Pit-Fissure Caries Location — NDEB AFK MCQ
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Correct answer: D — Central fossa and pit-fissure system on the occlusal surface
The central fossa and pit-fissure system on the occlusal surface is the most common site for caries on the mandibular first molar in children. Pit and fissure caries accounts for approximately 80-90% of caries in permanent posterior teeth. This is because the deep, narrow fissure morphology traps bacteria and food debris in an environment that is inaccessible to brushing and natural cleansing. Sealant application soon after eruption (age 6-7 for first molars) is the most effective prevention strategy.
Reference: Fejerskov & Kidd – Dental Caries: The Disease and Its Clinical Management, 3rd ed., 2015