In my bottom teeth my incisor got no enamel on it and looks thin. what will happen if i lose a layer of dentin. can't have crown i've got swollen gum?

2 separate problems: 1. Gum disease. This is a serious problem, which should be checked and treated by a dentist. 2. When enamel damaged, the tooth is more susceptible to cavities.There are variety of options to fix lost enamel to protect dentine: for small erosion bonding is used. If the enamel loss is significant, full crown maybe a solution. See your dentist ASAP.

Damaged tooth: You are in as much danger of loosing the tooth from gum/bone disease as you are from excessive wear. You need a Dentist to evaluate the cause of both your inflammation and your abrasion, and to formulate a comprehensive treatment plan. Input from various dental Specialists may be required. The longer you wait, the greater the damage, the more extensive/expensive the repairs. See Dentist now.