A missing tooth can negatively affect the way you speak, depending on its location.
The loss of one or more teeth can cause the redistribution of bite pressure onto other teeth. Over time, this can cause the teeth to shift and move into the space the tooth once held.
Shifting teeth can make it easier for plaque to accumulate in hard-to-reach places. This can increase the risk of gum disease, which can lead to additional tooth loss.
The teeth are place-holders in the jaw. When one falls out and is not replaced, the bone that once surrounded it begins to deteriorate and wear down.
A missing tooth leaves a visible gap between the teeth and can be a source of embarrassment and insecurity.