Journal of the European Optical Society - Rapid publications, Vol 7 (2012)

Scattering anisotropy measurements in dental tissues and biomaterials

A. Fernandez-Oliveras, M. Rubiño, M. M. Perez

Abstract


Understanding the behaviour of light propagation in biological materials is essential for biomedical engineering and applications, and even more so when dealing with incoming biomaterials. Many methods for determining optical parameters from biological media assume that scattered light is isotropically distributed over all angles. However, an angular dependence of light scattering may exist and affect the optical behaviour of biological media. The present work seeks to experimentally analyze the scattering anisotropy in different dental tissues (enamel and dentine) and their potential substitute biomaterials (hybrid dental-resin, nano-filled composite, and zirconia ceramic) and comparatively study them. Goniometric measurements were made for four wavelengths in the visible range, allowing a spectral characterization of the materials studied. Previously, for each material, measurements were made with two different sample thicknesses at the same wavelength, checking the behaviour of the angular scattering profile. The asymmetry of experimental phase functions was considered in the recovery of the scattering anisotropy factor. The results demonstrate that the thicker sample yielded a less forward-directed scattering profile than did the thinner sample. The biomaterials analysed show angular scattering comparable to those of the tissues that they may replace. Comparisons can be made by virtue of the low uncertainties found.

© The Authors. All rights reserved. [DOI: 10.2971/jeos.2012.12016]

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References


R. R. Anderson, and J. J. Parish, "The optics of human skin," J. Invest. Dermatol. 77, 13-19 (1981).

M. J. C. van Gemert, R. Verdaasdonk, E. G. Stassen, G. A. C. M. Schets, G. H. M. Gijsbers, and J. J. Bonnier, "Optical properties of human blood vessel wall and plaque," Laser. Surg. Med. 5, 235-237 (1985).

S. Ertefai, and A. E. Profio, "Spectral transmittance and contrast in breast diaphanography," Med. Phys. 12, 393-400 (1985).

S. L. Jacques, C. A. Alter, and S. A. Prahl, "Angular Dependence of HeNe Laser Light Scattering by Human Dermis," Lasers Life Sci. 1, 309-334 (1987).

J. M. Steinke, and A. P. Shepherd, "Comparison of Mie theory and the light scattering of red blood cells," Appl. Optics 27, 4027-4033 (1988).

D. K. Sardar, F. S. Salinas, J. J. Perez, and A. T. C. Tsin, "Optical characterization of melanin," J. Biomed. Opt. 6, 404-411 (2001).

D. K. Sardar, R. M. Yow, A. T. C. Tsin, and R. Sardar, "Optical scattering, absorption and polarization of healthy and neovascularized human retinal tissues," J. Biomed. Opt. 10, 0515011-1-8 (2005).

N. Joshi, C. Donner, and H. W. Jensen, "Noninvasive measurement of scattering anisotropyin turbid materials by nonnormal incident illumination," Opt. Lett. 31, 936-938 (2006).

M. Hammer, D. Schweitzer, E. Thamm, and A. Kolb, "Optical properties of ocular fundus tissues determined by optical coherence tomography," Opt. Commun. 186 149-153 (2000).

A. Kienle, M. S. Patterson, L. Ott, and R. Steiner, "Determination of the scattering coefficient and the anisotropy factor from laser Doppler spectra of liquids including blood," Appl. Optics 35, 3404-3412 (1996).

I. Turcu, C. V. L. Pop, and S. Neamtu, "High-resolution angleresolved measurements of light scattered at small angles by red blood cells in suspension," Appl. Optics 45, 1964-1971 (2006).

S. B. Mitra, D. Wu, and B. N. Holmes, "An application of nanotechnology in advanced dental materials," J. Am. Dent. Assoc. 134, 1382-1390 (2003).

J. Chevalier, and L. Gremillard, "Ceramics for medical applications: A picture for the next 20 years," J. Eur. Ceram. Soc. 29, 1245-1255 (2009).

International Organization for Standardization, Guide to the Expression of Uncertainty in Measurement (ISO, Geneva, 1993).

I. A. Mjor, "The morphology of dentin and dentinogenensis" in Dentin and Dentino Genesis, A. Linde, ed., 2-18 (CRC Press, Boca Raton, 1984).

M. E. J. Curzon, and J. D. B. Featherstone, "Chemical composition of enamel" in Handbook of Experimental Aspects of Oral Biochemistry, E. P. Lazzan, ed., 123-135 (CRC Press, Boca Raton, 1983).

I. Denrya, and J. R. Kellyb "State of the art of zirconia for dental applications," Dent. Mater. 24, 299 (2008).

J. D. Chicea, "Probing particle aggregation in aqueous suspensions by light scattering anisotropy measurements," Optoelectron. Adv. Mat. 12, 152 (2010).

R. Ghinea, L. Ugarte-Alvan, A. M. Ionescu, J. C. Cardona, M. M. Prez, and A. Yebra, "Influence of the size and distribution of filler particles on the colour of resin composites," in Proceeding of the Fourth European Conference on Color in Graphics, Imaging, and Vision, 296-299 (Society for Imaging Science and Technology, Terrasa, 2008).