From my reading, he had habit of not brushing his teeth properly. As result, he had gum issue, cavities, and bad breath. (It doesn’t surprise me, I mean he was a basically a bum for a period of time in the 1920’s and kind of kept some of those traits even after he came to power.)
The x-ray plates are currently housed at the U.S. National Library of Medicine. Here’s more information on the images. Page 99 of the PDF document.