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  Indian J Med Microbiol
 

Figure 3: (a) Representative X-ray images of a sample showing the subtraction of image pixels after 2nd demineralization attack from those after ACT®application; Left image: After 2nd demineralization attack. Middle image: Subtracted image. Right image: After ACT® application. (b) The Green colour represents the subtracted spots.

Figure 3: (a) Representative X-ray images of a sample showing the subtraction of image pixels after 2<sup>nd</sup> demineralization attack from those after ACT®application; Left image: After 2<sup>nd</sup> demineralization attack. Middle image: Subtracted image. Right image: After ACT® application. (b) The Green colour represents the subtracted spots.