Why is it important for a provisional to be placed on the tooth during the final curing stage?

Placing a provisional on the tooth during the final curing stage is crucial primarily to avoid excess shrinkage of the provisional material. When dental materials, such as composite resins, cure, they can undergo a degree of volumetric shrinkage. If a provisional crown is not properly placed on the tooth as it cures, this shrinkage can create gaps or decreased adaptation within the tooth preparation, which may result in improper fit or occlusal discrepancies. Ensuring that the provisional is seated correctly allows it to take the necessary shape and contour, which prevents problems that may arise from dimensional changes during the curing process. This careful management of shrinkage is essential for maintaining the integrity and functionality of the provisional restoration until a permanent restoration can be placed.