title: Magnification--a new look at a long-known optical property of dentin.
abstract: Light propagation in human dentin exhibits a strong directional dependence featuring the long-known optical magnification property. We hypothesized that this anisotropic effect is caused by multiple scattering at the dentin tubules, and not by fiberoptic effects, as had been previously assumed. We performed measurements of the transmitted intensity from dentin disks and compared them with Monte Carlo simulations of light propagation in dentin, considering the scattering by the tissue's microstructure. We found that the optical anisotropy of dentin can be fully explained with this model. We concluded that the magnification property of dentin is due to multiple scattering by the dental microstructure.
authors.affiliation: Institut für Lasertechnologien in der Medizin und Messtechnik, Helmholtzstrasse 12, D-89081 Ulm, Germany. alwin.kienle@ilm.uni-ulm.de
authors.forename: A
authors.initials: A
authors.lastname: Kienle
authors.forename: R
authors.initials: R
authors.lastname: Michels
authors.forename: R
authors.initials: R
authors.lastname: Hibst
mesh_terms: D016880:Anisotropy; D003804:Dentin / Q000737:chemistry / Q000648:ultrastructure*; D006801:Humans; D008027:Light; D008853:Microscopy / Q000379:methods; D008954:Models, Biological; D008963:Molar; D009010:Monte Carlo Method; D055095:Optics and Photonics; D014172:Transillumination