When a cavity needs to be repaired, one of the first questions patients ask is what the filling will be made of. For decades, silver amalgam was the standard, but tooth-colored composite fillings have become the preferred choice for many people who want a repair that blends in with their natural smile. Both materials can restore a tooth and stop decay from spreading, yet they differ in appearance, the amount of healthy tooth that must be removed, and how they hold up over time. Understanding those differences helps you make a confident decision at your next visit to Infinite Dental Wellness in Glendale, CA.
What Are Silver (Amalgam) Fillings?
Silver fillings, more accurately called amalgam, are made from a blend of metals including silver, tin, copper, and mercury. They have been used for well over a century because they are strong, long-lasting, and inexpensive. Amalgam is especially durable under heavy chewing pressure, which is why it was traditionally placed in back molars. The trade-off is that amalgam is dark and metallic, so it is easy to see when you laugh or open wide, and it does not bond to the tooth the way modern materials do.
Why Some Patients Move Away From Amalgam
Because amalgam contains mercury, some patients feel more comfortable choosing a metal-free alternative. At Infinite Dental Wellness we are a mercury-free practice, meaning we place tooth-colored composite fillings rather than new amalgam. Amalgam also expands and contracts with temperature changes, which over many years can contribute to tiny cracks in the surrounding tooth. In addition, placing amalgam often requires removing slightly more healthy tooth structure to create a pocket that mechanically holds the filling in place.
What Are Tooth-Colored (Composite) Fillings?
Tooth-colored fillings are made from a tooth-shaded composite resin that is matched to the natural color of your enamel. The material is placed in layers and hardened with a curing light, then shaped and polished so the repair virtually disappears. Composite fillings bond directly to the tooth, which helps reinforce the remaining structure and usually allows the dentist to preserve more of your natural tooth. For most people, the biggest draw is simple: no one can tell you have had dental work done. Composite is also versatile, working well for cavities in both front and back teeth and even for small cosmetic touch-ups such as closing a minor gap or repairing a chipped edge.
Because the resin bonds to the tooth, it also adds a measure of insulation and support that loose metal fillings cannot offer. The materials used in modern composite have improved significantly over the years, becoming stronger and more wear-resistant while still looking completely natural. This combination of strength and appearance is why composite has become the go-to choice for everyday cavity repair in most dental practices, including ours.
Key Benefits of Composite Fillings
- Natural appearance that matches your surrounding teeth
- Bonds directly to the tooth for added support
- Conserves more healthy tooth structure
- Mercury-free and metal-free
- Can often be completed in a single visit
Comparing the Two Side by Side
Both filling types can effectively treat a cavity, but each has strengths worth weighing. The right choice depends on the size and location of the cavity, your bite, your budget, and your personal preferences. Here are the main factors to consider:
- Appearance: Composite is tooth-colored and discreet; amalgam is dark and noticeable.
- Durability: Amalgam is extremely strong; modern composites are also durable and continue to improve.
- Tooth preservation: Composite usually requires removing less healthy tooth.
- Bonding: Composite chemically bonds to the tooth; amalgam relies on a mechanical fit.
- Sensitivity: Both may cause brief temperature sensitivity that typically fades.
- Material: Composite is metal-free and mercury-free.
How We Place a Tooth-Colored Filling
The process is comfortable and efficient. After numbing the area, your dentist gently removes the decayed portion of the tooth and cleans the space. The composite resin is then applied in thin layers, each hardened with a special light, and finally sculpted to match the natural contours of your tooth so your bite feels normal. Because composite work is part of our everyday restorative and cosmetic care, the finished result looks seamless. After placement, your dentist will check that your bite feels even and make small adjustments if needed, so the tooth functions just like it did before the cavity formed.
It is normal to experience some brief sensitivity to hot and cold after a new filling, and this usually fades within a few days. If a cavity is very large or the tooth is structurally weak, your dentist may recommend a dental crown instead, which wraps and protects the entire tooth and provides far more support than a filling could on its own. Your dentist will always discuss the most conservative option that will reliably restore the tooth, so you understand exactly why a particular treatment is recommended.
Should You Replace Old Silver Fillings?
An older amalgam filling that is intact and sealed does not necessarily need to be replaced. However, if a silver filling is cracked, leaking, worn down, or contributing to decay, replacing it with a tooth-colored restoration is a great opportunity to upgrade both function and appearance. Many patients choose to swap visible silver fillings for natural-looking composite as part of refreshing their smile, particularly when the filling shows in the corner of the mouth. Your dentist can examine each filling and let you know whether replacement is recommended now or simply something to consider down the road.
There is no need to rush to replace healthy amalgam, but it is worth keeping an eye on older fillings during your regular checkups. Over many years, the seal between an amalgam filling and the tooth can break down, allowing bacteria to slip underneath and cause new decay that is hidden from view. Routine exams and X-rays let your dentist monitor the condition of every filling so any problem is caught early, while the repair is still simple and conservative.
If you have a new cavity or an aging silver filling you would like evaluated, the team at Infinite Dental Wellness is here to help. Drs. Leon Kiraj and Liana Muradyan are USC-trained and proud to maintain a 4.9-star Google rating from more than 300 patient reviews. Call us today at (818) 541-1110 to schedule a visit at our Glendale, CA office and find out which filling option is right for you.