Prosthodontics & Occlusion · single question
During the movement from protrusion back to maximum intercuspation (MIP), what occlusal relationship exists?
Show answer and explanation
Correct answer: A. Cusp-to-fossa relationship
✓ A) Cusp-to-fossa relationship is correct.
Maximum intercuspation (MIP/ICP) is defined by a cusp-tip-to-fossa occlusal relationship where supporting cusps occlude into opposing fossae. This provides maximum tooth contact and bilateral stability. Cusp-to-cusp is an unstable edge-to-edge or Class II div 2 type contact. When returning from protrusion to MIP, the anterior guidance discludes the posteriors until the mandible seats into its cusp-fossa MIP position.
Maximum intercuspation (MIP/ICP) is defined by a cusp-tip-to-fossa occlusal relationship where supporting cusps occlude into opposing fossae. This provides maximum tooth contact and bilateral stability. Cusp-to-cusp is an unstable edge-to-edge or Class II div 2 type contact. When returning from protrusion to MIP, the anterior guidance discludes the posteriors until the mandible seats into its cusp-fossa MIP position.
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