What instrument is primarily used for measuring periodontal pocket depths?

The primary instrument used for measuring periodontal pocket depths is the probe. In periodontal assessments, a periodontal probe is a delicate, calibrated instrument designed specifically to assess the health of the gums and the depth of the pockets surrounding the teeth. By gently inserting the probe into the sulcus, the clinician can measure the clinical attachment level and determine the extent of periodontal disease, if present.

This instrument usually has a marked measuring scale that allows for precise depth readings, making it essential for evaluating periodontal conditions. Pocket depth measurements greater than 3 millimeters often indicate the presence of periodontal disease which is crucial for diagnosis and treatment planning.

The other instruments listed serve different purposes in dental practice. For instance, the explorer is mainly used for detecting cavities and abnormalities on the tooth surfaces, while the sickle scaler is designed for the removal of supragingival calculus from tooth surfaces. The curette is primarily employed for subgingival cleaning and debridement but is not specifically designed for the initial measurement of pocket depths. Each instrument has its specific function, but the periodontal probe stands out for the task of measuring pocket depth accurately.