Sometimes, tooth problems are genetic. As with so many aspects of the body, tooth strength is not the same for everyone. There’s a wide range of strengths in dental enamel and dentin. At the extreme weak end, we have genetic conditions that weaken teeth. Dentinogenesis imperfecta is when the dentin, the middle layer of your tooth, doesn’t form correctly. Amelogenesis imperfecta is a genetic condition where the outer layer of the tooth, the enamel, doesn’t form correctly. Both conditions can make your teeth more likely to break.
Other people have weak dentin or enamel without meeting the criteria for an imperfecta diagnosis.