Adult Tooth brushing

Tooth brushing should be completed twice a day with a pea sized amount of fluoride toothpaste for at least 2 minutes. For effective cleaning, we must make sure we clean the front, back and biting surfaces when brushing so that all surfaces are covered. The evening clean is the most important clean of the day, this is because our saliva flow reduces at night when we are asleep and saliva has protective properties for the mouth. After brushing you should spit out the toothpaste but not rinse if off with water, leaving this small residue of toothpaste behind will increase the protection for your teeth.
Toothbrush/toothbrush heads should be changed at least every 3 months; a worn toothbrush does not clean your teeth effectively. A soft/medium textured toothbrush with flat bristles is the most ideal brush to use. If toothbrush filaments are too hard or if you use the wrong technique you are at risk of causing damage to your teeth or gums. 
The toothbrush head should be angled at a 45 degree angle towards the gum line and a light rotational movement should be used, this ensures that the filaments clean the gum line.  Studies show that a rotational electric toothbrush is the most efficient at plaque removal however see below demonstration videos for both a manual and electric toothbrush
A pea sized amount of toothpaste for adult brushing
Pea sized amount for adult electric toothbrush