After amalgam titrations, the mix should be placed within:
- a- 1 min.
- b- 3 min.
- c- 5 min.
The correct answer is a- 1 min.
Here's a more detailed explanation:
Timeline for amalgam placement:
- Trituration:
The amalgam alloy and mercury are mixed in an amalgamator for a specified time, usually around 5-10 seconds.
- Immediate Condensation:
Immediately after trituration, the amalgam should be condensed into the prepared tooth cavity within 1 minute.
Reasons for prompt placement:
- Working time:
The freshly mixed amalgam has a limited working time before it begins to harden. Delaying placement can lead to difficulties in condensation and adaptation to the cavity walls.
- Mercury evaporation:
Mercury is released as a vapor during trituration and continues to evaporate over time. Prolonged exposure to mercury vapor can pose health risks. Expediting placement minimizes this exposure.
- Strength and integrity:
Proper condensation within the initial minute is crucial for ensuring optimal strength, marginal integrity, and long-term success of the amalgam restoration.
Key points:
- Always follow the manufacturer's instructions for trituration time and speed.
- Have all necessary instruments and materials ready for immediate placement.
- Work efficiently to condense the amalgam within the 1-minute timeframe.
- Avoid any delays or interruptions during the placement process.
