I found some cracks on the edge of my back teeth and searched on
internet. I think they might be so-called "craze lines".  Because I
don't have pain on these teeth. But they are really long. They run
over the whole chewing surface.
How can I tell the difference between crack and craze lines? Does loss
of one tooth produce too much pressure hence crack lines on other
teeth?
I guess the cracks could not be there in one day, if one grind his
teeth or chewing hard things, how long can that result in tooth crack?