Is it permissible for a dentist to sell extracted teeth to dental students for training purposes, knowing that they are thrown in the trash and not buried or given to the patient, and what is the ruling on the money collected from this sale if it is unlawful?

It is not permissible to sell anything from a human being, such as hair or teeth, due to Allah's honoring of humanity, and because selling them is a degradation of humans. The jurists are in agreement on this. Money earned from selling teeth is unlawful and must be disposed of through charity. It is permissible to practice on a tooth separated from a living being for the purpose of learning, and burying extracted teeth is better than throwing them in the trash, though it is not obligatory to do so.