Yes, some chips can become larger, particularly when the damaged area is exposed to repeated biting pressure. A small enamel chip may remain stable, but more serious damage can leave the tooth more vulnerable. A dental examination will help determine whether the tooth needs repair or monitoring. 

 Yes. If you find the fragment, place it in a clean container with milk or saliva and bring it to your appointment. In certain cases, a dentist may be able to reattach it. Even when that's not possible, other repair methods may be available. 

 Sometimes. A small chip on a back tooth may be treated with a filling, depending on its location and the amount of healthy tooth remaining. If a large section has broken away or the tooth is weakened, a crown or another restoration may offer better protection. 

 You can usually continue brushing gently with a soft-bristled toothbrush. Avoid pressing against sharp or sensitive areas, and don't try to file the damaged edge yourself. If brushing causes pain, contact your dentist for advice and arrange an examination. 

 Yes, although the repair may need to be planned around your orthodontic treatment. The dentist will consider the position of the chip and whether bonding or another restoration could affect your appliance. If you wear clear aligners, bring them to your appointment so their fit can be checked.