Which cells are responsible for building reparative dentin, and which dental material stimulates this process?

The process of building reparative dentin primarily involves odontoblasts, which are specialized cells that originate from the dental papilla during tooth development. Odontoblasts play a crucial role in the formation of both dentin and reparative dentin, especially in response to dental injury or carious lesions.

Calcium hydroxide is a dental material known for its capability to stimulate pulp healing and dentin regeneration. When used as a liner or base in restorative procedures, calcium hydroxide encourages the odontoblasts to initiate the formation of reparative dentin, effectively allowing the tooth to repair and protect itself from further damage or infection. This regenerative process is essential in maintaining tooth vitality and preserving the pulp.

In summary, the correct answer reflects the pairing of odontoblasts, which are responsible for dentin formation, and calcium hydroxide, which promotes the stimulation of reparative dentin in response to stimuli that threaten dental integrity.