Is it permissible to supplicate for healing from incurable diseases and for teeth to regrow after falling out?

Supplicating for healing from chronic diseases is permissible and not an transgression in supplication, because Allah has not created a disease without also creating a cure for it. As for supplicating for the growth of teeth after they have fallen out for the second time, this is an transgression in supplication because it is usually asking for the impossible. Scholars have stipulated that asking for something that goes against the laws of Allah Almighty is considered an transgression. Examples of this include: asking to be immortal until the Day of Judgment, or to be relieved of the necessities of human nature, or to be informed of His unseen. However, supplicating for the growth of primary teeth or for the facilitation of implanting other teeth is permissible and not considered an transgression.