
Diet has a significant impact on dental health, and certain foods can cause tooth decay and cavities, which can lead to changes in teeth position. Sugary and starchy foods, for example, contribute to plaque buildup, which releases acids that attack tooth enamel. This can result in cavities, causing pain, chewing problems, and tooth abscesses. Additionally, a diet low in fat can interfere with the absorption of fat-soluble vitamins, weakening the jawbone and leading to tooth movement or loss. On the other hand, a well-balanced diet that includes whole grains, vegetables, fruits, and lean proteins can help support dental health and prevent tooth decay.
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What You'll Learn

Sugary foods and drinks
To control the amount of sugar you consume, read nutrition facts and ingredient labels on foods and beverages and choose options that are lowest in sugar. Common sources of sugar in the diet include soft drinks, candy, cookies, pastries, honey, raisins, dried fruits, and molasses. These items are best enjoyed in moderation and followed by good oral health habits such as brushing and flossing. It is also important to limit between-meal snacking as this reduces acid exposure for your teeth. If you snack, choose foods that are not fermentable carbohydrates.
In addition to the direct impact of sugar on teeth, a diet high in sugar can also contribute to gum disease. A nutrient-depleted diet increases the production of plaque and can lead to a loss of minerals in the teeth, making the mouth more susceptible to infection and gum disease. Severe gum disease is a major cause of tooth loss in adults.
It is worth noting that manufacturers often add sugar to reduced-fat products to maintain taste and texture. Therefore, when choosing a low-fat diet, it is important to be mindful of sugar content as well.
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Carbohydrates and starches
The frequency of consumption, texture, and duration of exposure to different carbohydrates are important factors that influence dental caries formation. Foods that cause a larger decrease in plaque pH have a greater cariogenic potential, and therefore, measuring plaque pH is considered a valid method to assess the cariogenic capacity of different foods and beverages. The detrimental impact of sugary foods, such as carbonated beverages, fruit juices, and sweet or sticky snacks, on dental health has been widely studied. These products typically produce a large drop in dental plaque pH. However, some beverages, such as malted milk-based drinks, may have a protective effect.
To reduce the harmful effects of carbohydrates on oral health, it is recommended to drink water while consuming carbohydrates to help wash away the sugars. Additionally, brushing your teeth shortly after eating can limit the time that bacteria and sugars have to create the harmful acid that causes tooth decay.
Research on oral health commissioned by the WHO suggests that consuming whole grain carbohydrates is preferable to processed carbohydrates for maintaining oral health. This is because processed starches can be broken down into sugars in the mouth by amylase, increasing the risk of cavities. In contrast, whole grains may offer protection against gum disease and potentially lower the risk of oral cancer.
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Lack of vitamins and minerals
A diet lacking in vitamins and minerals can have a detrimental effect on teeth and gum health. Vitamin deficiencies can cause oral health issues, and mineral deficiencies can affect the hard structures of teeth and bones.
Vitamin D helps the body absorb calcium and phosphorus, which are essential for strong teeth and bones. A lack of vitamin D can lead to cavity development. Vitamin D can be obtained through exposure to sunlight, and it is also found in fatty fish, egg yolks, mushrooms, and fortified foods.
Vitamin C is important for gum health, helping to prevent bleeding and infection, as well as aiding in the production of collagen, which supports the tooth structure. It also helps rebuild tooth enamel, making teeth more resistant to decay.
Vitamin B12 helps to form red blood cells and break down homocysteine, an amino acid that can damage tooth enamel. A deficiency in vitamin B12 can lead to bad breath, mouth ulcers, and the detachment of connective tissues supporting the teeth.
Calcium is crucial for building and maintaining strong teeth and bones. It helps protect tooth enamel from acid erosion. A calcium deficiency can lead to osteoporosis, a condition characterized by bone weakening. When osteoporosis affects the jawbone, it can result in tooth loss as the jaw becomes too weak to support the teeth.
Phosphorus is the second most abundant mineral in the body after calcium. It works together with calcium to strengthen tooth enamel and prevent cavities.
In summary, a lack of vitamins and minerals can weaken tooth enamel, increase the risk of cavities, and contribute to gum disease. Ensuring a balanced diet that includes essential vitamins and minerals is vital for maintaining good oral health and preventing dental problems.
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Acidic foods and drinks
Tooth erosion is permanent, and once it occurs, you may need fillings, crowns, a root canal, or even tooth removal. Veneers may also be an option to restore the appearance of your teeth. Some common signs of erosion include tooth sensitivity, discoloration, rounded teeth, transparency, and cracks.
- Carbonated beverages, including sparkling water, which contain carbonic acid (dissolved carbon dioxide) that lowers the pH.
- Citrus fruits, such as oranges and lemons, which can be particularly harmful if sucked on or chewed.
- Soft drinks, especially soda and sports drinks, even if they are sugar-free.
- Dried fruits, including raisins, which are sticky and adhere to teeth, allowing the acids produced by cavity-causing bacteria to harm teeth long after consumption.
- Sour candies, which are almost as acidic as battery acid and use citric acid to achieve their desired effect.
- Coffee, which is very efficient at weakening tooth enamel and causing erosion.
- Pickled foods, which can also weaken tooth enamel.
- Wine, which contains tannins, a powerful acid.
- Honey, which has an average pH of 3.9, making it more acidic than soft drinks.
- Yogurt and ice cream, which are dairy products with strong acids, especially when concentrated.
To prevent tooth erosion from acidic foods and drinks, it is recommended to:
- Rinse your mouth with water after consuming acidic foods and drinks.
- Drink milk or eat cheese or other calcium-rich foods after consuming acidic foods and drinks to help neutralize acids.
- Chew sugarless gum to increase saliva production, which helps protect teeth.
- Wait at least 30 minutes before brushing your teeth after consuming acidic foods and drinks to give your enamel time to resettle.
- Use a straw when drinking fruit juices or acidic beverages to minimize contact with your teeth.
- Eat acidic foods as part of a meal, rather than by themselves.
- Combine acidic foods with low-acidic foods to stabilize the pH balance in your mouth, such as nuts, cheese, oatmeal, bananas, apples, eggs, vegetables, and whole grains.
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Alcohol consumption
Alcoholic beverages are also often high in sugar, providing a fuel source for the bacteria that cause cavities. The bacteria feed on the sugar and produce acids that eat away at the tooth enamel, weakening it and making it more susceptible to decay. Additionally, the acid present in alcoholic drinks can further contribute to the erosion of tooth enamel, lowering the pH level in the mouth and creating an environment more conducive to bacterial growth and enamel destruction.
The colour in alcoholic beverages can also stain the teeth. Chromogens, the compounds that give drinks their colour, attach to tooth enamel that has been compromised by the acid in alcohol, leading to discolouration. Red wine, sangria, and dark beers are particularly notorious for causing tooth stains.
Heavy alcohol consumption is also associated with an increased risk of oral cancer. The high alcohol content in drinks can alter the rate at which substances penetrate the oral mucosa, potentially contributing to carcinogenesis. Alcohol abuse is a significant risk factor for oral cancer, especially when combined with other unhealthy behaviours such as smoking.
To mitigate the negative effects of alcohol consumption on oral health, it is recommended to drink water alongside alcoholic beverages to stay hydrated and help wash away sugars and acids. Maintaining good oral hygiene practices, such as regular brushing, flossing, and professional dental cleanings, can also help reduce the risk of alcohol-related dental issues.
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Frequently asked questions
A poor diet can lead to gum disease, tooth loss, and cavities, which can cause teeth to shift or loosen. A diet high in sugar and starch can also cause bacteria to build up and eat away at the enamel, leading to cavities and gum disease.
Refined grains, such as white bread, can break down and stick to the crevices between teeth, causing cavities. Sugary snacks and drinks, including hard candies, can increase the acid produced by bacteria, leading to tooth decay.
Yes, alcoholic and sugary beverages can contribute to teeth positioning issues. Alcohol dries out the mouth, reducing saliva production, which is necessary for fighting decay and washing away food particles. Sugary drinks, such as soda, also contribute to enamel breakdown and cavity formation.
A well-balanced diet that includes whole grains, healthy vegetables, fruits, lean proteins, and dairy products is ideal for maintaining dental health. These foods provide the necessary vitamins, minerals, and nutrients to support gum tissue and tooth enamel.
If you notice increased tooth sensitivity, pain, or chewing problems, it may be an indication that your diet is affecting your teeth positioning. Gum disease, caused by poor diet and oral hygiene, can also lead to gum recession, abscess, and tooth loss, impacting teeth positioning.











































