What impact does longer trituration time have on amalgam?

The correct answer regarding the impact of longer trituration time on amalgam is that it results in less expansion and more contraction. Trituration refers to the process of mixing the amalgam components – metallic powders (usually silver, tin, copper, and mercury) – to create a homogenous dental material.

When amalgam is triturated for an extended period, it can lead to a more uniform and finer particle distribution, which enhances the physical properties of the material. This more effective amalgamation process reduces the formation of voids and improves the overall density of the amalgam. As a result, the material may experience less expansion due to lesser release of gas or vapor and may actually exhibit a slight contraction as it sets, which can help improve the marginal integrity of the restoration.

The fact that longer trituration can lead to less expansion and potentially more contraction is significant as it influences the effectiveness of the amalgam in minimizing postoperative problems such as sensitivity and leakage around the restoration. A well-mixed amalgam also translates to better mechanical strength and wear resistance, which are critical factors for the longevity of dental restorations.

In contrast, increased expansion could occur with insufficient trituration or improper mixing, leading to potential complications in the fitting and setting of the