When confronting nurse about dehydration issues, father confirmed my concerns with head moving up and down and then thumbs up

 His lips were visibly pulled inside mouth hole what I was told is fold of missing prosthesis from mouths, but I pointed out nurse father's neighbor whose mouths were same without prosthesis but none of seen as on photos bellow which I took before departure https://ausertimes.blogspot.com/2022/07/father-appeared-during-visit-as.html