Science Advances

Supplementary Materials

This PDF file includes:

  • fig. S1. Typical APT mass spectrum of human dental enamel containing organic materials (sample 1, Fig. 2).
  • fig. S2. Mass spectra from different regions of human tooth enamel.
  • fig. S3. Mass spectrum from N-rich region (organic).
  • fig. S4. APT 3D reconstructed volumes of sample 3.
  • fig. S5. APT 3D reconstructed volumes of samples 4 and 5.
  • fig. S6. APT 3D reconstructed volumes of sample 6.
  • table S1. Theoretical isotope proportion for Mg, C, and C2 at 12, 12.5, and 13 daltons.
  • table S2. Measured isotopic proportions at 12, 12.5, and 13 daltons in C-rich regions of enamel.
  • table S3. Measured isotopic proportions at 12, 12.5, and 13 daltons in precipitate B.
  • table S4. Measured isotopic proportions at 12, 12.5, and 13 daltons in intergranular ACP.
  • table S5. Measured isotopic proportions at 12, 12.5, and 13 daltons in Mg-rich precipitate of sample 4.
  • table S6. Typical composition of ACP, HAP, and Mg-rich precipitates in human dental enamel measured by APT.

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Other Supplementary Material for this manuscript includes the following:

  • movie S1 (.mp4 format). Animation showing the 3D distribution of Mg and Na atoms in human dental enamel; APT sample 3.

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