In vitro examination of human teeth using ultrasound and X-ray diffraction

• Autorzy: Gawda, H. , Sękowski, L. , Trębacz, H.
• Języki publikacji: EN

Abstrakty

EN

The aim of this paper was to find whether an ultrasound velocity along a whole tooth reflects variety of its morphology and properties and to compare thc results of ultrasonic measuremcnts with X-ray diffraction data from a large area of tooth. 100 kHz pulses were transmitted in longitudinal direction of ectracted teeth. A significant variation of velocity in teeth from diffcrent donors was statwd (from 3200 m/s to 4200 m/s). The velocity was influenced both by the age of donors and the type of a tooth. For a given individual, the grcatest difference was revealed between incisors and canine teeth. Considering X-ray diffraction results, a difference in size of crystallites between teeth was found. In an enamel, the size of crystallites ranged from 20 nm to 50 nm, and in dentin - from 5.5 nm to 39 nm. The size of crystailites in dentin was positively correlated with the ultrasound velocity.

Słowa kluczowe

PL

ząb; dyfrakcja rentgenowska

EN

teeth; X-ray diffraction; ultrasonic measurements

• Czasopismo: Acta of Bioengineering and Biomechanics
• Rocznik: 2004
• Tom: Vol. 6, nr 1
• Strony: 41-49
• Opis fizyczny: Bibliogr. 12 poz., rys., tab., wykr.

Twórcy

autor

Gawda, H.

• Department of Biophysics, Medical University of Lublin, ul. Jaczewskicgo 8, 20-090 Lublin, Poland,

autor

Sękowski, L.

• Department of Biophysics, Medical University of Lublin, ul. Jaczewskicgo 8, 20-090 Lublin, Poland

autor

Trębacz, H.

• Department of Biophysics, Medical University of Lublin, ul. Jaczewskicgo 8, 20-090 Lublin, Poland

Bibliografia

• [1] JONES F.H., Teeth and bones: applications of surface science to dental materials and related biomaterials, Surface Science Reports, 2001, Vol. 42, pp. 75–205.
• [2] HANDSCHIN R.G., STERN W.B., X-ray diffraction studies on the lattice perfection of human bone apatite, Bone, 1995, Vol. 16(4, Suppl.), pp. 355S–363S.
• [3] KINNEY J.H., POPLE J.A., MARSHALL G.W., Collagen orientation and crystallite size in human dentin: a small angle X-ray scattering study, Calcif. Tissue Int., 2001, Vol. 69, pp. 31–37.
• [4] LEES S., ROLLINS F.R., Anisotropy in hard dental tissues, J. Biomechanics, 1972, Vol. 5, pp. 557–566.
• [5] SASAKI N., MATSUSHIMA N., IKAWA T., YAMAMURA H., FUKUDA A., Orientation of bone mineral and its role in the anisotropic mechananical properties of bone – transverse anisotropy, J. Biomechanics, 1989, Vol. 22(2), pp. 157–164.
• [6] AL-NAVAS B., GROTZ K.A., ROSE E., DUSCHNER H., KANN P., WAGNER W., Using ultrasound transmission velocity to analyse the mechanical properties of teeth after in vitro, in situ, and in vivo irradiation, Clin. Oral. Invest., 2000, Vol. 4, pp. 168–172.
• [7] FINKE M., HUGHES J.A., PARKER D.D., JANDT K.D., Mechanical properties of in situ demineralised human enamel measured by AFM nanoindentation, Surface Science, 2001, Vol. 491, pp. 456–467.
• [8] GARDNER T.N., ELIOTT J.C., SKLAR Z., BRIGGS G.A., Acoustic microscope study of the elastic properties of flourapatite and hydroxyapatite, tooth enamel and bone, J. Biomechanics, 1992, Vol. 11, pp. 1265–1277.
• [9] LANDIS W.J., The strength of a calcified tissue depends in part on the molecular structure and organization of its constituent mineral crystals in their organic matrix, Bone, 1995, Vol. 16, pp. 533– 544.
• [10] MAEV R.G., DENISOWA L.A., MAEVA E.Y., DENISSOV A.A., New data on histology and physicomechanical properties of human tooth tissue obtained with acoustic microscopy, Ultrasound in Med. & Biol., 2002, Vol. 28(1), pp. 131–136.
• [11] PAVOLO F., HERMIDA E.B., Measurement of the elastic modulus of dental pieces, Journal of Alloys and Compounds, 2000, Vol. 310, pp. 392–395.
• [12] SPEARS I.R., A three-dimensional finite element model of prismatic enamel: a re-appraisal of the data on the Young’s modulus of enamel, J. Dent. Res., 1997, Vol. 76(10), pp. 1690–1697.