My husband's dentist made him a partial upper denture, but every time he puts it in his mouth he vomits and cannot wear it. What is the cause? Thank you for your answer and kind regards.

Dear Sir/Madam!

The cause is a strong gag reflex. This varies greatly between people; sword swallowers can put five knives down their throat, while others feel like vomiting merely at the thought of it.
For your husband, the denture should be shortened somewhat if possible. In that way the posterior border of the denture would not trigger the gag reflex. If the denture cannot be shortened, other forms of prosthetic rehabilitation should be considered: a denture that does not cover the palate, fixed prosthetic rehabilitation...

Have a nice day!