When you need a cavity repaired or an old filling replaced, one of the first questions you may have is whether tooth-coloured fillings or silver fillings are better. Both materials have been used successfully in dentistry, but they are different in appearance, structure, and how they bond to the tooth.
At Wychwood Dental on St. Clair Avenue West, the goal is always to restore teeth in a way that supports long-term health, comfort, and a natural-looking smile. If you are comparing filling options, here is what you should know.
What are tooth-coloured fillings?
Tooth-coloured fillings, often called composite resin fillings, are made from a blend of resin and fine glass-like particles. They are carefully matched to the shade of your natural teeth, which makes them a popular choice for visible areas of the smile.
These fillings bond directly to the tooth. That bond can help support the remaining tooth structure and often allows the dentist to remove less healthy enamel compared with older filling techniques. For many patients, bonded dental fillings are a practical and attractive way to repair cavities, small chips, worn edges, or old silver fillings that no longer look or feel right.
What are silver fillings?
Silver fillings, also known as dental amalgam fillings, are made from a mixture of metals. They have been used for many years because they are strong and durable, especially on back teeth that handle heavy chewing forces.
However, silver fillings are more noticeable than tooth-coloured fillings. They can also expand and contract with temperature changes over time, which may contribute to cracks in the surrounding tooth structure in some cases. Older silver fillings may also develop gaps at the edges, allowing bacteria to collect underneath.
Appearance: tooth-coloured fillings look more natural
The biggest difference for many patients is appearance. Tooth-coloured fillings are designed to blend in with surrounding enamel. This makes them especially helpful for front teeth, premolars, and any area that shows when you smile or speak.
Silver fillings are visible when you laugh, talk, or open wide. Some patients do not mind this, especially for back teeth. Others prefer a more natural appearance and choose composite fillings when replacing older restorations.
If your goal is a seamless smile, tooth-coloured fillings usually offer the more cosmetic result.
Strength and durability: both can work well
Silver fillings are known for strength, but modern tooth-coloured fillings have improved significantly. Today’s composite materials are durable enough for many back teeth and everyday chewing. The best option depends on the size of the cavity, the location of the tooth, your bite, and whether you grind or clench at night.
For smaller and moderate cavities, tooth-coloured fillings often work very well. For larger areas of damage, a filling may not provide enough support. In those cases, your dentist may recommend a stronger restoration such as porcelain inlays or onlays or same day dental crowns.
Tooth preservation: composite fillings can be more conservative
Tooth-coloured fillings bond to the tooth, which can allow for a more conservative repair. That means the dentist may be able to remove only the decayed or damaged portion and preserve more healthy structure.
Silver fillings do not bond in the same way. They rely more on the shape of the prepared tooth to stay in place. This sometimes requires removing additional tooth structure to create retention.
Preserving natural tooth structure matters because the more healthy tooth you keep, the stronger the tooth may remain over time.
Sensitivity after fillings
Some sensitivity after a filling can be normal, especially to cold. It often improves within a few days or weeks. Tooth-coloured fillings can occasionally cause temporary sensitivity if the cavity was deep or if the bite needs adjustment.
Silver fillings can also cause sensitivity, especially because metal conducts temperature more than composite resin. If a tooth remains sensitive, hurts when biting, or feels like it hits first, it should be checked.
A quick bite adjustment or follow-up exam can often solve the issue.
Replacing old silver fillings
Not every silver filling needs to be replaced. If it is stable, sealed, and the tooth is healthy, your dentist may simply monitor it during routine cleanings and exams.
Replacement may be recommended if the filling is cracked, loose, leaking, causing sensitivity, or surrounded by new decay. Some patients also choose replacement for cosmetic reasons.
During your exam, your dentist can assess the filling, take digital X-rays if needed, and explain whether replacement is necessary or optional.
Which filling is better for children?
For children, the right filling depends on the tooth, the size of the cavity, and how long the tooth needs to last. Tooth-coloured fillings are often preferred because they are natural-looking and conservative. In some cases, different materials may be recommended for baby teeth depending on the child’s age and cavity risk.
If your child needs a cavity treated, Wychwood Dental’s paediatric dentistry approach focuses on comfort, prevention, and choosing the most appropriate treatment for the child’s needs.
Cost considerations
Tooth-coloured fillings can sometimes cost more than silver fillings because they require careful shade matching, layering, bonding, and polishing. Many dental benefit plans cover fillings, but coverage may depend on the tooth location and the material used.
Before treatment, ask for an estimate. The team can help explain your options and what your plan may cover.
How to make fillings last longer
No filling lasts forever, but daily care makes a big difference.
Brush twice a day with fluoride toothpaste. Floss daily, especially around filled teeth. Avoid chewing ice, pens, or hard candy. If you grind your teeth, ask about a custom nightguard. Keep regular dental visits so small cracks, gaps, or early decay can be caught before the filling fails.
If you notice rough edges, sensitivity, food catching, or a filling that feels loose, book a dental visit.
So, what works best?
For many patients, tooth-coloured fillings are the preferred choice because they look natural, bond to the tooth, and preserve healthy structure. Silver fillings can still be strong, especially for certain back teeth, but they are more visible and may not suit patients looking for a cosmetic result.
The best filling is the one that fits your tooth, your bite, your oral health, and your goals. A small cavity may be ideal for a tooth-coloured filling. A large, weakened tooth may need an inlay, onlay, or crown instead.
Restore Your Smile at Wychwood Dental
If you have a cavity, an old silver filling, or a tooth that feels sensitive, Wychwood Dental can help you choose the right restoration. Our team offers natural-looking fillings, restorative care, and same-day crown options for teeth that need extra strength. Call 416-653-6004 or email info@wychwooddental.com to book an appointment at Wychwood Dental on St. Clair Avenue West today.
Frequently Asked Questions
Are tooth-coloured fillings as strong as silver fillings?
Modern tooth-coloured fillings are strong and work well for many cavities, including some back teeth. Very large restorations may need an onlay or crown.
Do silver fillings need to be replaced?
Not always. If a silver filling is healthy and sealed, it can be monitored. Replacement may be needed if it cracks, leaks, loosens, or has decay around it.
Do tooth-coloured fillings stain?
They can stain over time, especially with coffee, tea, red wine, or smoking. Good hygiene and regular polishing help keep them looking clean.
How long do tooth-coloured fillings last?
With proper care, they can last many years. Their lifespan depends on size, location, bite pressure, hygiene, and grinding habits.
Can I replace silver fillings with tooth-coloured fillings?
Yes, in many cases. Your dentist will first check the tooth to make sure a filling is enough support. If the tooth is weak, a crown or onlay may be recommended.