Why is a pulpal stimulator used under a restoration?

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A pulpal stimulator is used under a restoration primarily to initiate the formation of reparative dentin. This is a critical aspect of managing dental structures that have been affected by caries or trauma. The process involves stimulating the dental pulp to produce a protective layer of dentin in response to irritation or injury. This repair mechanism enhances the vitality of the pulp and helps protect it from subsequent restorations or external aggressors.

When a restorative procedure is performed, especially in deep cavities, there is a risk of pulp exposure or damage due to the proximity of the restoration to the pulp chamber. By using a pulpal stimulator, the aim is to activate the body's natural healing processes, leading to the formation of secondary or reparative dentin that can shield the pulp from further harm.

This choice aligns with the underlying biological principles of dental tissue responses, where stimulating the pulp results in the potential for self-repair and improved long-term outcomes for dental health. Other options may relate to outcomes that are not the primary function of pulpal stimulators in restorative dentistry.

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