Rikkard's Things

My dad has tartar and plaque I'm thinking of buying water floss so does it really work on him can it really remove tartar? He is quite old and idk how to help him . You may think why i didn't take him to dental hospital he is scared to go and has mental illness so please help me.

Weight loss tips too he won't walk no matter what i say even if i get angry he won't do it