A 13 year old boy presents to his general dental practitioner with a broken upper incisor tooth of one day duration. He complains of pain in the tooth when drinking cold water. On examination the enamel of the incisal edge has been chipped off, and the underlying dentin exposed. Which of the following contents of he dentinal tubule are most likely to be responsible for the pain felt by the patient?

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A 13 year old boy presents to his general dental practitioner with a broken upper incisor tooth of one day duration. He complains of pain in the tooth when drinking cold water. On examination the enamel of the incisal edge has been chipped off, and the underlying dentin exposed. Which of the following contents of he dentinal tubule are most likely to be responsible for the pain felt by the patient?






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