HOSA Dental Terminology Practice

Which instrument is specifically used to mix rubber base or stone?

1. Broad lab spatula

2. Narrow spatula

3. Cleoid/discoid

4. Amalgam well

The correct answer is: Narrow spatula

The instrument specifically used to mix rubber base or stone is the narrow spatula. This tool is designed with a slim, elongated blade that allows for precise mixing of materials, ensuring an even consistency which is essential when working with dental materials like rubber bases and gypsum stone. The narrow spatula's shape helps in reaching into containers and manipulating smaller quantities, which is crucial for accurate mixing. In dental practices, proper mixing of materials like rubber base or stone is vital for creating impressions and models, and the narrow spatula's design supports this task effectively by enabling controlled mixing without excess spillage or waste. The broad lab spatula, while useful for mixing, is typically better suited for larger volumes and not as effective in detailed applications like those required for rubber or stone. The cleoid/discoid is primarily an instrument used for carving amalgam restorations. The amalgam well functions as a holding container for amalgam, aiding the dentist in dispensing material, but it is not used for mixing.