If you lose a bottom molar (such as tooth number 3), the adjacent teeth could start to move to close the gap where an existing tooth used to be. Teeth movement could compromise your bite, which could give you TMJ, moderate periodontitis, gum recession. TMJ issues can cause headaches, back pain, or even locked jaws.
Overtime, minor tooth movement can cause gaps in your teeth where food can get stuck causing periodontal problems that give you bad breath, bleeding gums, bad mouth taste issues.