Abstract
The study of dental morphology is essential in terms of phylogeny. Advances in three-dimensional (3D) measurement devices have enabled us to make 3D images of teeth without destruction of samples. However, raw fundamental data on tooth shape requires complex equipment and techniques. An online database of 3D teeth models is therefore indispensable. We aimed to explore the basic methodology for constructing 3D teeth models, with application for data sharing. Geometric information on the human permanent upper left incisor was obtained using micro-computed tomography (micro-CT). Enamel, dentine, and pulp were segmented by thresholding of different gray-scale intensities. Segmented data were separately exported in STereo-Lithography Interface Format (STL). STL data were converted to Wavefront OBJ (OBJect), as many 3D computer graphics programs support the Wavefront OBJ format. Data were also applied to Quick Time Virtual Reality (QTVR) format, which allows the image to be viewed from any direction. In addition to Wavefront OBJ and QTVR data, the original CT series were provided as 16-bit Tag Image File Format (TIFF) images on the website. In conclusion, 3D teeth models were constructed in general-purpose data formats, using micro-CT and commercially available programs. Teeth models that can be used widely would benefit all those who study dental morphology.
References
Baba H, Aziz F, Kaifu Y, Suwa G, Kono R, Jacob T et al (2003) Homo erectus calvarium from the pleistocene of Java. Science 299:1384–1388
Fujita T (1951) On the standard of the measurement of teeth (in Japanese). Jinruigaku zasshi 61:27–32
Guerrero ME, Jacobs R, Loubele M, Schutyser F, Suetens P, Steenberghe D (2006) State-of-the-art on cone beam CT imaging for preoperative planning of implant placement. Clin Oral Investig 10:1–7
Hannig C, Krieger E, Dullin C, Merten H-A, Attin T, Grabbe E et al (2006) Volumetry of human molars with flat panel-based volume CT in vitro. Clin Oral Investig 10:253–257
Hu B, Nadiri A, Bopp-Küchler S, Prrin-Schmitt F, Lesot H (2005) Dental epithelial histomorphogenesis in vitro. J Dent Res 84(6):521–525
Ito T (1972) Morphological study on the side view of tooth crown (Maxillary Second Bicuspid). Aichi-gakuin daigaku zasshi (in Japanese) 9(4):1–29
Kassai Y, Munne P, Hotta Y, Penttilä E, Kavanagh K, Ohbayashi N et al (2005) Regulation of mammalian tooth cusp patterning by ectodin. Science 309:2067–2070
Kubota K, Natori M, Sasaki K (1994) Three-dimensional measurement study of the maximum protuberance and cervical line of the upper molars. J Nihon Univ Sch Dent 36(1):58–67
Özmeric N, Kostioutchenko I, Hägler G, Frentzen M, Jervoe-Storm P-M (2008) Cone-beam computed tomography in assessment of periodontal ligament space: in vitro study on artificial tooth model. Clin Oral Investig (in press) PMID 18247066
Peters OA, Laib A, Rüegsegger P, Barbakow F (2000) Three-dimensional analysis of root canal geometry by high-resolution computed tomography. J Dent Res 79(6):1405–1409
Shimizu Y, Usui K, Araki K, Kurosaki N, Takanobu H, Takanishi A (2005) Study of finite element modeling from CT image. Dent Mater J 24(3):447–455
Stavropoulos A, Wenzel A (2007) Accuracy of cone beam dental CT, intraoral digital and conventional film radiography for the detection of periapical lesions. An ex vivo study in pig jaws. Clin Oral Investig 11:101–106
Suwa G, Kono R (2005) A micro-CT based study of linear enamel thickness in the mesial cusp section of human molars: reevaluation of methodology and assessment of within-tooth, serial, and individual variation. Anthropol Sci 113:273–289
Verdonschot N, Fennis WMM, Kuijs RH, Stolk J, Kreulen CM, Creugers NHJ (2001) Generation of 3-D finite element models of restored human teeth using micro-CT techniques. Int J Prosthodont 14(4):310–315
Acknowledgments
We would like to express our sincere gratitude to Mr. Masahito Natsuhara of Shimadzu Corporation for assistance with the micro-computed tomography system. This work was supported by a grant-in-aid for the “High-Tech Research Center” Project for Private Universities, with a matching fund subsidy from the Ministry of Education, Culture, Sports, Science and Technology of Japan, 2003-2007 (no. 2003).
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Kato, A., Ohno, N. Construction of three-dimensional tooth model by micro-computed tomography and application for data sharing. Clin Oral Invest 13, 43–46 (2009). https://doi.org/10.1007/s00784-008-0198-4
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DOI: https://doi.org/10.1007/s00784-008-0198-4