Type of periodontitis which does not respond to therapy even after repeated treatments is: (OR) A child is having bone loss around molar and incisor region with pus discharge and calculus which cannot be treated by medications is suffering from?
**Core Concept**
Periodontitis is a chronic bacterial infection of the periodontal tissues, including the gums, periodontal ligament, and alveolar bone, leading to inflammation and potential tooth loss. The disease can be classified into various types, including aggressive periodontitis and refractory periodontitis.
**Why the Correct Answer is Right**
Refractory periodontitis is a type of periodontitis that does not respond to conventional therapy, including repeated treatments with scaling, root planing, and antibiotics. This type of periodontitis is often characterized by a persistent bacterial infection, which can be resistant to treatment. The presence of pus discharge and calculus that cannot be removed by medications suggests a chronic and aggressive bacterial infection.
**Why Each Wrong Option is Incorrect**
* **Option A:** Aggressive periodontitis is a type of periodontitis that progresses rapidly, but it can still be treated with conventional therapy and may respond to treatment.
* **Option B:** Chronic periodontitis is a type of periodontitis that progresses slowly over time, but it can still be treated with conventional therapy and may respond to treatment.
* **Option C:** Periodontal abscess is a localized infection of the periodontal tissue, but it is not a type of periodontitis that does not respond to therapy.
**Clinical Pearl / High-Yield Fact**
Refractory periodontitis often requires more aggressive treatment, including antimicrobial therapy and surgical intervention, to control the infection and prevent further bone loss.
**Correct Answer:** C. Periodontal abscess is a localized infection of the periodontal tissue, but it is not a type of periodontitis that does not respond to therapy.