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La organización jerárquica del hueso comienza en la nanoescala
Natalie Reznikov1, Matthew Bilton2,3, Leonardo Lari2,4
1Department of Materials, Department of Bioengineering and Institute for Biomedical Engineering, Faculty of Engineering, Imperial College London, London, UK.
Science (New York, N.Y.)
|May 5, 2018
Resumen
El mineral óseo se ensambla jerárquicamente a partir de unidades de nanoescala en una mineralización continua y transversal. Esta organización mejora el hueso
Área de la Ciencia:
- La biomineralización
- Biología ósea
- Ciencias de los materiales
Sus antecedentes:
- Las propiedades mecánicas del hueso dependen del montaje jerárquico de mineral y colágeno.
- La organización precisa a nanoescala del mineral óseo y su relación con el colágeno siguen sin estar claras.
Objetivo del estudio:
- Para aclarar la organización jerárquica de los minerales óseos a nanoescala.
- Para entender la relación entre las estructuras de mineral y colágeno en el hueso.
Principales métodos:
- Tomografía electrónica en tres dimensiones.
- Microscopía electrónica bidimensional de alta resolución.
Principales resultados:
- El mineral óseo se ensambla jerárquicamente, comenzando con unidades en forma de aguja que se fusionan en plaquetas.
- Las plaquetas se organizan en pilas, formando agregados que abarcan las fibrillas de colágeno.
- Se observó una mineralización fibrilar continua que excede las dimensiones de las fibrillas.
Conclusiones:
- Se propone un modelo estructural para la naturaleza jerárquica y continua del mineral óseo.
- Esta organización mineral es crucial para la integridad estructural y la resistencia mecánica del hueso.
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