Prosthodontics & Occlusion · single question
What is the main ADVANTAGE of a non-rigid connector versus a rigid connector in a fixed partial denture?
Show answer and explanation
Correct answer: D. Allows independent movement, reducing stress on abutment teeth
The key mechanical advantage of non-rigid connectors is stress distribution by allowing differential movement between abutments.
- A. Non-rigid connectors are designed to absorb and redirect forces — they are less resistant to direct occlusal forces than rigid connectors.
- B. Non-rigid connectors do not improve retention and can reduce it if not properly designed.
- C. Non-rigid connectors (precision attachments) are actually more complex and expensive to fabricate than rigid connectors.
- D. CORRECT. Non-rigid connectors allow abutment teeth to move somewhat independently, distributing rather than concentrating torquing stresses. Essential when abutments have different periodontal support or mobility.
Note: ⚑ Contested across the series: one source keyed 'esthetics'. The primary purpose of a non-rigid connector is STRESS DISTRIBUTION — it prevents torquing of abutments where there is a pier abutment or divergent path of insertion.
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