Preeruptive caries refers to carious lesions that develop on teeth before they have erupted into the oral cavity. Research indicates that the mandibular second molars are particularly susceptible to preeruptive caries due to their position and the timing of their eruption. They are often more difficult to clean and can be affected by factors such as the presence of other teeth and the oral environment

The local drug delivery system "ELYZOL" contains metronidazole.

A pseudo pocket may have a depth of more than 3 mm.

The word "trauma" from occlusion refers to tissue changes in the periodontium from abnormal occlusal forces.

In a deep pocket of 6 mm, calculus found only as a thin ring at the apical third may be due to fracture and dislodgement of the enamel part of calculus.