Which type of amalgam is best suited for interproximal spaces?

The best choice for interproximal spaces is admixed amalgam. This type combines both spherical and lathe-cut particles, which gives it specific handling properties that make it ideal for use in tight contacts, such as those found between teeth. The unique particle arrangement allows for improved adaptation to the tooth structure, facilitating a better seal and reducing the risk of overhangs when packing the material. Additionally, admixed amalgams offer good strength and resistance to fracture, which are important properties since interproximal areas often experience significant stress during chewing.

Other types of amalgam, such as spherical and low copper amalgams, do not provide the same level of performance in these specific conditions. Spherical amalgams, while they can be easier to manipulate, may not pack as closely in the interproximal areas. High copper amalgams, while improved in corrosion resistance, typically do not offer the same ease of placement and adaptation in tight spaces as admixed amalgams do. Therefore, admixed amalgam is particularly favored for restoring interproximal areas due to its superior combination of adaptability and durability.