The correct answer is C- 1,2 3 are true
Definition of RPP: a disease of the periodontium that occurs in an otherwise healthy adolescent, characterized by rapid loss of alveolar bone, lack of severe clinical signs of inflammation, and sparse plaque accumulation. Destruction is not commensurate with local factors.
Characteristics of RPP:
Onset around puberty (11-15 years of age)
Isolated areas of attachment loss and bone loss
(greater at permanent incisors and 1st molars)
Evidence of local, specific bacterial causes
Actinobacillus actinomycetemcomitans, Capnocytophaga
Rod gram - negative obligate anaerobe, found at the base of pocket
Neutrophil dysfunction is a common feature
Familial distribution of the disease, and there is no identified systemic disease.
PF Fedi et al The Periodontic Syllabus, 4th Ed pp 34-35.

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