Introduction

Maintaining optimal oral health goes beyond just brushing and flossing; it involves being mindful of what we consume and how it affects our teeth. Acid erosion and tooth decay are two common dental issues that can wreak havoc on our smiles if left unchecked. Fortunately, with the right knowledge and habits, it's possible to safeguard our teeth from these threats. In this comprehensive guide, we'll delve deeper into effective strategies to protect your teeth from acid erosion and tooth decay.

Understanding acid erosion

Acid erosion is a gradual process that occurs when the protective enamel covering our teeth wears away due to exposure to acidic substances.¹ Acidic substances include any substance with a pH value lower than 5.5 – and although acids are often characterised by a sour or sharp taste/smell, not all acidic beverages have this noticeable ‘acidic’ taste. This means it is important for you to be aware of what foods and beverages are acidic, without relying on physical cues.

Acidic foods and beverages, such as citrus fruits, sodas, certain types of juices, and even some alcoholic beverages, can weaken enamel over time, making teeth more susceptible to damage. Additionally, stomach acid from conditions like acid reflux or frequent vomiting can also contribute to acid erosion, particularly affecting the back teeth.²

It’s worth noting that, just because some foods can cause enamel erosion, doesn’t mean you should never consume these foods or that they are unhealthy – it just means you should be aware of the effect they can have on your tooth enamel. Acidic foods and beverages should be consumed in moderation, and moreover, may influence the time and frequency with which you brush your teeth.

The following list includes foods and beverages which are acidic:

1. Fruit juices and smoothies: may contain natural citric acids
2. Fizzy/soft drinks, including sugar-free options: soft drinks are ‘fizzy’ because they are carbonated, making them acidic regardless of other sugar/acid content
3. Crisps: in addition to salt and vinegar crisps (which contain highly acidic vinegar), starchy foods such as crisps are broken down by bacteria, which release acidic substances
4. Sauces containing vinegar: ketchup, brown sauce, salad dressings and vinaigrettes, mustard
5. Tea and coffee: these drinks contain tannic acids, which can stain your enamel in addition to causing erosion
6. Wine and other alcoholic drinks: all wines are acidic, although their pH values can vary from 2.5 to 4.5; additionally, alcohol can dry out your mouth, preventing saliva from protecting your teeth

It’s important to note that many foods can also damage your enamel in other ways besides acid erosion, e.g. by causing mouth dryness. Dry mouth is caused by a lack of saliva, which is important for protecting your teeth from erosion. In addition to washing away food particles, saliva helps to prevent tooth decay, gum disease, and oral infections.³

Tooth decay: the silent threat

Tooth decay, often referred to as cavities or dental caries, is caused by the interaction between bacteria in the mouth and sugars from food and drinks. When we consume sugary or starchy foods, bacteria in dental plaque convert these carbohydrates into acids, which then attack the enamel of our teeth. If left untreated, tooth decay can progress, leading to pain, infection, and even tooth loss. Poor oral hygiene, a diet high in sugars and carbohydrates, and frequent snacking can increase the risk of developing cavities.

Protective measures

Maintain a balanced diet

Consuming a balanced diet plays a crucial role in protecting your teeth from acid erosion and decay. While it's not realistic to completely avoid acidic foods and beverages, it's important to consume them in moderation and be mindful of their impact on your dental health. Opt for water or milk as your primary beverages and incorporate more tooth-friendly foods such as dairy products, leafy greens, and fibrous fruits and vegetables into your meals. These foods can help neutralise acids and promote saliva production, which aids in remineralizing and strengthening enamel.

Practise proper oral hygiene

Brushing and flossing daily are essential for removing plaque and food particles that can contribute to acid erosion and tooth decay. Use a fluoride toothpaste to strengthen enamel and consider incorporating an alcohol-free mouthwash into your routine for additional protection against bacteria. Don't forget to replace your toothbrush every three to four months to ensure effective cleaning and invest in interdental cleaning aids such as dental floss, interdental brushes, or water flossers to clean between teeth and along the gum line.

Make sure to use a toothbrush which is not too stiff. Although there is a misconception that hard toothbrushes are better for your teeth, they can contribute to the abrasion of enamel and cause your gums to recede if you aren’t careful. You should use a toothbrush of medium stiffness, which is strong enough to remove the build-up of plaque, but which does not cause abrasion and irritation in your mouth. Toothbrushes are often labelled according to how stiff they are, allowing you to make an informed decision.

Finally, certain dentist-recommended toothpastes can aid the process of remineralisation. Look for dentist-recommended toothpaste brands which are specifically designed for enamel protection and repair.

Be mindful of acidic foods and beverages

While it's tempting to indulge in acidic treats like citrus fruits, sodas, and sour candies, it's important to consume them in moderation and take steps to minimise their contact with your teeth. If possible, consume acidic foods and drinks with meals rather than as snacks, as this can help reduce their erosive effects. When enjoying acidic beverages, consider using a straw to minimise contact with your teeth and rinse your mouth with water afterward to help neutralise acids and wash away residual sugars.

You should also avoid brushing your teeth immediately after eating or drinking, especially when you have consumed something acidic. This is because your mouth contains acidic residues which weaken your enamel after you consume something acidic; waiting at least 60 minutes after eating or drinking allows time for your tooth enamel to remineralise before brushing. You should also rinse or drink water after consuming something acidic, to aid the remineralisation process.

Chew sugar-free gum

Chewing sugar-free gum can be beneficial for your dental health, especially after meals or snacks. The act of chewing stimulates saliva production, which helps neutralise acids and wash away food particles, reducing the risk of acid erosion and tooth decay. Look for gum containing xylitol, a sugar substitute that has been shown to inhibit the growth of cavity-causing bacteria and promote remineralization of enamel.⁴ However, it's important to note that chewing gum should not replace regular brushing and flossing but rather complement them as part of a comprehensive oral care routine.³

Visit your dentist regularly

Regular dental check-ups are essential for maintaining good oral health and catching any issues early on. Your dentist can identify signs of acid erosion and tooth decay during routine examinations and provide personalised recommendations to address them. Additionally, professional cleanings performed by a dental hygienist can remove stubborn plaque and tartar buildup, reducing the risk of cavities and gum disease. Aim to schedule dental appointments at least twice a year or as recommended by your dentist based on your individual needs and risk factors.²

Consider protective measures for acid reflux

If you suffer from acid reflux or gastroesophageal reflux disease (GERD), it's important to take steps to manage your condition to minimise its impact on your dental health. Elevating the head of your bed, avoiding trigger foods and beverages (such as caffeine, spicy foods, and acidic foods), and taking prescribed medications as directed by your healthcare provider can help reduce acid reflux episodes and protect your teeth from damage.⁵ Additionally, rinsing your mouth with water or fluoride mouthwash after experiencing reflux symptoms can help neutralise acids and protect your enamel.

Summary

Protecting your teeth from acid erosion and tooth decay requires a proactive approach that encompasses mindful eating habits, proper oral hygiene practices, and regular dental care. By adopting these strategies into your daily routine and seeking professional guidance when needed, you can safeguard your smile and enjoy optimal oral health for years to come.

Key points

• Be mindful of which foods and beverages contain a high acid content, and consume these in moderation
• Never brush your teeth immediately after eating; it’s best to wait at least an hour after eating or drinking, especially if you have consumed something highly acidic
• Use a toothbrush of medium stiffness, to prevent enamel erosion
• Floss your teeth once a day, to prevent the build-up of plaque
• Use a dentist-recommended toothpaste which specifically targets enamel repair, aiding the process of remineralisation
• Use protective measures for acid reflux, avoiding trigger foods and beverages
• Chew sugar-free gum to stimulate saliva production
• Stay hydrated to prevent mouth dryness
• Schedule regular dentist visits to examine your teeth, and attend regular teeth cleanings (usually on a 6-month basis)

Remember, prevention is key, so prioritise your dental health and make informed choices that support a healthy, happy smile.