Worrying about pain is one of the most common reasons people put off getting a filling, and it is completely understandable. Whether you have been told you have a cavity or are simply curious about the process, knowing what to expect can make a real difference to how you feel going in.
At St Albans Family Dental, we take a gentle, unhurried approach to every procedure, including our dental fillings, so you feel informed and at ease from the moment you sit down.
Quick Overview
- What it is: A dental filling is a restorative procedure used to repair a tooth damaged by decay, typically completed in a single visit
- Who it may apply to: Anyone with a cavity, cracked tooth, or area of decay may need a filling; how it feels often depends on the depth of the cavity and individual sensitivity
- What it involves: Local anaesthetic is used to numb the area before treatment begins; most patients report pressure as the main sensation, though individual experiences vary
- What influences outcomes: Cavity depth, filling material, and how the tooth responds after treatment can all affect post-procedure comfort in different ways
- What guides next steps: If sensitivity continues beyond a couple of weeks, or worsens rather than improves, it is worth checking back with your dentist
Keep reading to understand what happens at each stage of a dental filling, why some discomfort after treatment is normal, and when it is worth calling your dentist.
Do dental fillings hurt during the procedure?
For most patients, the filling procedure itself is manageable. Local anaesthetic is applied to numb the tooth and the surrounding area before any work begins. Once it takes effect, you may feel some pressure or vibration as the decayed tooth material is removed, though how much you feel can vary from person to person.
Many dentists apply a small amount of numbing gel to the gum before the anaesthetic injection, which helps reduce the pinch of the needle. The injection itself is usually brief. Some patients feel a little anxious about the needle, and that is completely normal; letting your dentist know beforehand means they can take extra care.
Once the area is numb, the tooth is prepared, the filling material is placed in layers, and a special light is used to cure and harden composite resin fillings. Most patients are surprised by how straightforward the experience feels once the anaesthetic is working.
What happens after the anaesthetic wears off?
It is common to notice some sensitivity once the numbing effect fades, especially in the first day or two. This can include mild tenderness when biting or a brief zing when eating cold foods or breathing in cold air.
A 2015 systematic review, published in Dental Materials, found that post-operative sensitivity is a known and well-documented occurrence following composite resin fillings. The review noted that sensitivity is typically manageable and resolves with time, and that the adhesive technique used influences the occurrence of post-operative sensitivity. Cavity depth also plays a role, with deeper restorations generally associated with more noticeable sensitivity during healing.
For shallow to moderate cavities, sensitivity often settles within a few days to a week. For deeper fillings that sit closer to the nerve, it may take two to four weeks before the tooth feels completely settled. This is your tooth adjusting to the new filling material, and it is a normal part of recovery.
Why do some fillings feel more sensitive than others?
Not all fillings feel the same afterwards, and cavity depth is one of the main reasons.
Deeper cavities sit closer to the nerve inside the tooth. The process of cleaning and filling these areas involves more disturbance to the surrounding tissue, which can lead to more noticeable sensitivity as the tooth heals. Tooth decay caught early is generally simpler to treat, which is one of the practical reasons regular dental check-ups matter.
The filling material also plays a role. Composite resin fillings, which are tooth-coloured, bond directly to the tooth and are cured with a special light. St Albans Family Dental uses this type of filling, made from high-quality materials. Some patients notice brief sensitivity to temperature while the bonded material fully settles in.
Individual sensitivity varies too. Patients who already have naturally sensitive teeth may notice more discomfort after a filling than those who do not. This is not unusual, and it is worth mentioning to your dentist before the procedure so they can take that into account.
How to manage mild discomfort after a filling
If you experience sensitivity after your filling, a few simple steps can help keep you comfortable during the healing period.
- Avoid very hot or cold foods and drinks for the first few days, or until sensitivity eases
- Chew on the opposite side of your mouth if one area feels tender
- Avoid hard or sticky foods while the filling is settling in
- Over-the-counter pain relief such as paracetamol or ibuprofen can help with mild discomfort in the first day or two; always follow the dosage instructions
These measures are usually enough to get through the adjustment period comfortably. Most patients find the sensitivity fades on its own without any specific intervention.
What if I am nervous about getting a filling?
Dental anxiety is something the team at St Albans Family Dental understands well. It is something Dr David Nguyen and Dr Huy Nguyen work with regularly, and the practice is set up to help patients feel genuinely comfortable from the moment they arrive.
If you are concerned about pain or have had a difficult experience in the past, say so when you book. Options such as numbing gel before the injection, regular check-ins during the procedure, and going at your own pace can all make a real difference. For patients who need additional support, sedation dentistry is available at the practice.
The most important thing is not to delay treatment. When decay is left untreated, it tends to spread deeper into the tooth over time, which means more involved procedures later.
A Considered Approach to Fillings at St Albans Family Dental
Dental fillings are one of the most routine procedures in dentistry, and with local anaesthetic, most patients find the experience far less uncomfortable than they anticipated. Some sensitivity after treatment is normal, but it is temporary, and it is a sign that the tooth is adjusting to its new restoration.
If you have been putting off a filling or have questions about what is involved, we would be happy to talk it through with you at a consultation or check-up. If you also need to replace a missing tooth, you can discuss professional dental implant care available in St Albans with our team.
Our family dental clinic supporting patients across St Albans is open Monday to Sunday and can be reached on (03) 7003 2089 or at 274 Main Road East, St Albans 3021. Book an appointment online at a time that suits you.
Frequently Asked Questions
Can I eat straight after a dental filling?
It is best to wait until the local anaesthetic has fully worn off before eating, as numbness in your lips and cheek makes it easy to accidentally bite yourself without realising. For composite resin fillings, the material is hardened during the appointment with a curing light, so it is set before you leave. Your dentist may still suggest avoiding very hard or chewy foods on that side for the rest of the day while the area settles.
Will a tooth-coloured filling be noticeable?
Composite resin fillings are matched to the shade of your natural tooth, so they blend in rather than stand out. For most patients, a well-placed filling is not obvious in everyday conversation or when smiling. The degree to which a filling blends in depends on the size of the restoration and its location in the mouth. A filling on a back molar will naturally be less visible than one near the front. Your dentist will match the shade carefully before placing the material.
Note: Any surgical or invasive procedure carries risks. Before proceeding, you should seek a second opinion from an appropriately qualified health practitioner.
References
Reis, A., Dourado Loguercio, A., Schroeder, M., Luque-Martinez, I., Masterson, D. and Cople Maia, L. (2015). ‘Does the adhesive strategy influence the post-operative sensitivity in adult patients with posterior resin composite restorations?: A systematic review and meta-analysis’. Dental Materials, 31(9), September, pp. 1052-1067. Amsterdam: Elsevier/Academy of Dental Materials. https://pubmed.ncbi.nlm.nih.gov/26122377/
Healthdirect Australia. (2025). ‘Tooth decay’. Healthdirect Australia, 2 December. Canberra, ACT: Healthdirect Australia. https://www.healthdirect.gov.au/tooth-decay
Department of Health and Human Services (Victoria). (n.d.). ‘Dental fillings’. Better Health Channel. Melbourne, VIC: Department of Health and Human Services. https://www.betterhealth.vic.gov.au/health/conditionsandtreatments/dental-fillings