Australian Dental Council (ADC) Practice Test

The correct choice emphasizes that the depth of rest seats cannot be determined through survey analysis of a partially edentulous cast. When conducting a survey analysis, the process involves examining the cast to identify various topographical features and anatomical landmarks that influence the design of removable prosthetics.

While survey analysis effectively helps identify areas for blockout of rigid parts, guideline planes, and retention features based on the contour of the cast, the actual measurement of the depth of rest seats requires more direct evaluation. Depth is a quantitative characteristic that often necessitates physical examination or further measurements during the prosthetic design stage. It depends on the individual anatomy and the specific design requirements of the prosthetic device, which might not be fully ascertainable through a survey alone.

In contrast, the other options relate to aspects of the cast that can indeed be observed and inferred through the survey process, allowing clinicians to formulate effective treatment planning based on the configuration of the edentulous areas.