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Journal of Peking University (Health Sciences) ›› 2022, Vol. 54 ›› Issue (1): 193-199. doi: 10.19723/j.issn.1671-167X.2022.01.031

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Preliminary clinical application verification of complete digital workflow of design lips symmetry reference plane based on posed smile

QIU Shu-ting1,ZHU Yu-jia1,2,WANG Shi-min3,WANG Fei-long1,YE Hong-qiang1,ZHAO Yi-jiao1,2,△(),LIU Yun-song1,△(),WANG Yong1,2,ZHOU Yong-sheng1   

  1. 1. Department of Prosthodontics, Peking University School and Hospital of Stomatology, Beijing 100081, China
    2. Center of Digital Dentistry, Peking University School and Hospital of Stomatology, Beijing 100081, China
    3. Center of Dental Laboratory, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing 100081, China
  • Received:2021-10-08 Online:2022-02-18 Published:2022-02-21
  • Contact: Yi-jiao ZHAO,Yun-song LIU E-mail:kqcadcs@bjmu.edu.cn;liuyunsong@hsc.pku.edu.cn
  • Supported by:
    National Program for Multidisciplinary Cooperative Treatment on Major Diseases(PKUSSNMP-202004);National Natural Science Foundation of China(82071171);Lanzhou Innovative Talents Foundation(2019-RC-22)

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Abstract:

Objective: To automatically construct lips symmetry reference plane (SRP) based on posed smile, and to evaluate its advantages over conventional digital aesthetic design. Methods: Eighteen subjects’ three-dimensional facial and dentition data were gathered in this study. The lips SRP of experimental groups were used with the standard weighted Procrustes analysis (WPA) algorithm and iterative closest point (ICP), respectively. A reference plane defined by experts based on regional ICP algorithm, served as the truth plane. The angle error values between the lips SRP of WPA algorithm in the experimental groups and the truth plane were evaluated in this study, and the lips SRP of ICP algorithm of the experimental groups was calculated in the same way. The lips SRP based on posed smile as a reference for aesthetic design and evaluate preliminary clinical application. Results: The average angle error between the lips SRP of WPA algorithm and the truth plane was 1.78°±1.24°, which was smaller than that between the lips SRP of ICP and the truth plane 7.41°±4.31°. There were significant differences in the angle errors among the groups (P<0.05). In the aesthetic design of anterior teeth, automatically constructing the lips SRP of WPA algorithm based on posed smile and the original symmetry plane by re-ference compared with the prosthetic design, the subjects’ scores on the lips SRP of WPA algorithm based on posed smile (8.48±0.57) were higher than those on the original symmetry plane (5.20±1.31). Conclusion: Automatically constructing the lips SRP of WPA algorithm based on posed smile was more accurate than ICP algorithm, which was consistent with the truth plane. Moreover, it can provide an important reference for oral aesthetic diagnosis and aesthetic analysis of the restoration effect. In the aesthetic design of anterior teeth, automatically constructing the lips SRP of WPA algorithm based on posed smile can improve the patients’ satisfaction in esthetic rehabilitation.

Key words: Dental esthetics, Facial asymmetry, Imaging, three-dimensional, Computer-aided design

CLC Number: 

  • R783

Figure 1

Three dimensional facial data acquisition process of posed smile"

Figure 2

Scanning data of 3D digital dentition model"

Figure 3

Eight anatomic landmarks used in this study Sn, sbunasale; Mp, mid philtrum; Ls, labial superius; Li, labial infe-rius; RCph, right christa philtra; LCph, left christa philtra; RCh, right cheilion; LCh, left cheilion."

Figure 4

Abstracting the symmetry reference plane based on WPA algorithm, ICP algorithm, and truth plane of a subject Green plane represents WPA algorithm, yellow plane represents ICP algorithm, red plane signifies truth plane(TP). WPA, weighted Procrustes analysis; ICP, iterative closest point."

Figure 5

Design of digital aesthetic restoration A, abstracting the symmetry reference plane based on WPA algorithm (green plane); B, three-dimensional prediction of esthetic outcome based on conventional digital design; C, three-dimensional prediction of esthetic outcome based on WPA. WPA, weighted Procrustes analysis."

Table 1

The angle error of SRP based on WPA and ICP algorithm"

Subject Angle error/(°) Subject Angle error/(°)
WPA ICP WPA ICP
1 2.42 10.50 10 0.86 14.16
2 3.58 6.13 11 1.93 6.82
3 4.56 8.80 12 3.21 12.52
4 1.09 7.37 13 0.16 2.15
5 0.59 2.27 14 0.06 0.43
6 1.82 6.80 15 0.78 3.15
7 0.98 17.12 16 1.25 6.58
8 3.12 7.26 17 2.16 9.70
9 1.06 4.39 18 2.39 7.24

Figure 6

The average angle error of SRP based on WPA and ICP algorithm WPA, weighted Procrustes analysis; ICP, iterative closest point."

Figure 7

The average score based on WPA and OSP algorithm WPA, weighted Procrustes analysis; OSP, original symmetry plane."

[1] Havens DC, Mcnamara JA, Sigler LM, et al. The role of the posed smile in overall facial esthetics[J]. Angle Orthod, 2010, 80(2):322-328.
doi: 10.2319/040409-194.1 pmid: 19905858
[2] van der Geld P, Oosterveld P, Kuijpers-Jagtman AM. Age-related changes of the dental aesthetic zone at rest and during spontaneous smiling and speech[J]. Eur J Orthod, 2008, 30(4):366-373.
doi: 10.1093/ejo/cjn009
[3] Kokich V. Esthetics and anterior tooth position: An orthodontic perspective. Part Ⅲ: Mediolateral relationships[J]. J Esthet Dent, 1993, 5(5):200-207.
pmid: 8037970
[4] Haraguchi S, Iguchi Y, Takada K. Asymmetry of the face in orthodontic patients[J]. Angle Orthod, 2008, 78(3):421-426.
doi: 10.2319/022107-85.1 pmid: 18416611
[5] O’Grady KF, Antonyshyn OM. Facial asymmetry: Three-dimensional analysis using laser surface scanning[J]. Plast Reconstr Surg, 1999, 104(4):928-937.
doi: 10.1097/00006534-199909020-00006
[6] Momi ED, Chapuis J, Pappas I, et al. Automatic extraction of the mid-facial plane for cranio-maxillofacial surgery planning[J]. Int J Oral Maxillofac Surg, 2006, 35(7):636-642.
doi: 10.1016/j.ijom.2006.01.028
[7] Du S, Xu Y, Wan T, et al. Robust iterative closest point algorithm based on global reference point for rotation invariant registration[J]. PLoS One, 2017, 12(11):e0188039.
doi: 10.1371/journal.pone.0188039
[8] Verhoeven TJ, Nolte JW, Maal TJJ, et al. Unilateral condylar hyperplasia: A 3-dimensional quantification of asymmetry[J]. PLoS One, 2013, 8(3):e59391.
doi: 10.1371/journal.pone.0059391
[9] Gateno J, Jajoo A, Nicol M, et al. The primal sagittal plane of the head: A new concept[J]. Int J Oral Maxillofac Surg, 2016, 45(3):399-405.
doi: 10.1016/j.ijom.2015.11.013
[10] Chetverikov D, Stepanov D, Krsek P. Robust Euclidean alignment of 3D point sets: The trimmed iterative closest point algorithm[J]. Image Vis Comput, 2005, 23(3):299-309.
doi: 10.1016/j.imavis.2004.05.007
[11] 朱玉佳, 赵一姣, 郑盛文, 等. 基于赋权形态学分析的三维面部对称参考平面构建方法[J]. 北京大学学报(医学版), 2021, 53(1):220-226.
[12] 李立美, 李风兰, 杨红霞. 140名山西籍青年人微笑美学定性指标初步分析[J]. 口腔颌面修复学杂志, 2021, 22(2):129-133.
[13] 徐成华, 王蕴红, 谭铁牛. 三维人脸建模与应用[J]. 中国图象图形学报, 2004, 9(8):1-11.
[14] 刘云松, 叶红强, 谷明, 等. 患者参与的数字化设计在前牙美学修复中的应用[J]. 北京大学学报(医学版), 2014, 46(1):90-94.
[15] Zhao JM, Ji LL, Han MQ, et al. Lip morphology estimation models based on three-dimensional images in a modern adult population from China[J]. Int J Legal Med, 2021, 135(5):1887-1901.
doi: 10.1007/s00414-021-02559-2
[16] Zhu Y, Zheng S, Yang G, et al. A novel method for 3D face symmetry reference plane based on weighted Procrustes analysis algorithm[J]. BMC Oral Health, 2020, 20(1):319.
doi: 10.1186/s12903-020-01311-3
[17] 叶红强, 柳玉树, 王冠博, 等. 三维数字化仿真设计与实现技术在前牙美学修复中的应用[J]. 中华口腔医学杂志, 2020, 55(10):729-736.
[18] 骆小平. 数字化技术在牙科全瓷美学修复中的应用[J]. 中国实用口腔科杂志, 2017, 10(8):449-451.
[19] McNamara L, McNamara JA Jr, Ackerman MB, et al. Hard- and soft-tissue contributions to the esthetics of the posed smile in growing patients seeking orthodontic treatment[J]. Am J Orthod Dentofacial Orthop, 2008, 133(4):491-499.
doi: 10.1016/j.ajodo.2006.05.042
[20] 王时敏, 李峥, 王冠博, 等. 全程数字化夜磨牙保护牙合垫的制作和初步应用[J]. 北京大学学报(医学版), 2019, 51(1):105-110.
[21] Sun KM, Joo LE, Song IJ, et al. The location of midfacial landmarks according to the method of establishing the midsagittal reference plane in three-dimensional computed tomography analysis of facial asymmetry[J]. Imaging Sci Dent, 2015, 45(4):227-232.
doi: 10.5624/isd.2015.45.4.227
[22] Young CK. Analysis of facial asymmetry[J]. Arch Craniofac Surg, 2015, 16(1):1-10.
doi: 10.7181/acfs.2015.16.1.1 pmid: 28913211
[23] 黄佳梦, 李娟, 林军. 面部不对称畸形评估的研究进展[J]. 中国医疗美容, 2019, 9(6):121-128.
[24] 米雁翎, 西文琼, 邓延伟, 等. 骨性Ⅲ类错伴骨性偏颌的正畸-正颌联合治疗[J]. 中华口腔医学杂志, 2019, 54(6):391-395.
[25] 胡祥莹, 肖燕, 王璧霞, 等. 成人错牙合畸形患者正颌手术治疗决策的质性研究[J]. 上海口腔医学, 2019, 28(5):513-517.
[26] Silva BP, Jiménez-Castellanos E, Finkel S, et al. Layperson’s preference regarding orientation of the transverse occlusal plane and commissure line from the frontal perspective[J]. J Prosthet Dent, 2016, 117(4):513-516.
doi: 10.1016/j.prosdent.2016.07.027
[27] Silva BP, Mahn E, Stanley K, et al. The facial flow concept: An organic orofacial analysis, the vertical component[J]. J Prosthet Dent, 2018, 121(2):189-194.
doi: 10.1016/j.prosdent.2018.03.023
[28] Koseoglu M, Bayindir F. Effect of variations in facial flow curves on the perceptions of smile esthetics by laypeople [J]. J Prosthet Dent, 2021, S0022-3913(21)00320-6.
[29] Gibelli D, Pucciarelli V, Poppa P, et al. Three-dimensional facial anatomy evaluation: Reliability of laser scanner consecutive scans procedure in comparison with stereophotogrammetry[J]. J Craniomaxillofac Surg, 2018, 46(10):1807-1813.
doi: 10.1016/j.jcms.2018.07.008
[30] Wu J, Heike C, Birgfeld C, et al. Measuring symmetry in children with unrepaired cleft lip: Defining a standard for the three-dimensional midfacial reference plane[J]. Cleft Palate Craniofac J, 2016, 53(6):695-704.
doi: 10.1597/15-053
[31] 卢长宝, 黄桂艳. 过多选择效应:概念演化、发生前提及行为决策机制[J]. 北京工商大学学报(社会科学版), 2017, 32(5):108-117.
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