Ancient and Modern Specimens of Human Teeth: a Fourier Transform Raman Spectroscopic Study

Kirchner, Marietta; Edwards, Howell G. M.; Lucy, David; Pollard, A. M.

doi:10.1002/(sici)1097-4555(199702)28:2/3<171::aid-jrs63>3.0.co;2-v

Cited by 91 publications

(72 citation statements)

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“…Peaks due to inorganic mineral component, namely crystalline hydroxyapatite, Ca 10 (PO 4 ) 6 (OH) 2 , are clearly exhibited at wavenumber shifts of 432, 585, 960, and 1044 cm 21 (vibration modes of phosphate). 11 At higher wavenumber shifts, peaks due to the organic component of the dentine are found, at wavenumbers of 1250, 1459 and 1663 cm 21 , related to vibration of NH (amide III), CH 3 -CH 2 and CyO (amide I) groups, respectively. 11 A further strong Raman signal is detected in the wavenumber region of 2800 -3000 cm 21 , generally assigned to stretching vibrations of C -H functional groups.…”

Section: Resultsmentioning

confidence: 99%

Er:YAG laser treatments on dentine surface: micro-Raman spectroscopy and SEM analysis

Camerlingo

Lepore²,

Gaeta

et al. 2004

Journal of Dentistry

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Section: Resultsmentioning

confidence: 99%

Er:YAG laser treatments on dentine surface: micro-Raman spectroscopy and SEM analysis

Camerlingo

Lepore²,

Gaeta

et al. 2004

Journal of Dentistry

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“…7) are associated with protein/collagen components of teeth and broadening of the phosphate features. [25,26] This would suggest that the dentine, pulp and snake fang samples contain higher levels of protein and lower levels of b-type substituted carbonate in the hydroxyapatite matrix than the enamel. The broadening of the phosphate feature is likely because of higher levels of organic compounds disrupting the order in the phosphate crystals form.…”

Section: Pcamentioning

confidence: 96%

“…These show some differences with respect to the known spectra for human enamel. [25] However the variation between the differing species of snake is very small and may only be identified using PCA (Table 1).…”

Section: Raman Spectroscopymentioning

confidence: 99%

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Chemical and mechanical properties of snake fangs

Vuuren

Dickenson

Gordon

et al. 2016

J Raman Spectroscopy

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The composition of dental tissues and their interaction determines its mechanical properties. The mechanical properties and chemical composition of the teeth of extant reptiles are still poorly studied areas. As a preliminary study the fangs of four species of snakes and a human tooth were investigated through nanoindentation and Raman spectroscopy. The average elastic modulus values for the main body of the fangs ranged from 15.3 GPa to 24.6 GPa, and 19.1 GPa for the human dentine. Raman spectroscopy and principal component analysis (PCA) showed that snake fangs are similar in composition to human dentine, both of which comprised of hydroxyapatite and an organic matrix. The elastic modulus and hardness data were correlated to the Raman spectra using partial least squares regression (PLS). The spectral features which correlated with the elastic modulus would suggest that elastic modulus is dependent on the relative protein to mineral amounts in the tooth. The form of the phosphate and the relative levels of phosphate to organic components also appear to be governing factors for elastic modulus. The PLS of Raman spectra against the hardness gave very similar results. The small differences between snake fangs and human dentine appeared to be because of carbonate content, with higher levels of carbonate in the human tooth than the snake fangs.Snake fangs should be able to withstand large lateral forces. Human dentine aids in dissipating imposed loads. This similarity in the chemical composition of the snake fangs and human dentine supported the findings of the similarities in mechanical properties, which may be attributed to the similar functional demands of these biocomposites.

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“…A voluminous literature exists on the Raman analysis of human and animal bioartefacts including teeth [4,78,99], mummified skin [65,72,73,85,86,144], hair [145], 'organs' [65], bone [64,72], hooves and nails [50,72,73], and ivory [13,61,[66][67][68]117]. Because of the intrinsic or acquired fluorescence of these materials, all these projects have utilised an NIR laser and an FTRaman spectrometer.…”

Section: Biomaterials (Skin Hair Teeth Bones and Ivory)mentioning

confidence: 99%