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What Does Marijuana Do to your Oral Health?

Friday - January 31st, 2020
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Does smoking pot damage your teeth?

Now that marijuana is legal in many states for recreational or medicinal purposes (or both) we will soon have more comprehensive data to evaluate on the true oral health effects of cannabis use. To this day, we are still learning about what marijuana does to your oral health. Even without a plethora of scientific research, dentists have collected anecdotal evidence from their patients over the years. Recreational marijuana users or those that use cannabis for a health condition should read this information to find out how marijuana use is believed to impact your oral health.

What You Need to Know About Marijuana

Marijuana is the second most widely used psychotropic drug in the United States behind alcohol. Now that marijuana is no longer illegal in many states and is used by more people, it’s a great time to learn some basics about it and to clear up the misconceptions.

There is evidence that marijuana was used medicinally and spiritually throughout the last 5,000 years of history in Ancient Egypt and China, India and Rome. Hemp-the fiber of the cannabis plant-was often grown in 1600s America to make clothing, sails, and ropes. By the 1800s marijuana had been accepted in mainstream medicine and was used to treat opioid withdrawal, stimulate appetite, and relieve nausea and vomiting.

Cannabis (otherwise known as weed, pot, grass, dope, marijuana, hash and other names) is a cannabinoid drug-one that joins with cannabinoid receptors in the body and brain. These receptors in the central nervous system are part of the endocannabinoid system which plays a role in many physiological processes including pain, mood, memory, sleep, and appetite. Basically, cannabinoids impact the way cells send and process messages and users get a mild sedative or mood-enhancing effect when using marijuana recreationally. In clinical applications, it can relieve pain and prevent nausea.

The most common form of cannabinoids is cannabis, the dried leaves and buds (flowers) of the Cannabis sativa plant that is smoked in a joint (rolled in paper) or bong (water pipe) and through vaping pens. There are also topical creams, liquids, sprays and oils with cannabis. In addition, marijuana edibles (food and beverage products infused with cannabis) are becoming more widely available.

The cannabinoid THC (tetrahydrocannabinol), one of hundreds in cannabis, causes the psychoactive effects of the drug and makes users feel high. CBD (cannabidiol) is a nonpsychoactive compound extracted from either hemp or marijuana and is available in oils, supplements and other carriers. CBD was approved by the FDA to treat certain forms of epilepsy. Many people use CBD to get relief from anxiety, depression, and insomnia, but CBD doesn’t make them feel high because it doesn’t have THC.

Marijuana’s history and acceptance in America has evolved over time. Initially, it was used as a painkiller and an ingredient in many medications as well as used recreationally when Mexican immigrants first introduced the concept to the United States. Later, marijuana became popular in the counterculture of the 1960s as a harmless high. Marijuana was classified as a Schedule 1 drug-as are heroin and LSD-when the United States Congress passed the Controlled Substances Act in 1970. The act also stated that marijuana had no medicinal value which then made it difficult for doctors and scientists to continue to study its health benefits.

Today, marijuana remains illegal under United States federal law. However, many states have now legalized its sale for medical and/or recreational use. As of January 1, 2020, 11 states have fully legalized marijuana following Colorado’s lead-the first state to legalize marijuana for recreational use in 2014.

How Marijuana Affects Oral Health

At this time, it is believed that the negative oral health effects of marijuana occur when you smoke it, similar to smoking tobacco. Frequent pot smokers typically have more issues with gum inflammation and disease. However, since marijuana smokers also usually have a higher rate of smoking tobacco, using alcohol and other drugs, generally made less visits to the dentist for preventative care, and often didn’t properly brush and floss, a direct link to marijuana was difficult to make. But as a more diverse population begins to use marijuana, researchers and dental professionals will be able to gather more evidence to determine the true effects of just marijuana on oral health. Regardless, these issues are fairly common with marijuana smokers.

Gum disease

The heat inhaled when smoking marijuana can irritate the gums and leads to bleeding, swelling and sensitivity. Marijuana smoke, like tobacco smoke, contains carcinogens that can cause gum damage. That’s why pot smokers need to properly care for their gums to prevent gingivitis and periodontal disease.

Tooth decay

One of the most widely known effects of marijuana use is “munchies.” When someone is high and reaches for food and drink to satiate their hunger, they don’t often choose tooth-healthy options. They typically have sugary drinks and processed foods that are well-known to contribute to tooth decay and cavities. This is likely one of the reasons why dentists see a higher rate of caries (tooth decay) in marijuana users especially in teeth that normally aren’t prone to decay.


Another common experience when smoking pot is “cotton mouth.” Dry mouth (xerostomia) is caused by under-functioning salivary glands. The THC in pot sends signals to the endocannabinoid receptors to limit saliva production when smoking pot. Saliva is important to good oral health because it flushes out bacteria, prevents bad breath, helps break down food, prevents high levels of plaque build-up, slows down tooth decay and more.

Discolored teeth

Over time, your teeth will likely get stained from the marijuana smoke with continued use. Even with good oral hygiene and regular trips to the dentist, discoloration is still likely to happen when smoking pot, for this reason, you might want to consider whitening solutions.

Increased levels of bacteria

Cavity-causing bacteria seems to increase in the mouths of those who smoke marijuana. Some studies suggest that this is because smoke from cannabis suppresses the immune system in the mouth. The more bacteria in your mouth the higher chance of developing cavities.

Good Oral Hygiene Habits for Marijuana Smokers

Now that you are aware of the potential negative effects of marijuana on your oral health, there are things you can do to minimize the impact:

It’s important to be open with your dentist regarding your lifestyle so that they can advise and inform you about the best way to keep your mouth and teeth healthy and so they can provide the care you need. Although more research needs to be done on the effects of edible marijuana products, currently it appears that several of the negative oral effects are caused by actually smoking pot. Therefore, consuming edibles as an alternative to smoking pot might be a good strategy to protect your oral health. Along with brushing, flossing and rinsing daily, be sure to schedule your regular teeth cleaning and dental exam today.