Most people think cavities are simply the result of not brushing enough, but that’s not the whole story.
While you can’t “catch” a cavity like you would a cold, the bacteria that cause cavities can spread from person to person. The main culprit is a type of bacteria called Streptococcus mutans.
This article will explain how these cavity-causing bacteria are transmitted, who is most at risk, and what you can do to protect yourself and the people you care about. Yes, cavities are contagious in some ways, and we’ll tell you how.
Understanding Cavities and Their Causes
To understand how cavities can be “caught,” it’s helpful to understand what they are and how they form.
What is a Cavity?
A cavity is essentially a hole in your tooth caused by tooth decay. The decay process starts in the enamel, which is the hard, outer surface of your tooth, and if left unchecked, it can move inward toward the dentin and pulp.
In the very early stages, tooth decay can sometimes be reversed through remineralization, a process that restores minerals to the enamel.
What Causes Cavities?
Cavities are caused by bacteria, most commonly Streptococcus mutans. These bacteria, along with food particles, form a sticky film called plaque.
The bacteria in plaque produce acids that attack and erode your tooth enamel, a process called demineralization. Over time, this acid erosion leads to the formation of a cavity.
How cavity-causing bacteria are contagious
So, how exactly do these cavity-causing bacteria make their way from one mouth to another? Through saliva, mostly.
How bacteria spreads
Because cavity-causing bacteria are spread through saliva, activities such as sharing forks or spoons, sipping from the same cup, and kissing can easily spread the bacteria. Even sharing chapstick can do it!
Who is most vulnerable?
Infants and young children are particularly vulnerable, as they haven’t yet built up a strong defense against these bacteria.
Unfortunately, parents can unknowingly pass these bacteria to their children. Something as innocent as tasting food to make sure it’s not too hot before feeding it to your little one can transfer bacteria.
Preventing the spread of cavity-causing bacteria
Even though cavities are common, you can take steps to protect yourself and your loved ones. Here are some tips for reducing the spread of Streptococcus mutans and other cavity-causing bacteria:
Oral hygiene practices
- Brush and floss: Brush your teeth twice a day and floss once a day to remove plaque and bacteria.
- Mouthwash: Swish with mouthwash to kill bacteria and freshen your breath. A mouthwash with chlorhexidine may be more effective.
- Fluoride toothpaste: Use toothpaste that contains fluoride to strengthen your tooth enamel.
Lifestyle adjustments
- Limit sugary foods and drinks: Try to cut back on sugary snacks and beverages.
- Boost saliva production: Saliva helps wash away bacteria. Drink plenty of water and chew sugar-free gum with xylitol to help your mouth make more saliva.
Parental precautions
- Avoid sharing: Don’t share utensils, cups, or food with infants and young children.
- Proper cleaning: Clean pacifiers and toys regularly to prevent the spread of bacteria.
How can my dentist help prevent cavities?
The best way to prevent cavities is to visit your dentist regularly for checkups and cleanings. Your dentist can spot decay early, when it’s easiest to treat. If you’ve already developed a cavity, your dentist may recommend treatments such as:
- Fillings
- Crowns
- Root canals
The right treatment will depend on how advanced the cavity is.
Frequently Asked Questions
Are cavities contagious in NHS?
Yes, cavities are contagious, including within the NHS (National Health Service) system. The bacteria primarily responsible for tooth decay, Streptococcus mutans, can be transmitted through saliva. This means activities like sharing utensils, kissing, or even close contact can spread these bacteria, potentially leading to cavities in another person’s mouth if they’re susceptible.
Is it okay to kiss someone with a cavity?
While kissing someone with a cavity isn’t inherently dangerous, it does increase the risk of transmitting the bacteria that cause tooth decay. If you or your partner are prone to cavities, it’s wise to take extra precautions. This includes maintaining good oral hygiene (brushing, flossing, and using mouthwash), limiting sugary snacks, and scheduling regular dental check-ups. If you’re concerned, discuss preventative measures with your dentist to minimize the risk of bacterial transmission. Ultimately, whether or not you kiss someone with a cavity is a personal decision, but awareness and good oral hygiene practices can help mitigate the risk.
Conclusion
To recap, cavities themselves aren’t contagious. But the bacteria that cause cavities can spread, especially to babies and young children.
Fortunately, you can take steps to prevent the spread of cavity-causing bacteria. Good oral hygiene, smart lifestyle choices, and a few simple precautions can make a big difference.
Understanding how cavity-causing bacteria are transmitted can help you protect your oral health and the oral health of the people you love.