The Journal of Advanced Prosthodontics

The Korean Academy of Prosthodonitics (대한치과보철학회)
권호 표지
DOI QR코드

DOI QR Code

Biometry of width between labial transitional line angles in anterior teeth: an observational study

  • Wen, Chao (Center of Digital Dentistry, Department of Prosthodontics, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices& Beijing Key Laboratory of Digital Stomatology & Research Center of Engineering and Technology for Computerized Dentistry Ministry of Health) ;
  • Ye, Hongqiang (Department of Prosthodontics, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices & Beijing Key Laboratory of Digital Stomatology) ;
  • Chen, Hu (Center of Digital Dentistry, Department of Prosthodontics, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices& Beijing Key Laboratory of Digital Stomatology & Research Center of Engineering and Technology for Computerized Dentistry Ministry of Health) ;
  • Zhou, Yongsheng (Department of Prosthodontics, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices & Beijing Key Laboratory of Digital Stomatology) ;
  • Huang, Mingming (Center of Digital Dentistry, Department of Prosthodontics, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices& Beijing Key Laboratory of Digital Stomatology & Research Center of Engineering and Technology for Computerized Dentistry Ministry of Health) ;
  • Sun, Yuchun (Center of Digital Dentistry, Department of Prosthodontics, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices& Beijing Key Laboratory of Digital Stomatology & Research Center of Engineering and Technology for Computerized Dentistry Ministry of Health)
  • Received : 2021.08.14
  • Accepted : 2022.02.07
  • Published : 2022.02.28
Download PDF
⟨ Previous Next ⟩

Abstract

PURPOSE. The maximum width between the mesial and distal labial transitional line angles, described as "esthetic width" herein, could significantly influence the visual perception of the teeth and smile. This study aimed to conduct biometric research on esthetic width and to explore whether regular distribution exists in the esthetic width of human teeth. MATERIALS AND METHODS. A total of 4,264 maxillary and mandibular anterior teeth were measured using the Geomagic studio software program. The proportions of maxillary to mandibular homonymous teeth and proportions between the adjacent teeth were calculated. Bilateral symmetry and the correlation between the esthetic and mesiodistal widths were both accounted for during the measurement procedures. RESULTS. The mean esthetic widths were 6.773 ± 0.518 mm and 4.329 ± 0.331 mm for maxillary and mandibular central incisors, respectively, 5.451 ± 0.487 mm and 5.008 ± 0.351 mm for maxillary and mandibular lateral incisors, respectively, and 3.340 ± 0.353 mm and 5.958 ± 0.415 mm for maxillary and mandibular canines, respectively. Except for the mandibular canines, no significant difference in esthetic width was found among homonymous teeth from the same jaw. A high linear correlation was found between the esthetic and mesiodistal widths of the same tooth, except for the maxillary canines. Esthetic width proportions among different tooth categories showed some regular patterns, which were similar to those of the mesiodistal width. CONCLUSION. Esthetic width is regularly distributed among the teeth in the Chinese population. This could provide an important reference for anterior dental restorations and dimension recovery in esthetic reconstruction of anterior teeth.

Keywords

Acknowledgement

We thank Mr. Weiqiu Zhong for his contribution to the conception of this study.

References

  1. Ness JC. Vertical transitional line angles. In: Mark L, James M, editors. Anterior anatomy & the science of a natural smile. Morgan Hill; Productivity Training Corporation; 2015. p. 53.
  2. Fradeani M, Barducci G. Tooth analysis. In: Fradeani M, editor. Esthetic rehabilitation in fixed prosthodontics, vol 1. Chicago; Quintessence Publishing Co; 2004. p. 170.
  3. Riquieri H. The esthetic and functional parameters of anterior teeth. In: Grisham B, editor. Dental anatomy and morphology. Batavia (IL); Quintessence Publishing Co.; 2018. p. 251-9.
  4. Schwartz-Arad D. Smile design. In: Schwartz-Aradm D, editor. Esthetics in Dentistry. London; Quintessence Publishing Co; 2016. p. 51-5.
  5. Peyton JH, Gilbert BJ. "Get in line": Tips to create ideal line angles (Accreditation case types IV & V). J Cosmet Dent 2018;34:24-7.
  6. American Academy of Cosmetic Dentistry (AACD). A guide to Accreditation criteria: contemporary concepts in smile design-diagnosis and treatment evaluation in comprehensive cosmetic dentistry. Madison (WI): AACD; 2014. p. 22.
  7. Gurel G. Smile design. In: Gurel G, editor. The science and art of porcelain laminate veneers. London; Quintessence Publishing Co; 2003. p. 82, 89.
  8. Gallucci GO, Guex P, Vinci D, Belser UC. Achieving natural-looking morphology and surface textures in anterior ceramic fixed rehabilitations. Int J Periodontics Restorative Dent 2007;27:117-25.
  9. Belser U, Gallucci G, Afrashtehfar KI, Buser D. Prosthetically driven techniques to compensate peri-implant soft tissue deficiencies. Forum Implantologicum 2016;12:86-97.
  10. Peyton JH, Arnold JF. Six or more direct resin veneers case for accreditation: Hands-on typodont exercise. J Cosmet Dent 2008;24:38-48.
  11. Magne P, Belser U. Natural oral esthetics. In: Magne P, Belser U, editors. Bonded porcelain restorations in the anterior dentition: a biomimetic approach. Chicago; Quintessence Publishing Co; 2002. p. 71.
  12. Sesemann MR. Appropriate line angles to optimize smile design restorations. J Cosmet Dent 2017;33:66-75.
  13. Goldstein RE, Kim JJ, Adar P, Mieleszko. Creating esthetic restorations through special effects. In: Goldstein RE, Chu SJ, Lee EA, Stappert CFJ, editors. Ronald E. Goldstein's esthetics in dentistry. Hoboken; Wiley-Blackwell; 2018, p. 207.
  14. Scotti CK, Bastos NA, Velo MM, Zabeu GS, Bueno LS, Bombonatti JF, Mondelli RF. Understanding the interaction of resin composite with light for predictable aesthetic results in anterior teeth: A case report. Brazilian Dent Sci 2018;21:257-65. https://doi.org/10.14295/bds.2018.v21i2.1547
  15. Abduo J, Bennamoun M, Tennant M, McGeachie J. Impact of digital prosthodontic planning on dental esthetics: Biometric analysis of esthetic parameters. J Prosthet Dent 2016;115:57-64. https://doi.org/10.1016/j.prosdent.2015.07.005
  16. Koo TK, Li MY. A guideline of selecting and reporting intraclass correlation coefficients for reliability research. J Chiropr Med 2016;15:155-63. https://doi.org/10.1016/j.jcm.2016.02.012
  17. Orozco-Varo A, Arroyo-Cruz G, Martinez-de-Fuentes R, Jimenez-Castellanos E. Biometric analysis of the clinical crown and the width/length ratio in the maxillary anterior region. J Prosthet Dent 2015;113:565-70.e2. https://doi.org/10.1016/j.prosdent.2014.11.006
  18. Melo M, Ata-Ali F, Huertas J, Cobo T, Shibli JA, Galindo-Moreno P, Ata-Ali J. Revisiting the maxillary teeth in 384 subjects reveals a deviation from the classical aesthetic dimensions. Sci Rep 2019;9:730. https://doi.org/10.1038/s41598-018-36770-w
  19. Parciak EC, Dahiya AT, AlRumaih HS, Kattadiyil MT, Baba NZ, Goodacre CJ. Comparison of maxillary anterior tooth width and facial dimensions of 3 ethnicities. J Prosthet Dent 2017;118:504-10. https://doi.org/10.1016/j.prosdent.2016.10.035
  20. Scott GR, Irish JD. Conclusions. In: Scott GR, Irish JD, editors. Human tooth crown and root morphology (the Arizona State Universtiy dental anthropology system). Cornwall; Cambridge University Press; 2017. p. 40, 257.
  21. Murugesan A, Sivakumar A. Comparison of accuracy of mesiodistal tooth measurements made in conventional study models and digital models obtained from intraoral scan and desktop scan of study models. J Orthod 2020;47:149-55. https://doi.org/10.1177/1465312520910755
  22. Kieser JA, Groeneveld HT. Fluctuating odontometric asymmetry in an urban South African black population. J Dent Res 1988;67:1200-5. https://doi.org/10.1177/00220345880670091001
  23. Guatelli-Steinberg D, Sciulli PW, Edgar HH. Dental fluctuating asymmetry in the Gullah: tests of hypotheses regarding developmental stability in deciduous vs. permanent and male vs. female teeth. Am J Phys Anthropol 2006;129:427-34. https://doi.org/10.1002/ajpa.20237
  24. Saboia TM, Tannure PN, Luiz RR, de Castro Costa M, Granjeiro JM, Kuchler EC, Antunes LS. Sexual dimorphism involved in the mesiodistal and buccolingual dimensions of permanent teeth. Dentistry 3000 2013;1;2-6. https://doi.org/10.5195/d3000.2013.10
  25. Van Dongen S, Gangestad SW. Human fluctuating asymmetry in relation to health and quality: a meta-analysis. Evol Hum Behav 2011;32:380-98. https://doi.org/10.1016/j.evolhumbehav.2011.03.002
  26. Koidou VP, Chatzopoulos GS, Rosenstiel SF. Quantification of facial and smile esthetics. J Prosthet Dent 2018;119:270-7. https://doi.org/10.1016/j.prosdent.2017.04.002
  27. Rawlani SM, Rawlani SS, Bhowate RR, Chandak RM. Racial characteristics of human teeth. Int J Forensic Odontol 2017;2:38-42. https://doi.org/10.4103/ijfo.ijfo_21_16
  28. Kalistu S, Doggalli N, Patil K, Rudraswamy S. Race determination based on nonmetric teeth morphological traits. SRM J Res Dent Sci 2019;10:233-8. https://doi.org/10.4103/srmjrds.srmjrds_52_19
  29. Garn SM, Lewis AB, Kerewsky RS. Relationship between buccolingual and mesiodistal tooth diameters. J Dent Res 1968;47:495. https://doi.org/10.1177/00220345680470032601
  30. Hillson S, Fitzgerald C, Flinn H. Alternative dental measurements: proposals and relationships with other measurements. Am J Phys Anthropol 2005;126:413-26. https://doi.org/10.1002/ajpa.10430
  31. Kimura R, Yamaguchi T, Takeda M, Kondo O, Toma T, Haneji K, Hanihara T, Matsukusa H, Kawamura S, Maki K, Osawa M, Ishida H, Oota H. A common variation in EDAR is a genetic determinant of shovel-shaped incisors. Am J Hum Genet 2009;85:528-35. https://doi.org/10.1016/j.ajhg.2009.09.006
  32. Park JH, Yamaguchi T, Watanabe C, Kawaguchi A, Haneji K, Takeda M, Kim YI, Tomoyasu Y, Watanabe M, Oota H, Hanihara T, Ishida H, Maki K, Park SB, Kimura R. Effects of an Asian-specific nonsynonymous EDAR variant on multiple dental traits. J Hum Genet 2012;57:508-14. https://doi.org/10.1038/jhg.2012.60