By etching dentin, the smear layer and minerals from the dentin are removed. What happens if the resultant dentin is left moist?

When dentin is etched, the process removes the smear layer and some of the minerals from the dentin surface. The smear layer, a thin layer of debris created during tooth preparation, can inhibit bonding effectiveness if not adequately removed. By etching, the dentin surface becomes more receptive to bonding processes, allowing for better adhesion between the dental material and the tooth structure.

If the resultant dentin is left moist, it creates an environment that is conducive to optimal bonding. Moist dentin allows for the formation of a hybrid layer when bonding agents are applied. This hybrid layer forms because the moisture facilitates the penetration of resin into the dentin, enhancing the bond strength.

The correct answer is derived from the understanding that while the first statement about etching dentin and removing the smear layer and minerals is true, the second statement regarding the consequences of leaving dentin moist can be misleading depending on context. However, in modern adhesive dentistry practices, leaving dentin slightly moist is generally preferred since it aids bonding.

Thus, the first part of the statement is true, and the implications of leaving the dentin moist contribute positively to the bonding process, making the second part false in a broad context. Therefore, the correct choice represents this distinction accurately.