What is a potential consequence of placing the retraction cord too deep in the gingival sulcus?

Placing the retraction cord too deep in the gingival sulcus can primarily lead to a poor impression margin due to a narrow opening. If the cord is positioned too deeply, it can hinder the adequate exposure of the preparation margins. This results in a restricted space for taking the impression, potentially leading to inaccuracies and an inadequate fit of the final restoration. A poor impression can also compromise the effectiveness of the dental procedure being performed, ultimately affecting the overall quality of care.

While other options mention concerns such as necrosis, infection, or lack of retraction, these are less directly related to the immediate effects of improper cord placement. The primary issue is related to capturing an accurate impression, which is critical for dental restorations and procedures.