Under what condition do you need a record base?

A record base is essential whenever there is a posterior edentulous area because it serves as a foundational support for the impression process. This type of base allows for accurate registration of the occlusal relationship and helps in establishing the correct vertical dimension of occlusion. With a posterior edentulous area, it becomes critical to ensure that the spatial relationships and opposing tooth structures are properly captured, which is facilitated by the use of a record base. This allows the clinician to adequately replicate the functional and aesthetic requirements of the denture in both the anterior and posterior segments of the arch.

The presence of a posterior edentulous area significantly impacts the design and stability of the removable partial denture, making it necessary to establish a solid and accurate base to work from during the fabrication of the prosthesis.