Haversian System Lab Report

was clear from the data obtained by polarized light microscope (Figs. 4G and H) that the Haversian system is found as an individual canal system, the boundaries, which are marked by an occasional very faint line representing what has been called the cement line by Cook et al. [47]. Osteocytes, found in cavities (lacunae) within the matrix, were noticed. Dark precipitate in the form of a thick black line may indicate the presence of calcium phosphate in calcified bone. It was clear from figures 4I and J that dark color was observed in this sample, which indicates that the sample exposed to temperature at 285-525°C. The Haversian system was recognized but with different sizes. The surface was …show more content…
Abdel-Maksoud and Abdel-Hady [21] said that there is a relationship between the color of bone and exposure to temperature. They also said that thermally altered bone displays surface color and texture changes, which can be a good indicator of the temperature to which the bone was heated, as well as the duration of the heating. Abdel-Maksoud and Abdel-Hady [21], Thompson [48] and Hanson and Cain [49] said that the deposition of carbon in the bone pieces throughout the matrix was noted. This is a very good indicator that the bone was exposed to high temperature. The change of bone color is an indication of the loss of organic and inorganic properties. The authors mentioned above stated that during exposure to heat, especially at high temperatures, the chemical properties of bone alter and structural integrity is impaired or lost. This results from evaporation, organic degradation, and transformation of inorganic matrix. Scanning Electron Microscopy The investigation of the surface morphology (Fig. 5A) of bone using a scanning electron microscope gave more details about the state of the surface [22]. According to Abdel-Maksoud [22] the modern bone has a clearly visible Haversian