This is one of the most common questions in restorative dentistry. Both options have been used to treat cavities and repair damaged teeth. However, modern materials like composite resins have replaced amalgam due to their long-term aesthetic, functional, and health advantages.
At Icon Dental, we help you make an informed decision by evaluating your clinical case, aesthetic needs, and lifestyle. Read on to learn what you need to know about these dental materials and why composite resin has become the preferred option.
Key Differences Between Amalgam and Composite Resin
Composition and appearance
- Amalgam: A metal alloy of mercury, silver, tin, and copper. Its metallic gray color disrupts the natural aesthetics of a smile.
- Composite Resin: A composite material made of acrylic resin and ceramic particles. It mimics the natural color of teeth, providing an inconspicuous and aesthetic appearance.
Durability and strength
- Amalgam was known for its strength in molars; however, over time, it tends to develop microleakage, allowing bacteria to enter and causing recurrent cavities and sensitivity.
- Thanks to technological advancements, modern composite resins have improved their strength, allowing them to be used in molars without compromising durability.
Placement technique
- Composite Resin chemically bonds to the tooth, preserving more of the tooth structure and reducing the risk of fractures.
- In contrast, amalgam is packed into the cavity without adhering to the tooth. This lack of adhesion can lead to microleakage and the weakening of dental tissue over time.
Advantages and Disadvantages of Each Restorative Option
Benefits of composite resin
- High aesthetics: It perfectly imitates the color of the tooth.
- Chemical adhesion: It protects the natural structure and prevents leakage.
- Similar elasticity to the tooth: Reduces serious fractures.
- Biocompatible: Free from mercury and metals.
- Advanced technology: It can withstand the chewing force on molars today.
Limitations of amalgam
- Unattractive metallic appearance.
- It stains teeth and leaves "tattoos" on gums.
- It does not adhere to the tooth, which promotes bacterial micro-leakage and sensitivity.
- It can weaken the tooth, making it more fragile and prone to fractures.
Clinical and economic considerations
Although composite resin may have a higher cost, its aesthetic and functional value makes it the most recommended alternative today. Although cheaper, amalgam is falling out of use in modern dentistry due to its limitations and side effects.
Schedule your consultation with us to discover which restoration is right for you.
When Should You Replace an Amalgam Filling with Composite Resin?
Clinical indications for replacement
- Leakage, fractures, or wear of the amalgam filling.
- Presence of stains or sensitivity in the tooth.
- Need for complementary aesthetic treatments.
Myths about mercury in amalgams
While amalgams do contain mercury, it is in a stable form. However, placing new amalgam fillings is no longer recommended; they are only replaced when the filling shows problems.
Personalized professional evaluation
At Icon Dental, we analyze your current restorations, the condition of your teeth, and your expectations. While not all amalgam fillings require immediate replacement, it is advisable to evaluate their condition and consider more modern options.
How to Know Which Type of Restoration is Right for You
Clinical criteria used by the dentist
- Location and function of the tooth.
- Age and habits of the patient.
- Budget and aesthetic expectations.
Patient expectations and lifestyle
While some prioritize aesthetics and health, others look for strength. Composite Resin balances these needs and is the most widely used option today.
Recommendations from Icon Dental
Composite Resins are currently the standard for dental restorations thanks to their durability and natural appearance. Our team personalizes each treatment to be functional, long-lasting, and harmonious with your smile.
and take the first step toward a healthier, more beautiful smile.
Frequently Asked Questions About Resin and Dental Amalgam
- Which lasts longer, composite resin or amalgam? Amalgam used to be more durable in high-pressure areas, but modern composite resins are equally durable without the drawbacks of metal.
- Can composite resin stain or come loose over time? Poor hygiene can cause staining, but it can be easily polished or repaired.
- Should I replace my amalgam fillings just because they are old? Not necessarily, but it's a good idea to have them checked. If they show signs of leakage or fractures, it is best to replace them with composite resin.
- Is composite resin more expensive than amalgam? Yes, but composite resin offers aesthetics, safety, and biocompatibility, making it an investment in your dental health.
Although amalgam was a widely used material, composite resins have proven to be safer, more aesthetically pleasing, and more functional in modern dentistry.
At Icon Dental, we use our experience and honesty to help you choose the restoration that best suits your smile.
and rediscover your best smile.
Destacado
23 de Septiembre del 2025
Español 
520 841 2576 
06 de Julio del 2023