Understanding dental fillings: What the treatment may involve

Medical

Hearing you need a filling is common enough that the details often go unexplained during a routine appointment — what’s actually being removed, what’s it being replaced with, and what should you expect afterward? A tooth filling is one of the more accessible parts of general treatments, and understanding what it involves can make the whole process feel less like a mystery.

Why a Filling May Be Needed

A filling is generally used to treat decay that has affected a tooth, restoring the area after the decayed portion has been removed. Decay develops when acid produced by bacteria in plaque gradually breaks down tooth enamel, and if caught before it reaches the tooth’s inner pulp, a filling is generally a sufficient, conservative treatment.

Fillings may also be used to repair minor chips or wear, or to replace an ageing filling that’s developed small gaps or cracks over time.

Common Filling Materials

Composite resin — A tooth-coloured material that bonds directly to the tooth, generally the most common choice for visible teeth due to its natural appearance.

Amalgam — A silver-coloured metal alloy, historically common for back teeth due to its durability, used less frequently in many practices now, partly due to aesthetic preference for tooth-coloured alternatives.

Glass ionomer — Sometimes used for children’s teeth or areas below the gum line, partly due to its ability to release fluoride, though generally considered less durable than composite or amalgam for larger restorations.

Ceramic or porcelain — Used for larger restorations, generally fabricated outside the mouth and bonded in during a separate appointment, offering good aesthetics and durability.

Which material is appropriate depends on the size and location of the decay, aesthetic considerations, and your dentist’s clinical judgement.

What the Filling Procedure Generally Involves

1. Local anaesthetic — Typically administered to numb the area
2. Removing decay — The decayed portion of the tooth is removed using a dental drill or, in some practices, alternative methods
3. Cleaning the area — The cavity is cleaned to remove bacteria and debris
4. Placing the filling — The chosen material is applied and shaped, then hardened, often using a curing light for composite materials
5. Shaping and polishing — The filling is shaped to match your natural bite

Most straightforward fillings are completed in a single appointment, generally taking between 20 minutes to an hour depending on size and number of fillings involved.

What to Expect After Treatment

Numbness from local anaesthetic generally wears off within a few hours. Some mild sensitivity to hot, cold, or pressure is common in the days following treatment, generally settling on its own. If your bite feels distinctly uneven, or if sensitivity persists beyond a week or two, it’s worth having this checked by your dentist rather than assuming it will resolve on its own.

Caring for a Filled Tooth

Filled teeth generally don’t require dramatically different care from natural teeth, though a few things are worth keeping in mind:

• Continue regular brushing and flossing, since the margins where the filling meets natural tooth remain susceptible to further decay
• Avoid using teeth to open packaging or bite unusually hard objects
• Attend regular check-ups, allowing your dentist to monitor the filling over time

Fillings are generally durable but not permanent — they may eventually wear or need replacement depending on factors like bite forces and oral hygiene, and individual longevity varies.

When a Filling Isn’t Enough

If decay has progressed significantly, or if a tooth has limited remaining healthy structure, your dentist may recommend a different approach, such as a crown or, if the pulp is affected, root canal therapy. This is determined through clinical examination and imaging, rather than assumed based on symptoms alone.

Getting Assessed

If you’re experiencing tooth sensitivity, visible decay, or simply haven’t had a check-up in a while, an assessment can determine whether a filling is the appropriate treatment for your specific situation.

Only a clinical examination by an AHPRA-registered dental practitioner can determine the appropriate treatment for a decayed or damaged tooth.

About the Author This article was prepared in collaboration with the clinical team at Hello Dental, offering dental filling treatments using a range of materials suited to individual needs. Treatment recommendations should be confirmed by an AHPRA-registered dental practitioner following a clinical assessment.