PULPAL PAIN
Nerve Trunk – 5th cranial nerve i.e. TRIGEMINAL NERVE

A-delta fibres:

1. Dentinal pain
2. Quick, sharp, momentary pain, which disappears quickly on removal of the stimulus
3. Large myelinated nerves
4. Joins with the odontoblastic cell layer and dentin to form the pulpodentinal complex—dentinal hypersensitivity reason- reversible pulpitis
5. Reason for acute pain
6. Found only in mature / permanent / closed apex tooth
7. EPT detects this type fibre only

C nerve fibers:

1. Pulpal pain
2. Dull, throbbing ache
3. Small, unmyelinated nerves that course centrally in the pulp
4. In irreversible cases
5. Chronic pulpitis
6. Diffuse pain, may be referred to other tooth also
7. Provoked by hot liquids or food

NOTE: VIEW PICTURE BELOW