FIllings

What Are Amalgam Fillings?

Amalgam fillings are silver in colour and made by combining mercury with a silver alloy (typically 50% mercury, 35% silver, and 15% tin, copper, and other metals). They are extremely durable and have been used in dentistry for over 150 years. Amalgam is ideal for back teeth, where strong chewing forces are applied.

These fillings are:

• Long-lasting (15–20 years is common)
• Cost-effective

Before placement, any decay is removed and the cavity is shaped to hold the filling. In cases where the tooth is severely damaged, a small stainless steel pin may be used to help secure the filling.

Are There Any Risks From Amalgam Fillings?

While dental amalgam contains mercury, it is chemically bound within the alloy and considered safe. Extensive scientific research over the past 100+ years has found no reliable evidence linking amalgam fillings to health problems. They remain a widely used and trusted option.

What Are Composite Fillings?

Composite fillings are tooth-coloured and made from a resin base mixed with powdered glass, silica, or ceramic particles. They’re a popular choice for visible areas because they blend in seamlessly with natural teeth.

Key features include:

• Aesthetic, natural appearance
• Bonded directly to the tooth
• Set using a special curing light
• Available in a variety of shades to match your smile

While composite fillings are strong, they may not be quite as hard-wearing as amalgam and can stain over time.

What Are Glass Ionomer Fillings?

Glass ionomer fillings chemically bond to the tooth and gradually release fluoride, which can help prevent further decay. These are generally used for:

• Baby teeth
• Non-biting surfaces (e.g., near the gumline)

They require minimal tooth preparation but are less durable than other options, making them unsuitable for high-pressure areas.

What Are Gold Inlays and Onlays?

Gold inlays and onlays are extremely durable and suitable for most areas of the mouth.

• Inlays fit within the biting surface of the tooth.
• Onlays cover a larger area, sometimes extending over the tooth’s cusps.

Gold fillings are:

• Long-lasting and non-corrosive
• Made in a dental laboratory
• Fixed in place with dental cement after being custom-crafted

This process usually requires two visits, and while more expensive, gold is often considered the most durable material available.

What Are Porcelain Inlays?

Porcelain inlays are both functional and aesthetic. Using advanced CAD/CAM technology, they can often be designed and placed in just one or two visits.

Benefits include:

• Tooth-coloured and highly aesthetic
• Custom-fitted for comfort and durability
• Can be made in-house or in a lab depending on your dentist’s equipment
• Hard-wearing and long-lasting

Like gold inlays, porcelain inlays tend to be more costly due to the materials and technology involved.