What is the master impression in complete denture fabrication?

What is the master impression in complete denture fabrication?

• A. The primary impression that defines the foundation anatomy used to fabricate the record base and occlusion.
• B. The final impression used to fit the denture in the mouth.
• C. An impression used only for implants.
• D. A digital scan used for fabrication.

Answer: (A)

In complete denture fabrication, the master impression is the primary impression that records the foundation anatomy of the oral tissues. It captures the general shape and contours of the edentulous ridges, vestibules, and supporting soft tissues so a cast can be made that defines the starting geometry for the denture bases. From this cast, the record bases and occlusion rims are fabricated, and jaw relations are established. This impression sets the foundation upon which the dentures are built; it is not the final fit impression that refines tissue details and border seal. Impressions used specifically for implants or digital scans are not what this traditional term refers to in this context.

In complete denture fabrication, the master impression is the primary impression that records the foundation anatomy of the oral tissues. It captures the general shape and contours of the edentulous ridges, vestibules, and supporting soft tissues so a cast can be made that defines the starting geometry for the denture bases. From this cast, the record bases and occlusion rims are fabricated, and jaw relations are established. This impression sets the foundation upon which the dentures are built; it is not the final fit impression that refines tissue details and border seal. Impressions used specifically for implants or digital scans are not what this traditional term refers to in this context.