AMALGAM FILLINGS
dental fillings that contain mercury
Dental amalgam fillings are a type of dental filling material that is commonly used to restore teeth that have been affected by tooth decay or damage. These fillings are made up of a mixture of metals, including mercury, silver, tin, and copper. Mercury makes up about 50% of total weight.
Amalgam fillings have been used in dentistry since early 1800s. In recent years, we have seen growing concern about the potential health risks associated with the mercury content in dental amalgam.
When it comes to the removal of dental amalgam fillings, it is important to take certain precautions. The removal process can release mercury vapour, which can be inhaled or absorbed by the body. Therefore, it is crucial to follow proper procedures to minimize any potential exposure.
Some people choose to have their dental amalgam fillings removed due to concerns about the potential health risks associated with mercury. Since each patient, and each filling, is unique, we focus on ensuring a thorough discussion regarding the process, options, benefits and risks for replacing your mercury fillings.
dr. agatha bis
Oakville Dentist, Dr. Agatha Bis, DDS received her Doctor of Dental Surgery degree from University of Western Ontario in 1996. With over 25 years of clinical experience creating beautiful and healthy smiles, Dr. Bis offers a unique approach to dentistry, blending modern dental practices with the use of digital technology to optimize health outcomes.
With thousands of hours in post-graduate training, her unique focus and expertise in treating TMD and providing options in restorative dentistry, along with digital technology has led to helping numerous patients resolve chronic and debilitating dental challenges.
To schedule a consultation, call our office at (905)338-6684 or email at info@smilesbybis.com
options for materials when replacing mercury fillings
There are several restorative materials available as alternatives to amalgam fillings. The choice of material depends on factors such as the location of the tooth, the size of the restoration, aesthetic considerations, para-functional habits like bruxism, or teeth-grinding, and the patient's preferences. Here are some common restorative material options:
1. Composite Resins: mixture of plastic resin and small glass or ceramic particles. This is a great option for small restorations due to its aesthetic appearance, versatility, adhesive bonding, and tooth conservation.
2. Glass Ionomer: composed of a powder (glass) and a liquid (acidic polymer solution).This restorative material is known for its fluoride release, which can be beneficial for preventing tooth decay and strengthening the surrounding tooth structure, especially in caries-prone individuals. For those who choose to avoid fluoride, another material would be considered.
3. Porcelain: dental ceramic, with excellent aesthetic qualities, biocompatibility, and durability. Dentists commonly use porcelain for various dental restorations, including crowns, veneers, inlays, onlays, and bridges. Porcelains are known for their strength and durability. They are also stain-resistant, which helps maintain its aesthetic appearance over time.
Call now to schedule a consultation: (905)338-6684
Precision & Technique
Placing composite resin restorations and designing and bonding porcelain in teeth can be technique-sensitive, meaning that the success of the restoration is influenced by the precision and skill of the dentist. Here are some factors that contribute to the technique sensitivity of placing composite resin:
1. Moisture Control: Composite resins and porcelain are sensitive to moisture during placement. Adequate isolation using rubber dams or other moisture control techniques is essential to prevent saliva or blood contamination, which can compromise the bond between the tooth and the composite material.
2. Adhesive Bonding: Composite resins and porcelain restorations rely on adhesive bonding to the tooth structure for retention. Proper etching, application of bonding agents, and curing are crucial steps in creating a strong bond. Any contamination or improper technique during these steps can affect the bond strength.
3. Layering Technique: Composite resins are often applied in multiple layers, each of which needs proper curing before the next layer is added. The layering technique is critical to achieving the desired shape, colour, and translucency. Inadequate layering or improper curing can lead to weak restorations, sensitivity, and voids.
4. Curing Time and Intensity: Proper curing of composite resin and the adhesive used in bonding porcelain is essential for achieving optimal physical properties. Inadequate curing can result in incomplete polymerization, leading to reduced strength and increased susceptibility to wear. Ensuring the correct curing time and intensity is crucial.
5. Shade Selection: Achieving a natural appearance with composite resin requires careful shade selection. Dentists need to consider factors such as tooth colour, translucency, and the patient's preferences. Skill in colour matching and layering is crucial for esthetic success.
6. Anatomical Form and Contouring: The dentist must skillfully shape and contour the composite resin, and/or design porcelain restoration to match the natural anatomy of the tooth. Proper contouring not only ensures a natural appearance but also influences the function and occlusion of the restored tooth.
7. Finishing and Polishing: The final steps of finishing and polishing are essential for achieving a smooth surface and preventing plaque accumulation. Inadequate finishing or polishing can lead to rough surfaces, which may contribute to staining and bacterial adherence.
8. Postoperative Instructions: Providing patients with proper postoperative instructions, including information on dietary restrictions and oral hygiene practices, is crucial for the long-term success of composite resin & porcelain restorations.
Due to these considerations, it is important for dentists to receive proper training and stay updated on the latest techniques and materials in composite resin placement. Additionally, attention to detail and a commitment to precision are key factors in achieving successful and long-lasting composite resin and porcelain restorations.
mercury ban
Countries across the world are restricting and banning the use of mercury. EU Commission bans the use of amalgam from 2025. FDA finds that certain groups of people are more at risk for harmful effects. Sweden, Norway, and Germany have banned the use of amalgam in dental restorations. Most countries in Africa follow closely.
1996 Health Canada states that:
amalgam fillings should not be placed in pregnant or planning to be pregnant women
amalgam fillings should not be placed in patients with impaired kidney function
amalgam fillings should not be placed in patients with impaired liver function
amalgam fillings should not be placed in primary teeth (children)
when placing or removing amalgam fillings, very specific disposal conditions must be followed including removal and waste disposal
In addition, all dental offices must have and comply with the use and function of an amalgam separator inside the office. Amalgam waste, the mercury remnants remaining from removing mercury amalgam dental fillings cannot be placed in waste, garbage or down the lines. ALL mercury waste must go through separation and proper disposal with an outside company that manages toxic chemicals when it comes to its removal from premises.