Dental All of the following about Down’s syndrome are true except: A PDL degeneration takes place B Tooth never exfoliates though there is advanced PDL loss C Deep periodontal pockets associated with a substantial plaque D Acute necrotizing lesions are a frequent finding 💡 Explanation All of the following about Down's syndrome are true except: ✓ Correct Answer: B. Tooth never exfoliates though there is advanced PDL loss