Our Blog

What is biofilm?

June 10th, 2026

Biofilm, the protective housing for bacteria, is a hot topic in the medical and dental fields. Routinely taking an antibiotic for a bacterial infection has become more complicated because of biofilm. Bacterial infections may become resistant to antibiotics in part because the biofilm allows for communication among the bacteria, allowing the infection to be sustained.

You’re probably wondering, Dr. Kelly Peterson , what does this have to do with teeth? Since we’re dental professionals, we can tell you why it’s important and what you should know! There is biofilm in your mouth; healthy biofilm and diseased biofilm. Both are made of the same general compounds, but when combined with certain amino acids and cellular chemicals, the diseased biofilm conquers and destroys.

Periodontal disease, otherwise known as gum disease or pyorrhea, is a biofilm disease. If you are undergoing treatment for gum disease and you do not continue with the treatment plan the disease will progress and/or spread due to the biofilm.

There are several ways to treat diseased biofilm. But remember, antibiotics cannot touch the bacterial infection if the biofilm is established.

When your exam is complete, the Ultrasonic or Piezo Scaler should be used. This method of spraying water disturbs the biofilm and provides an opportunity to treat the infection causing bacteria.

Remember, we all need healthy biofilm. Just as your skin protects your body, biofilm housing good bacteria protects your body. The bacteria in the biofilm replicate every twenty minutes. If your body has healthy bacteria, low levels of hydrogen peroxide are produced by the biofilm, preventing harmful bacteria from residing. Harmful bacteria do not like oxygen.

At your exam, we will take measurements around your teeth checking for “pockets”. The higher the number, the deeper the pocket giving more room for harmful bacteria where there is no oxygen. Ask what your numbers are and be involved in restoring your healthy biofilm.

Getting Ready for Summer Sports

June 3rd, 2026

With the warmer and longer days here, we know many of our patients at Northwest Smile Design will be much more active in the summer. Though most of our patients are probably already ready to hit the field for some summer fun, we thought we would discuss a few precautions to take when it comes to keeping your teeth safe as you enjoy playing your favorite sports.

Use a Mouthguard

Are your kids participating in contact sports this summer? If the answer is yes, we strongly encourage you to have them fitted for a mouthguard at Northwest Smile Design before the season starts. Athletes can avoid serious mouth and jaw injuries by using a mouthguard.

Be Mindful of Sports Drinks

While sports drinks can be refreshing after a game, they unfortunately contain high levels of sugar and citric acid, which are known to erode the teeth and reduce the minerals in the outer tooth enamel. The simplest way to prevent sports drinks from damaging your teeth? Avoid them completely and drink water instead. Water is a great option to keep you hydrated before, during, or after a game.

Floss, Floss, Floss

While we always tell our patients about the importance of flossing, it is especially important on the day of the game. Athletes are likely to consume more sugar; from energy bars and chews to gum, you are not doing your teeth any favors. All that sugar may give you that extra bounce in your step when out on the field, but we want you to remember to floss when you get home, or else contend with an increased risk of cavities down the road.

If you have any questions about keeping your teeth and mouth healthy while participating in summer sports, please give us a call at our Marysville, WA office! Have fun!

Understanding Cavities

May 27th, 2026

Getting a cavity seems like delayed punishment for eating that special dessert every weekend or for the few days you forgot to floss. When you are doing everything right with minimal exception and a cavity is diagnosed, it is discouraging. Knowing how cavities form and what causes them is valuable in knowing how to prevent them. In this blog post, Dr. Kelly Peterson will help you understand cavities!

A cavity is not a one-time event. It is actually a symptom of a disease called caries. Tooth decay is a result of an active infection and condition in the mouth. There are ingredients to this infection, which include bacteria, acid, your tooth, and a food source. The main bacterial culprit is S. Mutans. Bacteria live in a housing structure called biofilm. This offers them protection, food, and an ideal replicating environment.

Biofilm can be healthy if there is a balance of good bacteria. When you have caries, the numbers of “bad” bacteria increase and produce an environment where they thrive and therefore cause tooth decay. A main indicator of this is a pH measurement of your saliva.

Several factors can influence the biofilm pH. Foods and beverages all have different pH levels. The lower the number, the higher the acidity. Since acid promotes tooth decay, a beverage like soda will promote a cavity. Water, being neutral, is a good choice to promote healthy oral pH. Healthy eating can still cause cavities. Here is an example of a highly acidic, yet traditionally healthy meal:

Toast with store-bought strawberry jam, and a cup of cottage cheese topped with fresh cranberries.

Instead, here is a better choice, which involves mixing acidic healthy foods with alkaline (non-acidic) foods to reduce the overall pH:

Toast with almond butter, and Greek yogurt topped with fresh blueberries.

The first example will result in a very low pH in the mouth and even in the rest of the body. The second meal mixes highly acidic blueberries with an alkaline Greek yogurt. Dairy products from cows are highly acidic. Toast is acidic because of the yeast and almonds are alkaline.

A natural buffer is saliva. Whenever mouth breathing or medications compromise the saliva flow, the pH is going to drop and caries can go rampant. Getting a cavity is not just about the sweets or forgotten flossing sessions. It is about the pH levels and bacterial management.

For more helpful tips about how to avoid cavities, contact our Marysville, WA office.

Memorial Day

May 20th, 2026

Memorial Day is not only a federal holiday in the United States, but it is a day of observance and remembrance of those who died in service. Originally known as Decoration Day, this solemn day has been marked on calendars since the end of the American Civil War as a day to commemorate both the Confederate and Union soldiers who fought and died in the war.

Marking the graves of fallen soldiers with flowers, wreaths, or other tokens has been practiced throughout history, but it wasn't until the mark of the end of the Civil War that a special day was decided upon as the one to spend in remembrance. By 1890, every state in the country was observing Decoration Day. It wasn't until 1967 when the name formally changed from Decoration Day to Memorial Day, in order to encompass all fallen American soldiers in all wars and conflicts. In June of 1968, Congress moved the official date of Memorial Day to the last Monday in May in order to create a three day weekend.

Today, while there is certainly an air of remembrance on Memorial Day, it has become more a day of spending time with family, friends, and other loved ones. This day is also heralded as the start of summer, with many schools finishing for the year around this time. Our team at Northwest Smile Design remembers it as a day to take solace and remembered those lost.

Traditional observances of Memorial Day are still held, and they often involve raising the American Flag then lowering it to a half-staff position until noon, and then raising it once again to its full height afterwards. The flag is lowered to remember those who've lost their lives while in service to their country, and then it is raised to signify our willingness to not let their sacrifice be in vain.

From community parades in the Marysville, WA area, backyard cook-outs, and fireworks to formal ceremonies, Memorial Day is commemorated in many different ways. No matter how you choose to spend this day, take a moment to remember those who've lost their lives in an effort to preserve our freedom.

(360) 658-7750 5100 Grove St, Ste B
Marysville, WA 98270

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Wed 8:00am-5:00pm
Thurs 8:00am-5:00pm
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American Dental Association American Academy Of Cosmetic Dentistry Washington State Dental Association
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