What is the best toothbrush to use for gum disease?

Electric. I think an electric toothbrush like oral-b or sonicare is what you should get.
Sonicare? We recommend some type of sonicare most often, but the oral-b electric brushes do a great job too.
Probably soft. The best is probably a soft toothbrush, because it does not damage and inflame the gums. The best person for this answer would probably be the dentist.