How is the intercuspal position established in natural dentition?

• A. By the condylar position fixed in the fossa
• B. By the tooth-to-tooth contacts achieved during maximum intercuspation, with condylar position variable
• C. By the incisal edge positions during protrusion
• D. By the palate-tulip alignment of the teeth

Answer: (B)

Intercuspal position is defined by the way the teeth come together in maximum intercuspation, so the final bite is determined by the tooth-to-tooth contacts themselves. In natural dentition, these contacts—especially between the posterior teeth—guide the mandible into the position where the occlusal surfaces fit together most snugly. The condyles don’t lock into a single fixed position to establish this bite; they can occupy slightly different positions within the glenoid fossae as the teeth achieve maximal contact. This makes ICP a tooth-driven position with a variable condylar position, distinct from other relations that depend on a fixed condylar posture or on incisal guidance during protrusion. The other ideas describe movements or alignments that don’t establish ICP in natural dentition.