Clinical considerations for complete denture relining

The residual alveolar ridge below the denture base undergoes physiologic changes over time, which results in the existing dentures becoming less accurate with the residual alveolar ridge.In addition, changes of the occlusal plane, decreasing in vertical dimension and loss of denture retention and facial support can occur.Consequently, denture relining may be required to accommodate these changes and ensure an ongoing close fit.Relining a denture can be performed directly on the chairside using autopolymerizing relining materials or indirectly in the laboratory using heat-cured relining materials.A direct relining method is not only simple but also time and cost effective.However, irritation or burning sensation of the mucosa can occur, and poor bonding of the relining material to the denture base can be cited as disadvantages.The indirect relining method exhibits relatively high bonding strength between the relining material and the denture base, but the patient might experience discomfort during relining process period.This report will examine the characteristics of relining materials, including those used in the relining of CAD-CAM dentures, and explore the clinical considerations for relining procedures.