What immediate action should be taken if the indirect retainers do not rest on the tooth after taking an impression?

If the indirect retainers do not rest on the tooth after taking an impression, redoing the impression is the most appropriate immediate action. This is because an accurate impression is critical for ensuring that the dental appliance fits correctly and functions optimally. If the indirect retainers are not properly positioned on the teeth, it could indicate that the impression did not capture the anatomy accurately, which can lead to fitting issues with the final restoration.

Taking a new impression allows the dental professional to obtain a more precise representation of the dental arch and surrounding structures, ensuring that all components, including the indirect retainers, are correctly aligned and positioned. This step is essential to avoid further complications in treatment, such as improper fit or discomfort for the patient.

The other options, like asking the patient to reposition or checking the bite registration, may not address the fundamental issue of the inaccurate impression. Adjusting the framework also does not solve the root problem, as the primary concern is obtaining a correct and comprehensive impression before continuing with any other adjustments or restorations.