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Why Our Teeth Matter: Dental Hygiene 101

By Debi Sparks January 06, 2026 Health and Fitness

Over the years, like all mothers, I embarrassed my children on a regular basis. I had a variety of ways of doing this, but one of the most embarrassing was when I’d approach perfect strangers in the dental aisle of the grocery store. As a dental hygienist and an educator, when I saw someone confused over which toothbrush or toothpaste to buy, I ignored my kids’ pleas (“MOM! That is a stranger! Stop talking to them!”) and I’d try to help. I almost couldn’t help myself and it looks like I still can’t!

Much has changed since I graduated from Dental Hygiene school in 1983. At that time older adults assumed they would lose their teeth. Both the importance of teeth to overall health and the link between oral health and overall health had not been established. Back then medicine didn’t recognize that the head was actually attached to the body!

Today, only about 5% of people over 65 wear full dentures and the benefits of keeping your teeth along with a healthy oral cavity are clear. Let’s look at why the health of your teeth and the oral cavity is important to your overall health, what causes tooth loss, and the challenges that we experience in caring for our teeth as we age.

How the Teeth and the Oral Cavity Affect the Body

Missing and broken teeth affect your bite and can cause grinding and clenching. This can irritate jaw muscles and lead to pain and headaches.

Missing and broken teeth can impact speech clarity.

Food digestion starts in the mouth. Without a functioning dentition and salivary glands food cannot be properly chewed and mixed with enzymes in the saliva to prepare it for proper nutrient absorption. The inability to chew properly can lead to a higher risk of choking and discomfort in digestion.

The oral cavity has a microbiome, a collection of microbes such as bacteria and viruses. As with the gut microbiome, an imbalance of healthy microbes to harmful microbes causes the immune system to respond with inflammation and a variety of health problems.

Chronic inflammation occurs when harmful bacteria form plaque along the gumline. This chronic inflammation can affect both Type I and Type II Diabetes, as well as other chronic diseases.

What Causes Tooth Loss

Bacteria/Decay

Bacteria in the mouth produce acids which break down enamel leading to its destruction. Early enamel loss can be reversed (good news!), but if not, bacteria can further break down the tooth and eventually enter and infect the tooth’s nerve.

Gum Disease

Bleeding gums, when brushing is not normal, is a sign of early gum disease known as gingivitis. Untreated gingivitis can lead to an advanced type of gum disease known as periodontitis. Periodontitis causes destruction of the teeth’s bone support system, loosening the teeth.

Other Factors

Contributing factors include smoking, sugary and/or acidic foods and drinks, frequent snacking, and poor oral hygiene practices.

Age Related Challenges

As our lifetimes extend, some of the oral and physical changes we experience can make caring for our teeth more challenging. Several factors increase the incidence of tooth loss in older adults.

Dry Mouth

As we age, our bodies naturally create less saliva and that, coupled with medications which cause dry mouth, contributes to a greater risk of decay.

Exposed Roots

Remember when elders were called “long in the tooth”? This is because even in healthy mouths some bone loss occurs over decades and with that comes root exposure. The root, without enamel to protect it, is more susceptible to decay.

Acid Reflux

Stomach acids can erode enamel.

Love of Sweet Treats

Age related predilection to sweet flavors.

Dexterity Changes

Arthritis and neurological changes can make brushing and flossing more difficult.

Access to Care

This can be due to finances, inadequate insurance, lack of transportation, low health care literacy, and mobility challenges in the dental office itself.

As we have learned in our many decades of life, knowledge is power! In the next articles I’ll be sharing best practices for caring for your teeth and oral cavity, preventing dental diseases, and accessing care. If you have any topics you’d like me to address that would be of general interest to our peer group, please comment below.

Let’s Have a Conversation:

How well do you care for your teeth? Do you do it for better health or to keep your smile bright? In what area of oral health do you think you lack enough information?

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Becky Beckett

I’ve recently started Fosamax and am somewhat concerned re necrosis of the jaw. X-rays already show bone loss in the jaws, and have previously lost 2 teeth on upper right side. I have been very attentive to dental hygiene for decades. Brush with Sonicare, floss, scrape tongue- all twice a day, and Waterpik three times a week. Anything else I need to be aware of/can do?

Debi Sparks

Thank you for commenting. My understanding, and I am NOT a dentist or a physician, is the risk of osteonecrosis of the jaw when taking bisphosphonates like Fosamax is specific to taking high doses and having tooth extractions.
Please confirm this with your dentist and or physician and keep up the great oral health practices you have going! More on this in a future article.

Kat

Have never seen anyone with bad teeth and good health. I brush twice a day and TRY to floss daily(about 5 days a week average) and address any dental issues promptly. Have had much, expensive (is there any other dental care as even dental insurance has limited coverage, prices in NYC are wild).

In spite of all, I have some lost/broken teeth (molars) and now seeking care from NYU dental.

I avoid soda, juice, sticky sweets and drink lots of water. No gum disease. No smoking or vaping, these are awful for teeth. I like coffee and iced tea, both unsweetened, I avoid sugar.

Debi Sparks

Thank you for commenting. Unfortunately many of us had dental practices and dental work as kids that has affected us as adults.

Seeking care from a dental school is a great option!

Karen

Well, this is a nice list of problems with very few action suggestions… especially, for example, how can a person rebuild enamel? It was like a teaser to incude this claim without saying what we can actually do.

Debi Sparks

Thank you for your comment. In this article my intention was to start a conversation on the importance of keeping our teeth. I will be following up with best practice suggestions in the next articles. I will absolutely include information on how to rebuild enamel!

Vegan poet

I make sure I brush my teeth twice per day.

Debi Sparks

Fantastic! It all starts with the basics!

The Author

Debi Sparks is a registered dental hygienist, holds a master's degree in education, and is a mindfulness meditation facilitator. She is a lover of trying new things, travel, writing, dogs, and chickens. Debi's intention is to soak up life while doing a little bit of good in the world.

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