Fillings

Dental fillings repair teeth that have been damaged by decay or minor fractures. The damaged portion of the tooth is removed and replaced with a restorative material to help restore the tooth’s shape, strength, and function.

What Is a Dental Filling?

dental filling example

A dental filling is a restoration used to repair a relatively small area of damage within a tooth.

Fillings are most commonly used to treat cavities caused by tooth decay. They may also be used in certain situations to repair chipped, worn, or otherwise damaged areas of a tooth.

During treatment, the damaged or decayed tooth structure is removed and the remaining space is restored with filling material. The restoration is shaped to fit the tooth and adjusted so it works comfortably with your bite.

How Do Cavities Develop?

Cavities develop when acids produced by bacteria in dental plaque gradually break down the hard outer layers of a tooth.

In the early stages, tooth decay may not cause any noticeable symptoms. As the cavity becomes larger, you may begin experiencing sensitivity, discomfort when biting, or pain when consuming sweet, hot, or cold foods and drinks.

Regular dental examinations can help identify decay before it becomes large enough to cause significant symptoms.

Once a physical cavity has formed in the tooth, the damaged area generally needs to be restored rather than simply cleaned away.

How Do You Know if You Need a Filling?

Not every cavity hurts, which is one reason routine dental examinations are important.

Possible signs of tooth decay or damage include:

  • Sensitivity to hot, cold, or sweet foods
  • Toothache or localized discomfort
  • Pain when biting or chewing
  • A visible hole or dark area in a tooth
  • Food repeatedly becoming trapped in the same area
  • A chipped or damaged tooth
  • A rough or broken existing filling

These symptoms do not always mean you need a filling. Your dentist may use a clinical examination and dental X-rays to determine what is causing the problem and how much tooth structure has been affected.

What Happens When You Get a Dental Filling?

The treatment area is typically numbed with local anesthetic before the filling procedure begins.

Your dentist removes the decayed or damaged portion of the tooth while preserving as much healthy tooth structure as possible. The area is then prepared for the restorative material.

The filling material is placed, shaped, and finished so it fits the tooth. Your bite is checked afterward, and the restoration can be adjusted if it feels too high when you close your teeth together.

Many fillings can be completed during a single appointment.

What Types of Dental Fillings Are Available?

Several materials can be used to restore teeth. The appropriate choice depends on factors such as the location and size of the filling, biting forces, appearance, existing dental work, and the needs of the individual tooth.

Composite Fillings

Composite resin is a tooth-coloured restorative material that can be matched to the surrounding tooth.

It is commonly used because it provides a natural-looking result and can be bonded directly to tooth structure. Composite may be used on both front and back teeth depending on the clinical situation.

Other Filling Materials

Other restorative materials may also be used depending on the tooth and treatment requirements.

Your dentist can explain which materials are available and why one option may be better suited to a particular tooth.

What Should You Expect After a Filling?

Your mouth may remain numb for a period after treatment if local anesthetic was used. Take care when eating or drinking until normal sensation has returned.

Some teeth experience temporary sensitivity after a filling, particularly to temperature or pressure. This often improves as the tooth settles after treatment.

If your bite feels uneven, the filling feels too high, or sensitivity or discomfort persists or worsens, contact your dental office. A filling may occasionally require an adjustment after it has been placed.

How Long Do Dental Fillings Last?

Fillings are designed to withstand everyday biting and chewing, but they do not last indefinitely.

Their lifespan depends on the filling material, the size and location of the restoration, your bite, oral hygiene, diet, and habits such as clenching or grinding.

Over time, a filling can wear, chip, crack, or develop a gap around its edges. Decay can also develop in the natural tooth structure surrounding an existing filling.

Regular dental examinations allow your dentist to monitor older restorations and identify signs that a filling may need repair or replacement.

Filling, Crown, or Another Treatment?

A filling works best when there is enough healthy tooth structure remaining to support the restoration.

If a tooth has extensive decay, a large fracture, or significant structural damage, a filling may not provide enough protection. A dental crown or another restorative treatment may be recommended instead.

If decay reaches the dental pulp inside the tooth, additional treatment such as root canal therapy may also be necessary.

The appropriate treatment depends on how much of the tooth has been affected and whether the remaining structure can be predictably restored.

Repair Decay Before It Becomes a Larger Problem

Small areas of tooth decay are generally easier to restore than teeth that have experienced extensive structural damage.

If you have tooth sensitivity, discomfort, a damaged filling, or have been told you have a cavity, contact our dental team for an assessment. Treating decay at an appropriate stage can help preserve more of your natural tooth structure.

FAQs About Fillings

Local anesthetic is commonly used to numb the tooth and surrounding area during treatment. You may notice pressure or vibration during the procedure, and some temporary sensitivity can occur afterward.

Many dental fillings can be completed during a single appointment. The amount of time required depends on the size and location of the cavity, the number of teeth being treated, and the restorative material being used.

Yes. A filling itself cannot develop tooth decay, but the natural tooth around its edges can. Daily brushing and flossing, a balanced diet, and regular dental care remain important after a tooth has been restored.

Not simply because they reach a certain age. A filling may need to be replaced if it becomes worn, cracked, loose, develops problems around its edges, or can no longer adequately restore the tooth. Your dentist can monitor existing fillings during routine examinations.

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