There's a party going on in your mouth, to which you might not have been invited. The human mouth can be home to more than 700 species of <strong>germs</strong>, some of which might be more harmful than others. While many types of germs will help break down food and actually protect your teeth, some, such as <em>Streptococcus mutans</em>, play a part in tooth cavities, and others, such as <em>Porphyromonas</em><em> </em><em>gingivalis</em>, can lead to gum problems. If you've ever dealt with bad breath, you can blame germs for that, too.Luckily, figuring out how to kill mouth germs isn't that tricky. It comes down to developing a great at-home oral care routine and doing what you can to minimise the presence of the bad germs.