The corrct order of microscopic zones of dentinal caries starting from the D.E junction is_______________?
Correct answer: D. Bacterial invasion, decalcification zone, zone of sclerosis
- A. Zone of sclerosis, decalcification zone, bacterial invasion
- B. Decalcification zone, zone of scierosis, backterial invasion
- C. Zone of sclerosis, backterial invasion, decalcification zone
- D. Bacterial invasion, decalcification zone, zone of sclerosis
Explanation
Moving from the carious dentin at the dentinoenamel junction toward the pulp, the usual order is bacterial invasion, decalcification, and then sclerotic dentin. Sclerosis is the defensive response in the deeper dentin, so it lies beyond the more superficial infected and demineralized zones.
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