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Thermal analysis of rat bone tissue

A R Calafiori1, L Imbrogno, G Martino

  • 1Department of Chemistry, University of Calabria, Rende, CS.

Bollettino Della Societa Italiana Di Biologia Sperimentale
|November 1, 1993
PubMed
Summary

This study analyzed rat limb bones using thermal analysis, revealing distinct thermal events and quantifying water and organic content. Results show higher organic content in epiphyseal trabecular bone compared to diaphyseal compact bone.

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Area of Science:

  • Biomaterials Science
  • Materials Science
  • Biochemistry

Background:

  • Bone tissue is a complex composite material critical for skeletal function.
  • Understanding the thermal decomposition of bone matrix is essential for biomaterial development and forensic science.
  • Previous studies have investigated bone thermal properties, but detailed analysis across different bone regions and extraction methods is ongoing.

Purpose of the Study:

  • To characterize the thermal decomposition behavior of rat limb bones using thermogravimetric (TG), derivative thermogravimetric (DTG), and differential scanning calorimetry (DSC) techniques.
  • To quantify the water and organic content in different bone samples (femur, tibia, humerus) after various extraction treatments.
  • To compare the organic content between diaphyseal (compact) and epiphyseal (trabecular) bone tissues.

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Main Methods:

  • Rat limb bones (femurs, tibiae, humeri) were analyzed using TG, DTG, and DSC.
  • Samples were analyzed in crude form and after extraction with acetone and/or sodium dodecylsulphate.
  • Thermal events, weight loss percentages, and organic content were determined.

Main Results:

  • DSC curves exhibited an endothermic reaction at 85°C and exothermic peaks at 337°C and between 350°C-650°C.
  • Total weight loss averaged 34.28% from 25°C-800°C, with 7.33% attributed to water loss (25°C-200°C) and 26.21% to organic loss (200°C-800°C).
  • Epiphyseal trabecular bone showed significantly higher organic content (30.62%) compared to diaphyseal compact bone (24.54%, p < .005).

Conclusions:

  • Thermal analysis provides valuable insights into the composition and thermal decomposition of bone tissue.
  • The extraction methods and bone region significantly influence the observed thermal profiles and quantified organic content.
  • These findings contribute to a better understanding of bone material properties for potential applications in biomaterials and forensic investigations.