Hostname: page-component-586b7cd67f-2plfb Total loading time: 0 Render date: 2024-11-26T13:08:36.300Z Has data issue: false hasContentIssue false
  • English
  • Français

Metric Analyses of the Teeth and Faces of South Australian Twins

Published online by Cambridge University Press:  01 August 2014

G.C. Townsend ,
T. Brown ,
L.C. Richards ,
J.R. Rogers ,
S.K. Pinkerton ,
G.R. Travan  and
V.B. Burgess
G.C. Townsend*
Affiliation:
Department of Dentistry, University of Adelaide, South Australia
T. Brown
Affiliation:
Department of Dentistry, University of Adelaide, South Australia
L.C. Richards
Affiliation:
Department of Dentistry, University of Adelaide, South Australia
J.R. Rogers
Affiliation:
Department of Dentistry, University of Adelaide, South Australia
S.K. Pinkerton
Affiliation:
Department of Dentistry, University of Adelaide, South Australia
G.R. Travan
Affiliation:
Department of Dentistry, University of Adelaide, South Australia
V.B. Burgess
Affiliation:
Department of Dentistry, University of Adelaide, South Australia
*
Department of Dentistry, The University of Adelaide, Adelaide, South Australia 5000

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

Procedures are described for the acquisition and analysis of data in a study of the dental and facial characteristics of South Australian twins. Comparisons of the mesiodistal diameters of maxillary incisors in MZ and DZ twins revealed heterogeneity of total variances and evidence of inequality of mean values for some dimensions between MZ and DZ twins. Previous estimates of heritabilities for tooth size, relying on classical assumptions in twin research, may be exaggerated. A preliminary analysis of facial shape was undertaken using a procedure for shape matching based on a least squares fit of homologous coordinates. There was evidence of mirror-imaging in some MZ twin pairs and differences in facial asymmetry between male and female DZ twins. Future extensions of the study using methods for three-dimensional shape analysis are described.

Keywords

Tooth sizeFacial morphologyTwinsCraniofacial geneticsAsymmetryMirror-imagingShape analysis
Type
Research Article
Information
Acta geneticae medicae et gemellologiae: twin research , Volume 35 , Issue 3-4 , October 1986 , pp. 179 - 192
Copyright
Copyright © The International Society for Twin Studies 1986

References

REFERENCES

1. Boklage, CE (1984): Differences in protocols of craniofacial development related to twinship and zygosity. J Craniofac Genet Devel Biol 4:151–169.Google Scholar
2. Brown, T, Townsend, GC, Richards, LC, Travan, GR (1986): A study of dentofacial morphology in South Australian twins. Aust Dent J (in press).Google Scholar
3. Burke, P (1983): Serial photogrammetric measurements of the soft tissues of the face: a case of a girl with mild facial asymmetry from 3 weeks to 10 years of age. Brit Dent J 155:373–379.Google Scholar
4. Christian, JC, Kang, KW, Norton, JA (1974): Choice of an estimate of genetic variance from twin data. Am J Hum Genet 26:154–161.Google Scholar
5. Christian, JC, Feinleib, M, Norton, JA (1975): Statistical analysis of genetic variance in twins. Am J Hum Genet 27:807.Google Scholar
6. Christian, JC, Norton, JA (1977): A proposed test of the difference between the means of monozygotic and dizygotic twins. Acta Genet Med Gemellol 26:49–53.CrossRefGoogle ScholarPubMed
7. Christian, JC (1979): Testing twin means and estimating genetic variance. Basic methodology for the analysis of quantitative twin data. Acta Genet Med Gemellol 28:35–40.Google Scholar
8. Corruccini, RS, Potter, RHY (1980): Genetic analysis of occlusal variation in twins. Am J Ortho-dont 78:140–154.Google Scholar
9. Corruccini, RS, Potter, RHY (1981): Developmental correlates of crown component asymmetry and occlusal discrepancy. Am J Phys Anthropol 55:21–31.CrossRefGoogle ScholarPubMed
10. Hauspie, RC, Susanne, C, Defrise-Gussenhoven, E (1985): Testing for the presence of genetic variance in factors of face measurements of Belgian twins. Ann Hum Biol 12:429–440.Google Scholar
11. Jain, KK, Jain, BK (1979): Asymmetry in the skull. Acta Anat 104:349–352.Google Scholar
12. Kang, KW, Christian, JC, Norton, JA (1978): Heritability estimates from twin studies. Acta Genet Med Gemellol 27:39–44.CrossRefGoogle ScholarPubMed
13. Lundström, A (1984): Nature versus nurture in dento-facial variation. Europ J Orthodont 6:77–91.Google Scholar
14. Moorrees, CFA, Thomsen, SO, Jensen, E, Yen, PKJ (1957): Mesiodistal crown diameters of the deciduous and permanent teeth in individuals. J Dent Res 36:39–47.Google Scholar
15. Nakata, M (1985): Twin studies in craniofacial genetics: a review. Acta Genet Med Gemellol 34:1–14.Google Scholar
16. Nakata, M, Melnick, M (1982): Twins and the study of normal and abnormal developmental variation. In Melnick, M, Shields, ED, Burzynski, NJ (eds): Clinical Dysmorphology of Oral-Facial Structures. Boston: John Wright, pp 137–157.Google Scholar
17. Potter, RHY, Yu, PL, Christian, JC (1979): Association of twin zygosity with the mean and variance of tooth size. Acta Genet Med Gemellol 28:211–223.Google Scholar
18. Potter, RHY, Corruccini, RS, Green, LJ (1981): Variance of occlusion traits in twins. J Craniofac Genet Devel Biol 1:217–227.Google Scholar
19. Proffit, WR (1986): On the aetiology of malocclusion, Brit J Orthodont 13:1–11.Google Scholar
20. Savara, BS, Miller, SH, Demuth, RJ, Kawamoto, HK (1985): Biostereometrics and computer graphics for patients with craniofacial malformations: diagnosis and treatment planning. Plastic and Recon Surg 75:495–499.Google Scholar
21. Shah, SM, Joshi, MR (1978): An assessment of asymmetry in the normal craniofacial complex. Angle Orthodont 48:141–148.Google Scholar
22. Sharma, K, Corruccini, R (1986): Genetic basis of dental occlusal variations in northwest Indian twins. Europ J Orthodont 8:91–97.Google Scholar
23. Sharma, K, Corruccini, RS, Henderson, AM (1985): Genetic variance in dental dimensions of Punjabi twins. J Dent Res 64:1389–1391.CrossRefGoogle ScholarPubMed
24. Siegel, AF (1982): Geometric data analysis: An iterative graphics program for shape comparisons. In Launer, RL and Siegl, AF (eds): Modern Data Analysis. New York: Academic Press, pp 103–122.Google Scholar
25. Siegel, AF, Benson, RH (1982): A robust comparison of biological shapes. Biometrics 38:341–350.Google Scholar
26. Sneath, PHA (1967): Trend-surface analysis of transformation grids. J Zool (London) 151:65–122.Google Scholar
27. Susanne, C, Defrise-Gussenhoven, E, Van Wanseele, P, Tassin, A. (1983): Genetic and environmental factors in head and face measurements of Belgian twins. Acta Genet Med Gemellol 32:229–238.Google Scholar
28. Travan, GR, Brown, T, Townsend, GC, David, DJ (1986): Craniofacial computer modelling. Proceedings of Ausgraph 86, Fourth Australasian Conference on Computer Graphics, Sydney, pp 195–199.Google Scholar
29. Vig, PS, Hewitt, AB (1975): Asymmetry of the human facial skeleton. Angle Orthodont 45: 125–129.Google ScholarPubMed