANG Dongmiao. Analysis of epidemiological, radiological and clinical features associated with transmigrated mandibular canines [J]. Stomatology, 2025, 45(2): 95-99.
[9]	ZHANG Chi, ZHANG Leheng, XU Youran, ZHAI Fengyang, ZHANG Peiyu, PIAO Liying, HAN Minxuan, LOU Shu. Three-dimensional finite element analysis of the mechanical effects of different heights of micro-implant anchorage on maxillary anterior teeth retraction in clear aligner treatment [J]. Stomatology, 2025, 45(10): 742-748.
[10]	ZHANG Jiashun, REN Lei, ZHENG Ze, ZHANG Miaomiao. Measurement and analysis of the alveolar bone in the maxillary canine region of adults with different sagittal skeletal patterns using CBCT [J]. Stomatology, 2025, 45(10): 749-753.
[11]	CHEN Yingying, WU Wenli, SHEN Ming. Radiological measurement and analysis of aesthetic implantation in maxillary incisor positions [J]. Stomatology, 2024, 44(6): 421-425.
[12]	SU Jingyuan, XIAO Tian, LEI Jie, GUO Jie. Research progress of the attachment application in clear aligner treatment [J]. Stomatology, 2024, 44(4): 297-302.
[13]	MIAO Shiwei, YAN Qinyue, HU Danyan, CAO Dan, Izadikhah Iman, YAN Bin. Morphological anomalies of sella turcica patients with maxillary impacted canines: A cone-beam computed tomography study [J]. Stomatology, 2024, 44(2): 105-109.
[14]	FAN Siyu, XUE Yiwen, SONG Xiao, DENG Runzhi, HAO Jing. Study on clinical characteristics of impacted maxillary canine-linked incisor root resorption [J]. Stomatology, 2023, 43(7): 638-642.
[15]	CHEN Jingjing,LI Shuya,LIU Tengda,WANG Shuhong. Application and research progress of supracrestal soft tissue around implants [J]. Stomatology, 2023, 43(5): 476-480.