Prosthodontics & Occlusion · single question
When in the RPD design process is the survey line determined?
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Correct answer: B. On the diagnostic (study) model during treatment planning
Surveying occurs on the DIAGNOSTIC (study) model during the RPD treatment planning phase. The dentist uses a dental surveyor to: (1) select the path of insertion, (2) identify the height of contour on each abutment, (3) plan clasp design, (4) determine survey lines — ALL before the final impression and framework fabrication.
- A. ❌ Wax try-in is a late stage after framework fabrication — too late for initial surveying.
- B. ✅ Surveying on the diagnostic/study model during treatment planning — the correct timing.
- C. ❌ Framework casting occurs AFTER the survey-guided design is finalized.
- D. ❌ Final impression is taken after treatment planning — surveying comes first.
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