Amalgam Fillings: The Hidden Culprit Behind Tooth Cracks?

Many of us have or know someone who has amalgam fillings. Also known as “silver fillings,” these have been a mainstay of dental treatments for decades. However, in recent years, the conversation around amalgam fillings has evolved, with some dental professionals and researchers pointing to a potential link between these fillings and cracks in the teeth.

Amalgam fillings are composed of a mix of metals, including silver, tin, copper, and mercury. Their durability and resistance to wear have made them a popular choice in treating cavities for years. However, one often overlooked downside is their inherent thermal expansion.

Due to the metallic nature of the materials used, amalgam fillings expand and contract with temperature changes in the mouth from foods and drinks. Hot coffee, cold ice cream, and everything in between can cause these fluctuations. Over time, this consistent expansion and contraction can exert considerable pressure on the surrounding tooth structure, potentially leading to the formation of cracks.

Although these cracks may be minute initially, repeated stress over years can cause them to grow, leading to significant damage. Larger cracks can compromise the structural integrity of the tooth, making it more susceptible to breakage and requiring more extensive restorative procedures, such as crowns or root canals.

The problem is further exacerbated in cases where the filling is large, taking up a significant part of the tooth. With a greater volume of amalgam, the stresses imparted on the tooth structure are intensified, leading to a higher likelihood of crack development.

Crown placement becomes the common solution in these scenarios. Crowns work by effectively capping the damaged tooth, providing it with structural support while preventing further damage. They function as a protective layer, distributing the biting pressure evenly across the tooth, thereby reducing the stress on any one part.

It is important to note that while the association between amalgam fillings and tooth cracks is compelling, this doesn’t mean that every tooth with an amalgam filling will develop a crack. Other factors such as oral hygiene, diet, and bruxism (tooth grinding) can significantly impact the health and integrity of your teeth.

As dentistry advances, we now have more filling options available that are more tooth-friendly, such as composite resins and porcelain. These materials expand and contract at a rate closer to natural tooth enamel and have the added advantage of being tooth-colored, providing a more aesthetically pleasing outcome.

In conclusion, if you have amalgam fillings, there’s no need for immediate panic. However, regular dental check-ups are essential to spot any potential problems early. If you are getting a new filling, consider discussing with your dentist the pros and cons of all available materials to make an informed decision about your dental health.

Remember, the health of your teeth doesn’t stop at the dentist’s chair. Regular oral hygiene practices, a balanced diet, and awareness about habits such as teeth grinding can go a long way in preserving the health and longevity of your teeth


Contact Platinum Dental for more information about Invisalign and if it is the best option for you.