Table 1.

Relative elemental composition (summarized areas) and Ca/P- and Ca/N-Ratios of all tooth types for enamel and dentin [At%], median and 25–75% percentiles of six specimens per group (data also shown in Figure 5 and Figure 6; p-values in Table 2 and Table 4). Elements Fe and S were measured but are not shown because the median and 25–75% percentiles were 0.00 At% in field scans.

			Ca	P	O	C	N	F	Na	Mg	Cl	Ca/P-Ratio	Ca/N-Ratio
Human molar	Enamel	Median	21.05	12.90	61.80	2.50	0.00	0.00	1.40	0.30	0.10	1.63	–
		25–75	20.83–21.25	12.70–13.00	61.43–62.05	2.33–2.78	0.00–0.00	0.00–0.00	1.30–1.40	0.30–0.30	0.10–0.20	1.62–1.65	–
	Dentin	Median	13.40	9.05	53.65	17.90	4.45	0.00	1.10	0.50	0.00	1.49	3.04
		25–75	12.80–14.13	8.58–9.28	52.73–55.25	16.63–20.10	3.30–5.00	0.00–0.00	1.03–1.10	0.40–0.50	0.00–0.00	1.45–1.53	2.53–4.28
Bovine incisor	Enamel	Median	21.00	12.85	62.20	2.45	0.00	0.00	1.20	0.30	0.10	1.63	–
		25–75	20.73–21.28	12.70–12.98	61.73–62.58	2.23–2.50	0.00–0.00	0.00–0.00	1.10–1.28	0.20–0.30	0.10–0.20	1.61–1.64	–
	Dentin	Median	14.00	9.70	57.15	14.70	2.65	0.00	1.05	0.70	0.00	1.44	5.16
		25–75	13.33–14.55	9.38–10.13	56.30–58.60	13.15–15.75	2.33–3.23	0.00–0.00	1.00–1.10	0.63–0.70	0.00–0.00	1.41–1.46	4.15–6.34
Murine incisor	Enamel	Median	18.35	12.00	58.25	10.25	0.00	0.00	1.05	0.25	0.30	1.53	–
		25–75	18.00–18.75	11.83–12.28	56.83–59.43	8.80–10.88	0.00–0.00	0.00–0.00	0.90–1.18	0.20–0.30	0.20–0.30	1.51–1.54	–
	Dentin	Median	15.75	11.35	60.80	9.70	0.35	0.00	1.05	0.95	0.00	1.39	34.60
		25–75	15.43–16.08	11.13–11.48	59.53–62.38	8.33–10.45	0.00–0.50	0.00–0.08	0.83–1.33	0.80–1.15	0.00–0.00	1.36–1.42	25.41–49.00
Murine molar	Enamel	Median	18.30	11.70	57.65	10.85	0.00	0.00	1.20	0.20	0.10	1.57	–
		25–75	17.85–18.88	11.50–12.00	57.18–58.85	9.03–11.60	0.00–0.00	0.00–0.00	1.10–1.20	0.20–0.20	0.10–0.20	1.53–1.57	–
	Dentin	Median	16.05	10.80	58.55	12.20	0.45	0.00	1.10	0.35	0.05	1.49	27.33
		25–75	14.95–16.73	10.33–11.00	56.45–60.90	9.63–15.68	0.08–1.03	0.00–0.00	1.00–1.20	0.30–0.40	0.00–0.20	1.45–1.50	13.17–46.38