if your disability makes it difficult for you to leave bed to brush your teeth, Colgate makes a product called Wisps that are single use, no-rinse toothbrushes you can use while in bed. They have a bead on the brush that dissolves and acts as toothpaste and can be swallowed. The other end has a toothpick.
[Image Description: Toothbrush that has a blue gel bead at the centre of the brush part. End ID.] Reblogging in case this is helpful for anyone. Also sharing a post I made a while ago about dental hygiene when you're chronically fatigued. (including some awesome tips from @energysavingselfcare) I wrote that post when I used to brush teeth sitting down; I've now been brushing my teeth in bed for several years. I can only brush my teeth once a day (using an electric toothbrush) and use a higher fluoride toothpaste, prescribed by my dentist.