Dmvcc, I cannot tell you anything about what your striations might or might not be, but as someone whose dentist blew off the hygienist when she pointed out something in my mouth, I hope you thank yours and your dentist for their vigilence. Given the time frame involved, if you have a problem, you will most probably be in much better position than the people whose dentists were not so concerned and aware. Let us know the outcome. And this might be just the wakeup call you need to discontinue the tobacco that will get you later, one way or another, even if you come out okay this time. It IS good that you are trying!