Gum disease is a bacterial infection of the tooth supporting structures of your mouth ie your gums, the fibres that attach the tooth to your jaw bone (periodontal ligament) & the bone surrounding your teeth. Gum disease begins with plaque. Plaque is continually forming on your teeth, without you even knowing it. Plaque is a bacterial colony. This plaque formation creates a layer on your teeth called a"Biofilm". The following film clip shows in vitro plaque biofilm formation, using time lapse photography, starting with a clean tooth over an 8 hour period ie plaque forming on a tooth over an 8 hour period.