Prosthodontics & Occlusion · single question
Why would you use a non-rigid connector in a fixed dental bridge?
Show answer and explanation
Correct answer: B. To distribute forces between abutments
✓ B) To distribute forces between abutments is the primary reason.
Non-rigid connectors (key-and-keyway type) are used in fixed bridges where the abutment teeth have different degrees of mobility or when a pier abutment exists (e.g., a 5-unit bridge with a middle pier). They allow differential movement to prevent the fulcrum effect on the pier abutment (which would cause intrusion/extrusion). They distribute occlusal forces more equally across abutments and relieve stress concentration at the connector-abutment interface.
Non-rigid connectors (key-and-keyway type) are used in fixed bridges where the abutment teeth have different degrees of mobility or when a pier abutment exists (e.g., a 5-unit bridge with a middle pier). They allow differential movement to prevent the fulcrum effect on the pier abutment (which would cause intrusion/extrusion). They distribute occlusal forces more equally across abutments and relieve stress concentration at the connector-abutment interface.
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