Dreams about teeth, especially losing them or having them break, often relate to feelings of insecurity, anxiety, or concerns about one's appearance. In your case, the fake tooth falling out and breaking could symbolize a fear of losing something that is important to your self-image or social standing. It might also reflect worries about not being able to maintain a facade or a sense of control in your life.

Putting the tooth back in your mouth suggests a desire to regain control or to restore your image, even if it feels artificial or temporary. This could indicate that you are trying to cope with a situation where you feel vulnerable or exposed.

Consider reflecting on any recent changes or stressors in your life that might be causing these feelings. It may be beneficial to address these underlying issues to help alleviate your anxieties.