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Dental Fillings: What to Expect and Material Choices

February 17, 2025

Welcome to our dental health blog, where we provide expert advice on dental treatments and help you understand your options for maintaining a healthy smile.

Introduction

If you’ve ever had a cavity or tooth damage, you’re likely familiar with dental fillings. Dental fillings are a common restorative treatment used to repair tooth decay, cracks, or fractures, helping to restore the tooth’s shape, function, and strength. Whether it’s your first filling or you’re considering replacing an old one, understanding what to expect during the procedure and learning about the different materials available can help you make informed decisions about your oral health.

In this blog, we’ll explain the process of getting a dental filling, explore the different types of filling materials, and provide tips for maintaining your dental work long-term.

What Is a Dental Filling?

A dental filling is a procedure used to restore a tooth that has been damaged by decay, wear, or minor fractures. The purpose of a filling is to remove the decayed portion of the tooth and fill the space with a material that helps restore the tooth’s normal function and prevent further decay. Fillings can also be used to repair cracked or worn-down teeth caused by habits like tooth grinding (bruxism) or nail-biting.

When Is a Dental Filling Needed?

Fillings are most commonly used to treat cavities (tooth decay), but they can also be used in several other situations. Here are some common reasons you may need a dental filling:

  • Cavities: When bacteria in your mouth produce acids that erode your enamel, cavities (holes) can form. These need to be filled to prevent further decay.
  • Cracked or Broken Teeth: Fillings can be used to repair minor cracks or chips in your teeth, restoring their appearance and function.
  • Worn Teeth: Teeth that have been worn down by grinding or erosion may require a filling to restore their shape and strength.
  • Tooth Sensitivity: Sometimes, dental fillings are recommended for teeth that have become sensitive due to enamel loss or minor damage.

If you’re experiencing tooth pain, sensitivity, or notice a visible hole or crack, it’s important to see your dentist to assess whether a filling is needed.

What to Expect During the Filling Procedure

The dental filling procedure is relatively straightforward and is typically completed in one visit. Here’s what you can expect when you go in for a filling:

1. Numbing the Area

Before the procedure begins, your dentist will apply a local anaesthetic to numb the area around the affected tooth. This ensures that you won’t feel any pain or discomfort during the procedure. If you feel anxious, your dentist may offer sedation options to help you relax.

2. Removing Decay

Once the area is numb, your dentist will use a dental drill or laser to remove the decayed or damaged portion of the tooth. The goal is to clean out all of the decay and prepare the area for the filling.

3. Cleaning the Tooth

After removing the decay, your dentist will clean the cavity or damaged area to remove any remaining debris or bacteria. This ensures that the tooth is free of infection before the filling is placed.

4. Placing the Filling

Once the tooth is cleaned, your dentist will apply the chosen filling material to the cavity. If you’re receiving a tooth-coloured filling (composite resin), the material will be applied in layers and hardened using a special curing light. For metal or ceramic fillings, the material will be placed and shaped to fit the natural contours of your tooth.

5. Shaping and Polishing

After the filling is in place, your dentist will shape it to match your bite and ensure it feels comfortable. The final step is to polish the filling to smooth out the surface and make it blend seamlessly with the rest of your tooth.

Material Choices for Dental Fillings

One of the most important decisions you’ll make when getting a dental filling is choosing the material. Different materials offer varying benefits, and the best choice for you will depend on factors like the location of the filling, durability, appearance, and cost. Here are the most common materials used for dental fillings:

1. Composite Resin (Tooth-Coloured Fillings)

Composite resin fillings are a popular choice because they match the natural colour of your teeth, making them ideal for visible areas like the front teeth. Composite fillings are made from a mixture of plastic and fine glass particles and are applied in layers, then hardened with a curing light.

  • Advantages: Natural appearance, bonds directly to the tooth, versatile (can be used for small and medium cavities).
  • Disadvantages: Less durable than other materials, may need to be replaced after several years, more expensive than amalgam fillings.
  • Best For: Front teeth or visible areas of the mouth where appearance is a priority.

2. Amalgam (Silver Fillings)

Amalgam fillings, also known as silver fillings, are made from a mixture of metals, including silver, mercury, tin, and copper. Amalgam has been used for decades and is known for its strength and durability.

  • Advantages: Long-lasting (can last up to 15 years or more), durable and able to withstand chewing forces, cost-effective.
  • Disadvantages: Silver appearance is more noticeable, may expand and contract over time, potentially causing cracks in the tooth.
  • Best For: Back teeth (molars) where strength is needed and appearance is less of a concern.

3. Gold Fillings

Gold fillings (inlays and onlays) are custom-made in a dental lab and are then cemented into place. Gold is extremely durable and resistant to corrosion, making it an excellent choice for long-lasting restorations.

  • Advantages: Extremely durable (can last 20 years or more), won’t tarnish, ideal for patients who grind their teeth.
  • Disadvantages: High cost, more noticeable than tooth-coloured fillings, requires multiple visits to place.
  • Best For: Molars or back teeth where durability is essential.

4. Ceramic Fillings (Porcelain)

Ceramic fillings are made from porcelain and are a highly aesthetic option for those looking to match the natural colour of their teeth. They are custom-made in a dental lab and then bonded to the tooth.

  • Advantages: Excellent aesthetic appearance, resistant to staining, durable and long-lasting.
  • Disadvantages: More expensive than composite and amalgam, may require more of the tooth to be removed for placement.
  • Best For: Front teeth or visible areas where aesthetics are important, but also suitable for larger fillings.

5. Glass Ionomer Fillings

Glass ionomer fillings are made from a blend of acrylic and glass powder. These fillings release fluoride, which helps protect the tooth from further decay, making them an ideal choice for children or patients at high risk of cavities.

  • Advantages: Releases fluoride to help protect against further decay, bonds directly to the tooth, less expensive.
  • Disadvantages: Not as durable or aesthetically pleasing as composite or porcelain, typically used for small fillings.
  • Best For: Small cavities, areas not exposed to heavy chewing forces, or primary (baby) teeth in children.

Caring for Your Dental Fillings

After getting a dental filling, it’s important to care for your teeth properly to ensure the filling lasts as long as possible. Here are some tips for maintaining your fillings:

1. Maintain Good Oral Hygiene

Continue to brush your teeth twice a day with fluoride toothpaste and floss daily to remove plaque and food particles from around the filling. Good oral hygiene is essential for preventing future cavities and keeping your fillings in good condition.

2. Avoid Hard or Sticky Foods

Hard or sticky foods can damage or loosen fillings, particularly composite or amalgam fillings. Avoid biting down on hard items like ice or hard candies, and be cautious with sticky foods like chewing gum or caramel.

3. Regular Dental Check-Ups

Visit your dentist regularly for check-ups and cleanings. Your dentist will monitor your fillings to ensure they are still intact and functioning properly. Regular dental visits also allow your dentist to catch any issues early before they worsen.

4. Address Tooth Grinding (Bruxism)

If you grind your teeth at night, it’s important to wear a nightguard to protect your fillings from excessive wear. Grinding can cause fillings to crack or loosen over time.

Frequently Asked Questions

Q1: How long do dental fillings last?

A: The lifespan of a dental filling depends on the material used and how well you care for your teeth. Composite fillings typically last 5-10 years, while amalgam fillings can last 10-15 years or longer. Gold and ceramic fillings can last even longer, sometimes up to 20 years.

Q2: Does getting a dental filling hurt?

A: The filling procedure is usually painless, as your dentist will numb the area with a local anaesthetic. You may feel some pressure or mild discomfort during the procedure, but most patients don’t experience pain.

Q3: How do I know if I need a new filling?

A: If you notice symptoms like tooth sensitivity, pain, or a rough or cracked feeling in the tooth, it may be time to replace a filling. Regular dental check-ups will also help your dentist identify when a filling needs to be repaired or replaced.

Conclusion

Dental fillings are a common and effective solution for treating cavities and restoring damaged teeth. With a variety of materials to choose from—each offering its own benefits—your dentist can help you select the best option based on your needs, the location of the filling, and your budget. By maintaining good oral hygiene and attending regular dental visits, you can ensure that your fillings remain strong and functional for many years to come.

Next Steps

If you think you may need a dental filling or want to discuss the best material for your needs, schedule an appointment with your dentist. They can assess your oral health and provide personalised recommendations for restoring your smile.

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