What Are Amalgam Fillings
Amalgam fillings, commonly known as silver fillings, are dental restorations made from a combination of metals including mercury, silver, tin, and copper. This mixture creates a strong, durable material that has been used in dentistry for well over a century.
Due to their strength and resistance to wear, amalgam fillings have historically been a commonly chosen option for restoring back teeth (molars and premolars), where significant chewing forces are applied. While tooth-coloured alternatives are now widely available, amalgam remains a recognised restorative material in general dentistry.
When Amalgam Fillings May Be Used
Although many patients now prefer tooth-coloured composite fillings for aesthetic reasons, there are certain clinical situations where amalgam may still be considered as a restorative option.
- Large cavities in back teeth — amalgam can withstand heavy biting pressure, making it a durable choice for larger restorations in molars
- Areas with heavy bite forces — teeth that bear significant load during chewing may benefit from the strength characteristics of amalgam
- Situations where moisture control is difficult — amalgam is less sensitive to moisture during placement compared to composite resin, which requires a dry field for proper bonding
Your dentist will discuss the available filling materials with you and help you understand which option may be most appropriate for your individual situation and preferences.
Replacing Silver Fillings
Amalgam fillings do not last indefinitely and may need to be replaced at some point during their lifespan. There are several reasons why replacement may be considered.
- Wear and deterioration — over time, amalgam fillings can wear down, develop rough edges, or deteriorate at the margins
- Cracking or fracture — older fillings may crack, which can allow bacteria to enter the space between the filling and the tooth
- Leaking — when the seal between the filling and the tooth breaks down, decay may develop underneath
- Cosmetic preference — some patients choose to replace visible amalgam fillings with tooth-coloured alternatives for aesthetic reasons
Replacement of amalgam fillings is generally carried out when there is a clinical indication, such as signs of wear, cracking, or recurrent decay. Composite resin or ceramic materials are commonly used as alternatives when a filling is replaced. Your dentist at our Croydon clinic can assess the condition of your existing fillings during routine check-ups and advise whether any action is needed.
