Cavosurface margins should be checked with what instrument?

Cavosurface margins are critical areas that require proper evaluation to ensure the quality and durability of a dental restoration. The most effective instrument for checking these margins is an explorer. This tool is specifically designed to detect irregularities in dental surfaces, including caries, fractures, and defects at the margins of restorations. The explorer's sharp tip allows the dental assistant to feel for any discrepancies or areas that might indicate issues with the seal or adaptation of the restorative material.

Using an explorer helps to assess the smoothness and integrity of the cavosurface margins, which is vital for the longevity of the restoration and the health of the surrounding tooth structure.

While other instruments such as an excavator or perio probe may have their specific uses in dental procedures, they are not suited for evaluating cavosurface margins effectively. An excavator is primarily used for removing decay or debris, and a perio probe is mainly used for measuring periodontal pockets and assessing gum health. The shepherd's hook is also an explorer type but is generally less fine-tipped than the standard explorer and may not provide the same level of precision needed for checking cavity margins. Thus, the explorer remains the most appropriate choice for this purpose.