Título del libro: Hydroxyapatite And Related Materials
Título del capítulo: Structural analysis of the human tooth enamel by transmission electron microscopy
JOSE REYES GASGA;
Autores externos:
Idioma:
Inglés
Año de publicación:
2017
Palabras clave:
Electrons; Enamels; High resolution transmission electron microscopy; Hydroxyapatite; Transmission electron microscopy; Dark-lines; Defocus; Enamel structure; Human tooth enamels; Image simulations; Lattice fringes; Preferential dissolution; Zone axis; Tooth enamel
Resumen:
Human tooth enamel is formed by grains which, when observed with the electron transmission electron microscope, sometimes exhibit a line 1 to 1.5nm thick along their centers. This line has been called ?dark line.? 1-3 A distinctive feature of the line is that it appears dark in defocus, disappears when the image goes through focus, and is white bordered by two slightly darker fringes in overfocus. This line is observed in conjunction with the (100) lattice fringes of the hydroxyapatite when the grains are observed along the [010] zone axis and parallel to one of the (110) planes when the grains are observed along the [001] zone axis. 4 The occurrence of this line is of particular interest because it seems to go under preferential dissolution during early stages of caries. 5 However many questions remains unanswered as to what the central defect plane really is and what its role in the enamel structure is. In this work we present the results obtained on the human tooth enamel grains and on the dark line when techniques of transmission electron microscopy, x-ray diffraction, digital processing and image simulations are used. © 1994 by CRC Press, Inc.
Entidades citadas de la UNAM:
ISBN:
9781351439497
Editorial:
CRC Press Nombre de la publicación:
Structural analysis of the human tooth enamel by transmission electron microscopy
Página inicial:
295
Página final:
304
