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. Author manuscript; available in PMC: 2016 May 1.
Published in final edited form as: Arch Oral Biol. 2015 Feb 27;60(5):690–697. doi: 10.1016/j.archoralbio.2015.02.020

Fig. 5.

Fig. 5

Mean ratios of 1070/960 cm−1 (carbonate/phosphate) before (0 Gy) and after (70 Gy) simulated radiotherapy at eight sites associated with the DEJ (4 buccal and 4 lingual sites; 5 spectra/site/tooth; n = 7 teeth): 500 μm into enamel (E-500); 30 μm into enamel (E-30); 30 μm into dentin (D-30); 500 μm into dentin (D-500). Error bars represent SD. *The carbonate/phosphate ratio is significantly higher (P≤0.05) at E-30 and significantly lower at D-500 following simulated radiotherapy.