Composite Fillings: The Complete Guide to Tooth-Colored Cavity Repair
Author: ID Wellness Dental Editorial Team | Published: 2026-06-02
Composite resin fillings are the modern standard for cavity repair — invisible, mercury-free, and strong enough for most clinical situations. This complete guide covers everything patients need to know about tooth-colored fillings.
Quick Answer: Composite fillings are tooth-colored restorations made from a mixture of glass particles and plastic resin. They are virtually invisible, bond directly to the tooth, and are mercury-free. In Newark, NJ, composite fillings cost $150–$400 per tooth. They last 7–10 years on average and are the preferred filling material for most patients today. Composite fillings are tooth-colored, virtually invisible, and mercury-free They bond chemically to the tooth, requiring less healthy tooth removal than amalgam Modern composite materials are strong enough for most back-tooth applications Composite fillings can also repair chips, cracks, and worn teeth (dental bonding) They cost $150–$400 per tooth in Newark, NJ — most insurance covers 80% after deductible What Are Composite Fillings? Composite resin is a tooth-colored restorative material made from a mixture of fine glass or ceramic particles suspended in a plastic resin matrix. When placed in a cavity and hardened with a blue curing light, composite forms a strong, durable restoration that closely mimics the appearance of natural tooth enamel. Composite fillings were introduced in the 1960s as an aesthetic alternative to amalgam (silver) fillings. Over the past several decades, advances in composite chemistry have dramatically improved their strength, durability, and wear resistance — making them the dominant filling material in modern dentistry. Why Composite Is the Preferred Filling Material Today Natural Appearance Comp
Frequently Asked Questions
How long do composite fillings last?
Composite fillings last 7–10 years on average. With excellent oral hygiene and regular dental checkups, many composite fillings last 15 years or more.
Are composite fillings safe?
Yes — composite resin fillings are FDA-approved and considered safe. They contain no mercury and are biocompatible with oral tissues.
Can composite fillings be used on back teeth?
Yes — modern composite materials are strong enough for most back-tooth applications, including molars. Your dentist will advise if a different material is more appropriate for your specific situation.
How much do composite fillings cost in Newark, NJ?
Composite fillings cost $150–$400 per tooth in Newark, NJ, depending on the number of surfaces involved. Most PPO dental insurance plans cover 80% of filling costs after the deductible.
Should I replace my old silver fillings with composite?
If your amalgam fillings are functioning well, there is no urgent need to replace them. If they are failing, cracked, or have secondary decay, replacing them with composite is both clinically appropriate and aesthetically beneficial. Discuss timing with your dentist.