Effective Strategies for Strengthening Adult Teeth

Many adults believe that improving tooth health and durability is only possible during childhood, leading to a sense of resignation about their dental health in later years.

Fortunately, adults can enhance their tooth strength through simple lifestyle adjustments. Tooth decay is influenced by oral chemistry, which can be altered at any stage of life depending on dietary choices.

Tooth decay starts when bacteria, like the prevalent streptococcus mutans, produce sticky substances called glucan to attach to teeth and form a protective layer known as plaque. These bacteria feed on sugar and starch, converting them into acid that erodes the enamel and the underlying dentin. This acid-driven erosion, called demineralization, strips teeth of essential minerals like calcium and phosphate.

The key to maintaining strong teeth lies in promoting remineralization, the natural process that reverses the effects of decay.

As your dentist has emphasized for years, brushing twice daily and flossing at least once is essential for removing plaque before it hardens into tartar. However, these habits are just the beginning of what you can do to ensure your adult teeth remain robust.

Get Enough Fluoride

Your dentist was correct about another crucial factor: fluoride's importance. The American Dental Hygienists' Association highlights that water fluoridation has significantly reduced tooth decay in the U.S., cutting rates by 50 to 60 percent since World War II.

Fluoride, a naturally occurring element, strengthens tooth enamel by enhancing the durability of its crystalline structure. It aids in remineralization, making teeth more resistant to acid attacks and decay. Additionally, fluoride can inhibit bacteria from producing excessive acid.

Fluoride can be delivered to teeth in two primary ways. Topical fluoride is applied directly via toothpaste, dental treatments, or mouth rinses. Systemic fluoride is ingested through water, supplements, or food, and it benefits teeth by being present in saliva. Foods like fish and tea, particularly green tea, are rich in fluoride, with green tea containing twice as much as black tea.

A growing concern for adults is the decline in fluoride intake due to increased bottled water consumption. Many bottled waters lack fluoride, especially those treated with reverse osmosis, which removes up to 95 percent of the element. If your bottled water doesn’t contain fluoride, ensure you’re getting it from toothpaste or other sources.

Foods that Strengthen Teeth

Green tea benefits teeth not only due to its fluoride content but also because it contains catechin polyphenols, which combat bacteria linked to gum disease and decay. Research from Tohoku University Graduate School of Medicine in Japan found that men who drank at least one cup of green tea daily were 19 percent less likely to lose teeth compared to non-drinkers [source: Marshall].

Cranberry juice and red wine, both rich in polyphenols, are effective at fighting decay-causing bacteria, though they may stain teeth. Pairing red wine with cheese after meals is beneficial, as cheese neutralizes acid and stimulates saliva production. A study found that regular cheese consumers had 71 percent less enamel damage compared to those who avoided cheese [source: Smith].

Cheese is also a valuable source of calcium, essential for strong teeth. Other calcium-rich foods include canned salmon or sardines (with their edible bones), dark leafy greens, blackstrap molasses, low-fat dairy, almonds, Brazil nuts, and sunflower seeds.

If you prefer a sweet treat over something savory, there’s good news. Research shows that cocoa extract can protect teeth more effectively than fluoride [source: Tufts University]. This is attributed to theobromine in cocoa, which strengthens tooth enamel. For maximum benefits, opt for darker chocolate.

Other tooth-friendly treats include pure licorice (the Chinese herb, not candy), which combats streptococcus mutans, and chewing gum, which increases saliva pH to neutralize acids. Xylitol-based gum is particularly effective, as the bacteria cannot metabolize it, leading to their eventual toxicity.

Foods high in phosphorus, such as meat, fish, and eggs, along with magnesium-rich options like spinach and bananas, also contribute to stronger teeth.

Vitamins for Strong Teeth and Gums

Calcium is vital for strong teeth, as they are essentially bone. However, the body requires vitamin D to absorb calcium, as it produces calcitriol, a hormone essential for this process. Individuals under 70 should aim for 600 IU of vitamin D daily, increasing to 800 IU for those older [source: NIH Osteoporosis and Related Bone Diseases National Resource Center]. Vitamin D is found in egg yolks, liver, fatty fish like salmon, tuna, mackerel, and fortified milk, as well as through sun exposure and supplements.

Vitamin A plays a crucial role in strengthening bones and teeth. It is available in animal-based foods like eggs, liver, and milk, as well as in plant sources such as beta-carotene-rich vegetables, including carrots, sweet potatoes, spinach, and cantaloupe.

Strong teeth are only as good as the gums that support them, making vitamin C essential for gum health. This vitamin maintains the integrity of connective tissues, including gums. Citrus fruits, strawberries, broccoli, peppers, tomatoes, and various other fruits and vegetables are excellent sources of vitamin C.