A modular denture is a pre-made denture (like a modular house that needs to be put together) it usually comes in sizes like small, medium, and large. It needs to be adapted and fitted to an individual patient by a dentist using a relining material. These dentures are usually used only for emergencies as the quality, fit, and bite are compromised, compared to a custom made denture. They are rarely used and have limited availability and usage.