Missing several teeth can severely influence your daily life. It can affect your general health, your appearance and self-esteem.
When you lose teeth, it disturbs the interplay between teeth and bone. Gum and bone are no longer stimulated well enough due to the missing teeth, so the jaw bone starts shrinking and your gum pulls back. This can weaken neighboring teeth until they collapse. Teeth in the opposite jaw can then start growing into the gap.
Missing teeth and a reduced jaw bone can make your face look older and wrinkly, and for your cheeks to become hollow and saggy, because they can no longer fully stabilize your lips and cheeks from the inside.