Habits That Can Destroy Your Teeth | Emergency Dental Service There are some habits that can seriously harm oral health, including ice chewing, which can cause tooth fractures, while nail biting can harm the enamel and surrounding tissues. Additionally, sugary drink consumption promotes tooth disease and cavities. By avoiding these practices, individuals can safeguard their dental health and keep their smiles looking great. Schedule an appointment at 1-888-350-1340.