Over 30 years of experience
Forest Hills, Queens
112-03 Queens Blvd, Suite 211, NY 11375
A cavity under a filling — also known as recurrent decay — forms when bacteria get beneath an existing restoration and break down the tooth structure underneath. At Madison Dental Art, Dr. Alexander Chao and our team have been detecting and treating these hidden cavities for over 30 years. We use digital X-rays to catch the problem early, before it becomes a root canal.
A cavity under a filling—also known as recurrent decay—occurs when new tooth decay forms around or beneath an existing dental filling. Fillings are not permanent and may eventually break down, allowing bacteria to sneak in and begin deteriorating the tooth structure again. Left untreated, this decay can spread deeper, eventually requiring more invasive procedures like root canals or extractions.
Yes. Fillings aren’t permanent — the seal deteriorates over time, letting bacteria in underneath. Common contributors include:
Recurrent decay is often painless at first. Watch for these warning signs:
We always diagnose before we treat. At Madison Dental Art, Dr. Chao uses:
Treatment depends on how far the decay has progressed:
When recurrent decay goes untreated, it can reach the pulp and cause an abscess. If you’re experiencing throbbing pain, swelling, or fever alongside tooth sensitivity, call us the same day — a tooth infection won’t resolve on its own.
Most fillings don’t last forever. General lifespan by material:
We check your existing restorations at every visit.
Most patients return to normal activities the same day:
Visit us at 112-03 Queens Boulevard, Suite 211 — conveniently located in the heart of Forest Hills.
112-03 Queens Boulevard, Suite 211, Forest Hills, NY 11375
VIEW ON GOOGLE MAPS Posted on Mary WalkerTrustindex verifies that the original source of the review is Google. The Service is excellent. No waiting to be seen. Appointments are on target. The Staff give them all anA++. Try Madison Dental you just might like them. The best!!!Posted on KN wigginsTrustindex verifies that the original source of the review is Google. Not only is DDS Chao wonderful and patience but so is the entire staff. It's always a pleasant experience.Posted on Valerie CantyTrustindex verifies that the original source of the review is Google. I love my dentist. They are caring, patient however I was disappointed in the no communication given regarding my procedure and extras. Otherwise I'm sure they deserve another chance since I've been going for so many yearsPosted on Rosalie BernsteinTrustindex verifies that the original source of the review is Google. Waiting area is modern and immaculate. Staff is very friendly. Most importantly Dr Chao is wonderful. He is gentle, kind, positive and very competent. He put me at ease and efficiently and effectively did the necessary exam and cleaning. I was very pleased with my first visitPosted on Andy WooTrustindex verifies that the original source of the review is Google. Emergency Swollen gums visit. The infection was relieved promptly. Excellent service & friendly staff.Posted on JNK TTrustindex verifies that the original source of the review is Google. Best dentist, clean and gentle. I wouldn't trust anyone else.Posted on Enrique GuzmanTrustindex verifies that the original source of the review is Google. Dr. Zheng does great quality work. Good attention to patient needs. The facilities are clean and orderly.Posted on lisa kushnickTrustindex verifies that the original source of the review is Google. I can’t say enough about Madison Dental Art. Dr.Chao is the best dentist I have gone to by far. He’s very patient and understanding when it comes to my fear of the dentist. He’s very gentle and never rushes a procedure. He tells me what he’s doing before doing anything. The front staff is very welcoming and friendly they make you feel like they know you forever. They also send you reminders about your up coming appointments. I wouldn’t go any place else!
1. Could a cavity be hiding under my filling causing pain?
Yes — recurrent decay often develops without symptoms. An X-ray is the only reliable way to confirm it.
2. How can I tell if my filling is covering a cavity?
Watch for new sensitivity, a rough feeling on the filling, or pain when biting. Any of these warrant a visit.
3. Can a cavity under a filling spread without me noticing?
Absolutely. Early recurrent decay is painless — by the time symptoms appear, it may already be significant.
4. Is it dangerous to leave a cavity under a filling untreated?
Yes. It can progress to the pulp, requiring a root canal, or cause an infection that may lead to extraction.
5. What’s the difference between recurrent decay and a new cavity?
Recurrent decay forms at the margin of an existing filling. A new cavity forms on a previously untreated surface.
5. How long does replacing a filling take?
Most straightforward cases take 30–60 minutes at our Forest Hills office..