Arguably the most important way to prevent the onset of gingivitis is to brush your teeth at least twice a day, such as first thing in the morning (after breakfast) and right before going to bed. This will ensure that the plaque that builds up in your mouth over the course of the day and night is removed before it turns into tartar and begins to have a negative impact on your gums.
To increase your chances of preventing gingivitis, consider brushing more than twice a day. Although two brushes a day should be enough to prevent inflammation of the gums, brushing after every meal — including lunch — will do more to keep your mouth healthy. And don’t forget to use about a pea-sized amount of toothpaste, which can help in the removal of plaque and keep your mouth feeling fresh for longer.