The need for interim reliners indicates ongoing changes in the edentulous ridge, typically due to healing or resorption after extractions. Immediate complete dentures are placed directly post-extraction, and unstable tissues require frequent adjustments to maintain fit and function. This need complicates immediate denture service because it compromises retention and patient comfort. Thus, if interim reliners are needed, immediate dentures may not be suitable until stabilization occurs. This ensures optimal denture adaptation and reduces trauma to healing tissues. Patient age, edentulous arch, or presence of caries are not absolute contraindications for immediate dentures.

Reference: Contemporary Fixed Prosthodontics, Rosenstiel, 5th Edition.