Pulp
Define pulp and describe its function.
Answer:
Pulp Definition:
- The dental pulp is defined as a richly vascularized and innervated connective tissue of mesodermal origin enclosed by dentin with communications to the periodontal ligament.
- It is the soft connective tissue that supports the dentin.
Pulp Functions:
1.Pulp Functions Inductive:
- The pulp interacts with tire oral epithelial cells and causes differentiation of dental lamina and resulting in enamel organ formation.
- The pulp also interacts with the developing enamel organ and determines a particular type of tooth.
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2. Pulp Functions Formative:
- It produces the dentin that surrounds and protects it.
- It produces dentin both under physiological and pathological conditions.
- First of all, odontoblast present in tire pulp develops the organic matrix and helps in its calcification.
- Next, the odontoblastic process develops which is a cellular extension of the odontoblast.
- These processes lay down dentin along the tubule wall as well as at the pulp-dentin interface.
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3. Pulp Functions Nutritive:
- It nourishes the avascular dentin.
- Pulp has a rich blood supply with a vascular network around the odontoblasts.
- This vascular system supplies the odontoblast and its process present within the tubule.
4. Pulp Functions Protective:
- Pulp carries nerves that give dentin its sensitivity.
- The nerve initiates reflexes that control the circulation of the pulp.
- Sensory nerves respond with pain to all stimuli.
- Sympathetic nerves provide stimulation to visceral motor fibers.
- These fibers terminate on the muscles of blood vessels.
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5. Pulp Functions Defensive or reparative:
- Pulp is capable of producing new dentin when required.
- Pulp responds to irritation created by any external stimuli by producing reparative dentin and mineralizing any affected dentinal tubules.
- Milder injury to the pulp lead to the focal secretion of the reactionary dentin matrix while greater injury lead to odontoblast cell death.
- Reparative dentin is formed to seal off the pulp from the source of irritation.
- The pulp contains inflammatory cells that help in the repair of the pulp.
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