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Related Concept Videos

Bone Formation by Endochondral Ossification01:24

Bone Formation by Endochondral Ossification

Bone formation, or ossification, begins around the sixth to seventh week of embryonic development. Most bones develop from a cartilaginous template through the process of endochondral ossification. Cartilage formation begins when clusters of mesenchymal cells differentiate into chondrocytes. These chondrocytes proliferate rapidly and secrete an extracellular matrix that becomes encased in a membrane called the perichondrium. The resulting cartilage model provides a template that resembles the...
Bone Formation by Intramembranous Ossification01:29

Bone Formation by Intramembranous Ossification

Intramembranous ossification is one of the two processes involved in the development of bones within an embryo. The flat bones of the face, most of the cranial bones, and the clavicles are formed via this process. During intramembranous ossification, the bones develop directly from sheets of undifferentiated mesenchymal connective tissue.
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Bone Remodeling01:40

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Bone remodeling is a continuous and balanced process of bone resorption by osteoclasts and bone formation by osteoblasts. In adults, it helps maintain bone mass and calcium homeostasis. While mechanical stress can stimulate turnover as part of the normal maintenance and reparative process, several hormones also regulate bone remodeling.
Bone Structure01:55

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Gross Anatomy of Bone01:17

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The two main features of a long bone are the diaphysis and the epiphysis.
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Culturing and Measuring Fetal and Newborn Murine Long Bones
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Published on: April 26, 2019

Mapping human long bone compartmentalisation during ontogeny: a new methodological approach.

Oscar Cambra-Moo1, Carmen Nacarino Meneses, Miguel Ángel Rodríguez Barbero

  • 1Laboratorio de Poblaciones del Pasado (LAPP). Departamento de Biología, Facultad de Ciencias, Universidad Autónoma de Madrid (UAM), 28049 Madrid, Spain. oscar.cambra@uam.es

Journal of Structural Biology
|May 3, 2012
PubMed
Summary
This summary is machine-generated.

Human bone development involves complex tissue changes. A new Geographical Information System (GIS) method quantifies bone compartmentalization, revealing differential mineral content and remodeling during growth.

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Area of Science:

  • Human Osteology
  • Bone Histology
  • Biomineralization

Background:

  • Human bone undergoes significant changes in shape, size, and tissue type during development (ontogeny).
  • Current methods for studying cortical bone compartmentalization oversimplify its complex tissue variations.
  • Understanding tissue distribution within cortical bone is crucial for developmental studies.

Purpose of the Study:

  • To introduce a novel methodological approach for analyzing bone tissue compartmentalization.
  • To quantitatively assess the spatial distribution of mineralized and non-mineralized tissues in long bone sections.
  • To investigate age-related changes in tibial cortical bone structure and composition.

Main Methods:

  • Integration of histological description with mineral content analysis (Raman and FT-IR spectroscopy).
  • Application of Geographical Information System (GIS) software for semi-automatic, quantitative spatial analysis of bone images.
  • Study of tibiae from individuals across different developmental stages (infant, juvenile, adult).

Main Results:

  • The developed GIS-based methodology enables quantitative, spatial comparison of bone tissue compartments.
  • Tibial cortical bone exhibits fibrolamellar bone structure with evidence of remodeling and lines of arrested growth from early ontogeny.
  • Differential changes in mineral content were observed, with the anterior tibia showing higher porosity and lower crystallinity, indicating continuous remodeling.

Conclusions:

  • The new GIS methodology provides a more comprehensive approach to studying bone tissue complexity and compartmentalization.
  • Bone remodeling and mineral content variations are significant during human ontogeny, particularly in the anterior tibia.
  • While porosity changes, the mineralized bone portion and marrow cavity size maintain proportional relationships throughout development.