Which periodontal instrument can be used both supragingivally and subgingivally?

A universal curette is designed with a rounded back and a curved blade, making it suitable for both supragingival (above the gum line) and subgingival (below the gum line) scaling and root planing. The versatility of the universal curette allows it to effectively remove plaque, calculus, and debris from tooth surfaces that are both visible and hidden below the gumline. This dual functionality is essential during periodontal therapy, where access to all areas of the tooth is necessary for thorough cleaning, especially in cases of periodontal disease.

In contrast, a hand scaler is primarily intended for supragingival use and has a sharp edge allowing for effective removal of supragingival calculus. It is not designed for use below the gumline, which limits its application in comprehensive periodontal care.

The Gracey curette is specifically designed for use in a subgingival context as it has a sharper, angled blade ideal for accessing root surfaces and furcations. However, due to its design, it is not typically used supragingivally.

An explorer is a diagnostic instrument used for tactile examination of tooth surfaces to detect caries, irregularities, and calculus, but it is not primarily designed for scaling purposes.

Thus, the design and functionality of the universal