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. Author manuscript; available in PMC: 2013 Dec 1.
Published in final edited form as: Arch Oral Biol. 2012 May 19;57(12):1585–1594. doi: 10.1016/j.archoralbio.2012.04.014

Table 1.

Average peak ratios of 2931 cm−1/430 cm−1 before and after treatments

Enamel Location* Ratio NEt (Mean±SD) Et (Mean± SD) Et/B (Mean±SD)
400 μm** 2931/430 0.10±0.17aA 0.23±0.17aB 0.23±0.08aB
Inner** 2931/430 0.34±0.23bB 0.97±0.83bA 0.37±0.09bB

Footnotes:

Enamel locations: 400 μm from DEJ; Inner= 50 μm from DEJ

Treatments: NEt =non-etched; Et=etched; Et/B= etched, then bleached

Average peak ratios were obtained from measurements on four separate teeth

*

The protein/mineral ratios are significantly higher in inner enamel as compared to enamel 400 microns from the DEJ across treatment groups (subsets indicated by small case letters).

**

Within each enamel location, there are also significant differences in protein/mineral ratios among treatments (subsets indicated by capital letters).