All Teeth Falling Out
Scholars have said that the falling out of all teeth in a dream carries different interpretations; if the teeth fall out and the dreamer collects them in his sleeve or lap, it indicates a long life and an increase in family members and offspring. If all of them fall out and are in his hand or possession, it also symbolizes a multitude of descendants for that household. However, if all teeth fall out without being collected, it may suggest that his relatives will die before him, an interpretation held by some scholars like Sa'id ibn al-Musayyab.
Per Ibn Sirin's Muntakhab al-Kalam fi Tafsir al-Ahlam
Note: These are traditional scholarly interpretations (ijtihad) drawn from a specific classical source — not a binding religious ruling, fortune-telling, or a prediction of the future.