Exposure to sweet and acidic food/drink can break down the enamel surface and spread into the tooth and cause cavities. Poor tooth brushing technique or lack of brushing can put teeth at higher risk of getting decays.
Habits of teeth clenching during the day and teeth grinding during the night can be caused by eruption of teeth or everyday stress. Underlying malocclusion with interferences of normal biting can cause sore jaw too.
Unwanted movement neighbour or opposite teeth that might result in loosening of those teeth. Long-term wise, loss of bone and soft tissues can happen gradually which can compromise future implant surgery.