Which statement correctly describes the molar/incisor pattern in the 2017 periodontal classification?

Which statement correctly describes the molar/incisor pattern in the 2017 periodontal classification?

• A. Generalized pattern
• B. Localized pattern affecting molars and incisors
• C. Localized pattern affecting canines and premolars
• D. Molar-incisor pattern is not used in classification

Answer: (B)

In this classification, periodontitis distribution is described as localized when fewer than 30% of teeth are affected, and the molar-incisor pattern specifically refers to disease that predominantly involves the first molars and the incisors. This pattern is a hallmark of a localized form and informs prognosis and treatment because those teeth often show the characteristic bone loss pattern compared with others. So describing it as a localized pattern affecting molars and incisors fits the standard definition. The other descriptions—generalized involvement, involvement of canines and premolars, or saying the pattern isn’t used—don’t match how the molar-incisor pattern is defined in the 2017 classification.

In this classification, periodontitis distribution is described as localized when fewer than 30% of teeth are affected, and the molar-incisor pattern specifically refers to disease that predominantly involves the first molars and the incisors. This pattern is a hallmark of a localized form and informs prognosis and treatment because those teeth often show the characteristic bone loss pattern compared with others. So describing it as a localized pattern affecting molars and incisors fits the standard definition. The other descriptions—generalized involvement, involvement of canines and premolars, or saying the pattern isn’t used—don’t match how the molar-incisor pattern is defined in the 2017 classification.