Relining Removable Dentures: When and How to Do It

The clinical difference between hard relining and soft relining, when one is needed over the other, and why relining always remains a temporary solution meant to postpone, not avoid, a new denture.

Over time, the natural bone remodeling of the edentulous arch progressively changes the relationship between the denture base and the underlying tissues, gradually making the denture less stable and less well-fitting, even without any visible structural damage. Relining addresses exactly this mismatch: it adds new material to the inner surface of the denture to restore its fit to the tissues, without having to rebuild the entire appliance from scratch.

Hard relining uses non-resilient materials — rigid polymethyl methacrylate resins, the same chemical family as the original denture base — and is the indicated choice when the goal is to restore genuine, stable, long-lasting mechanical fit of the denture to the tissues. Soft relining, by contrast, uses resilient materials — typically polyvinylsiloxanes (silicones) or acrylic resins modified with plasticizers — that remain elastic over time, acting as a cushioning pad between the rigid denture base and the underlying oral mucosa.

Clinical indications for soft relining particularly include especially sharp or thin bony ridges, where a rigid base would cause repeated trauma to the mucosa with every chewing load, and cases of bony undercuts that make inserting and removing the denture difficult. Soft relining is also used as a tissue conditioner: in cases of mucosa inflamed by a long-poorly-fitting denture, a temporary soft reline can promote tissue healing even before proceeding to a definitive reline or a new functional impression.

It's important for the patient to understand a clear clinical point: however effective, relining always remains an economical, transitional solution, useful for postponing the fabrication of a completely new denture over time, not for replacing it indefinitely. Bone remodeling of the edentulous arch is a continuous process that doesn't stop with relining itself, and a denture relined multiple times over the years still reaches a point where simply adjusting the base is no longer enough to ensure adequate function and comfort, making a new denture built on an updated impression of the current arch necessary.

On Oralzon you'll find materials for both hard and soft relining, including extra-soft formulations for conditioning inflamed tissue before definitive relining.