A reline and a rebase both involve an existing denture, but they change different parts of it. Understanding the distinction helps you ask what problem the proposed work is meant to solve. Neither is a universal alternative to making a new appliance.
What a reline changes
A reline changes the surface that fits against the mouth so it can better match the supporting tissues. It may be considered when the mouth has changed but other features of the denture remain useful. The bite, tooth wear and general condition still need checking.
What a rebase changes
Rebasing replaces more of the denture base while retaining suitable existing teeth and their arrangement. It is a different procedure with its own requirements. Ask the clinician to show what will be kept and what will be replaced rather than relying on the terms alone.
Ask whether the old denture is a good foundation
An appliance with worn teeth, a poor arrangement or repeated damage may not benefit from further modification. Improving the fitting surface does not automatically correct every problem with the way the teeth meet. The clinician should assess the whole appliance and your mouth.
Plan the practical details
Find out how long you may be without the denture, whether a spare can be used and what checks follow the work. Ask about cost and whether later replacement is still likely. Do not attempt to reline or rebase an appliance with household products. If the fit has changed, professional assessment is the first step, not adding material until the gap feels filled.
Sources and further reading
These sources support the clinical background. The practical planning suggestions are general guidance, not an individual diagnosis or treatment plan.
Information checked: 22 October 2026.
Related guides
This guide provides general information. Simon and your dental team can advise on your own circumstances.
