One of the most common dental issues, cavities affect millions worldwide. Bacteria and acid cause small tooth holes. Cavities can cause pain, infection, and tooth loss if untreated. Luckily, fillings can prevent and treat cavities. Fillings restore tooth function and appearance by filling cavities. Different fillings have pros and cons. This article discusses cavity causes and prevention, amalgam and composite fillings, inlays and onlays, and filling maintenance.
Decoding Cavities: Causes and Prevention
Dental cavities are caused by bacteria, food, and saliva. Natural mouth bacteria feed on sugars and starches in food and drinks. Carbohydrate digestion produces acids that erode tooth enamel. Cavities can result from demineralization. Saliva neutralizes acids and remineralizes enamel, but if the balance is off, the enamel can lose more minerals than it gains. Decaying teeth can result.
Prevention of cavities is best achieved through good oral hygiene and diet. Tips to follow:
Brush twice daily with fluoride toothpaste. Mineral fluoride strengthens enamel and makes it acid-resistant. Brush all surfaces of your teeth with a soft toothbrush and a gentle circular motion. Replace your toothbrush every 3–4 months or when bristles fray.
A daily flossing removes plaque and food particles from between your teeth and under your gum line. Move the floss gently up-and-down and around each tooth. Use fresh floss for each tooth and avoid snapping or forcing it to avoid gum damage.
After brushing and flossing, rinse with antibacterial or fluoride mouthwash. This kills bacteria, reduces inflammation, and boosts fluoride. Avoid alcohol-based mouthwashes, which dry and irritate gums.
See your dentist regularly for cleanings and exams. The dentist will check your teeth and gums for cavities and other issues. Your dentist will also remove plaque and tartar from your teeth and gums. To prevent tooth decay and erosion, your dentist may recommend fluoride, sealants, or other measures.
Limit sugar and starch in a balanced diet. Sugar and starch feed bacteria and increase mouth acid. Limit sugary and starchy foods like candy, cookies, cakes, soda, juice, and bread. If you eat them, brush and floss afterwards. Drinking water keeps your mouth hydrated and removes food and bacteria.
After meals and snacks, chew sugar-free gum or mints. This increases salivation and neutralizes mouth acids. Find products with xylitol, a natural sweetener that inhibits bacteria and plaque.
The Lowdown on Amalgam Fillings
One of the oldest and most popular fillings is amalgam. Their composition includes silver, tin, copper, and mercury. Large cavities and back teeth are often filled with amalgam fillings because they are strong, durable, and affordable. However, amalgam fillings have drawbacks like:
Cosmetic issues: Silver amalgam fillings can contrast with natural teeth. They can darken and stain teeth and gums. Some people find amalgam fillings unsightly, especially when they smile or laugh.
Amalgam fillings conduct heat and cold better than other fillings, causing sensitivity or discomfort in some people. This is especially true for new fillings or teeth exposed to extreme temperatures like hot or cold foods and drinks.
Health issues: Mercury in amalgam fillings can be harmful if it leaks or vaporizes. Mercury accumulation can affect the nervous, digestive, and immune systems. Some people are allergic to mercury or other metals in amalgam fillings, causing mouth itching, burning, or swelling. When disposed of or cremated, amalgam fillings release mercury into the air, water, and soil, causing environmental concerns.
Composite Fillings: Aesthetic and Functional Advantages
Composite fillings are also common. Resin-based, they match natural teeth color. Composite fillings are better for small to medium cavities and front teeth than amalgam fillings because they are more discreet. Composite fillings also offer functional benefits:
Bonding ability: Composite fillings bond directly to tooth structure, sealing out bacteria and leakage. Since less drilling is needed to prepare the tooth for the filling, this can help preserve more tooth structure. Composite fillings increase tooth strength and prevent cracks.
Versatility: Composite fillings can repair cavities, chips, cracks, and wear. They can also improve tooth appearance and function by changing shape, size, or color.
Durability: Composite fillings resist corrosion and temperature changes, unlike amalgam. They can also withstand moderate chewing and biting, making them suitable for most mouth areas. Composite fillings are weaker than amalgam fillings and may break more easily, especially in high-pressure areas.
Inlays and Onlays: Custom Solutions for Tooth Restoration
Large or complex cavities or tooth damage are repaired with inlays and onlays. They are called indirect fillings because they are custom-made in a dental lab and cemented to the tooth. Inlays and onlays cover part of the tooth, like crowns. Inlays and onlays can be porcelain, gold, or composite resin. Inlays and onlays have advantages over other fillings, including:
Appearance: Inlays and onlays can match the color and shape of natural teeth for a natural look. They’re stain- and discolor-resistant, unlike composite fillings. Porcelain inlays and onlays mimic enamel’s light-reflecting properties, improving tooth appearance.
Fit and function: Inlays and onlays fit securely to the tooth, providing a smooth, comfortable surface. They distribute chewing and biting forces evenly and prevent further damage or decay, restoring tooth function and strength. Inlays and onlays improve tooth bite and alignment, preventing jaw pain and headaches.
High-quality materials and techniques make inlays and onlays durable. The material, location, and care determine their lifespan of 10–30 years. They can be easily repaired or replaced if damaged or worn.