How many cutting surfaces do universal curettes have?

Universal curettes are designed with two cutting edges on each working end, which means they have a total of four cutting surfaces when considering both ends of the instrument. Each end's edges are used to adapt to the tooth surfaces, making them effective for both scaling and root planing procedures. This design allows for versatile application in a variety of areas in the mouth, including anterior and posterior teeth, as well as subgingival and supragingival regions.

In contrast, instruments with fewer cutting edges would not offer the same adaptability and efficiency in periodontal treatments. Understanding the structure of universal curettes is essential for effective clinical practice in periodontology, as it emphasizes the need for the right tools to achieve optimal periodontal health.