Thank you for your query at DoctorSpring.com
Novamin is a bioactive product which when comes in contact with saliva, releases calcium and phosphorus ions which improve the mineralisation of teeth. Yes it is supposed to be helpful, but since there is not a lot of research done over this matter, it is still not sold in most parts of US. So conclusive studies have not been done till now, but theoretically it is supposed to improve teeth health, making it stronger.
Feel free to discuss further,