Thank you so much for your response.I'm 33 and I have used Crest Whitestrips before but not the Age Defying ones.I have very nice healthy teeth and never had cracks before.I know cause I look at my teeth every night in a special reflective light and I know for a fact that this particular product has caused it.I know because I looked at my teeth before I used it (once that time) and then after I took the strips off.The bleaching didn't bring the "lines or rather cracks "out because my teeth haven't been bleached enough.(As I mentioned previously I only used it this one time).I say these are lines but they are actually cracks in my teeth (hairline like).They are not white lines but cracks that run from the gums to the edge of the tooth.I don't know why you would say cracks in teeth are normal especially stress related.I'm not sure what you mean by that.Are you talking about teeth grinding?I don't do that.I know for a fact.And I'm only 33 and live a very healthy lifestyle.I have read on the ADA.COM website that although very rare- irreverisble tooth damage has been reported form using the strips.
As you said also I'm avoiding certain foods and Sugar and also got an enamel strenghtening toothpaste.But in saying all that I still need the cracks fixed and want my teeth to be smooth like before without cracks.I do not want any cavities.Is there any procedure that will fix that? If yes what is it and what are the costs?Thank you for your response.