Does cavity treatment hurt?

Cavity treatment is performed under local anesthesia and is painless. Thanks to modern anesthetics and gentle techniques used at our dental clinic in Brno, you won’t feel any pain during the procedure — at most a slight pressure. Fear of pain is one of the most common reasons why patients postpone visiting the dentist, which unfortunately allows a small dental cavity to spread into deeper layers of the tooth and cause much greater complications.

How cavity treatment works

The entire procedure usually takes 30 to 60 minutes and consists of several steps:

1. Diagnosis — the dentist first evaluates the extent of the cavity visually and with an X-ray. In some cases, treatment under a dental microscope is used, allowing for more precise work and preservation of as much healthy tooth structure as possible.
2. Local anesthesia — the anesthetic numbs the area around the treated tooth. The effect sets in within 2–5 minutes. The injection itself is virtually unnoticeable thanks to ultra-thin needles and a topical numbing gel.
3. Cavity removal — the dentist uses a drill or specialized instruments to remove all decayed tissue. The process is monitored with a caries detector that stains only the decayed areas — so you can be sure no decay remains in the tooth.
4. Filling placement — the cleaned space is filled with a photo-composite material that is cured with a special light. Modern dental fillings are aesthetically pleasing, amalgam-free, and color-matched to your teeth.
5. Bite adjustment — finally, the dentist checks whether the filling interferes with your bite and gently adjusts it if necessary.

Does a cavity hurt on its own?

It depends on the stage of the cavity. An early-stage cavity often causes no pain at all — it only appears as a light or dark spot on the tooth surface. This is exactly why regular preventive check-ups are so important, as the dentist can detect a cavity before it starts causing problems.

As the cavity progresses deeper, you may notice:

• Increased sensitivity to sweet, cold, or hot foods
• Brief sharp pain when biting
• A visible dark spot or hole on the tooth surface
• Bad breath

If the pain occurs spontaneously, is throbbing, or wakes you up at night, it may mean the cavity has already reached the tooth nerve. In such a case, a standard filling is no longer sufficient and endodontic treatment — root canal therapy — is usually necessary.

Tooth pain after treatment — what is normal

After the local anesthesia wears off, the treated tooth may show mild sensitivity for a few days. This is a completely normal reaction, especially if the cavity was deep. The tooth may be sensitive to hot and cold stimuli or react when biting down.

This hypersensitivity should gradually subside within 1–2 weeks. However, if the pain increases, lasts longer than two weeks, or throbbing pain appears, we recommend booking a follow-up appointment. The dentist will check whether the filling was properly placed and whether there is any irritation of the tooth nerve.

A few tips to reduce sensitivity after treatment:

• Avoid extremely cold and hot foods for the first few days
• Don’t chew hard foods on the treated side
• For persistent pain, you can take a standard over-the-counter painkiller
• Maintain gentle but thorough dental hygiene

How much does cavity treatment cost and how to prevent cavities

The cost depends on the extent of the damage and the type of filling chosen. At our clinic, the price for a layered photo-composite filling starts from €60. A preventive examination is covered by health insurance twice a year — this regular check-up is the best investment in healthy teeth, because an early-detected cavity means simpler, faster, and less expensive treatment. You can find a complete overview of prices in our price list.

The most effective way to prevent cavities is a combination of proper home care and professional dental hygiene:

• Brush your teeth twice a day — ideally with fluoride toothpaste and a soft-bristled brush
• Use interdental brushes or floss — cavities most often develop in the spaces between teeth, where a regular toothbrush cannot reach
• Limit sweets and sugary drinks — sugars create the ideal environment for the bacteria that cause cavities
• Attend regular check-ups — at least twice a year; if you are prone to cavities, even more often
• Visit a dental hygienist — professional cleaning removes tartar and plaque from areas that are hard to reach with home care

If you are afraid of pain during treatment or have any concerns, don’t hesitate to contact us. At our clinic in Brno, we specialize in restorative dentistry and treat every patient individually to ensure maximum comfort. An early visit to the dentist is always better than a painful root canal procedure, which an untreated cavity can lead to.