Tooth Morphology Quiz

The imaginary line passing through the center of a tooth from its crown to its root.

The view of a tooth as seen from the front of the mouth.

The view of a tooth as seen from the side of the mouth.

The sharp cutting edge of an incisor tooth.

The upper jaw.

The ideal position for posterior teeth is usually over the crest of the alveolar ridge. This ensures optimal stability and function.

The neutral zone is the area where the tongue and cheeks balance the forces of occlusion, preventing unwanted tooth movement.

Balanced occlusion is when the forces of chewing are distributed evenly across all teeth, minimizing stress on individual teeth.

Curve of Spee is the anteroposterior curvature of the occlusal plane, following the buccal cusps of the posterior teeth. It resembles a smile.

Curve of Wilson is the lateral curvature of the occlusal plane from one side of the mouth to the other.

Monson's articulator is a dental instrument designed to simulate the movements of the jaw using a spherical theory of occlusion.

The maxillary first premolar has its buccal cusp touching the occlusal plane while the palatal cusp is slightly raised.

The maxillary second premolar has both its buccal and palatal cusps touching the occlusal plane.

Viewing a tooth from the front or the side allows you to see the long axis and understand its orientation in relation to other teeth.

The long axis of the upper first molar is slightly inclined upwards towards the mesial side when viewed from the front.

The long axis of the upper first molar is slightly inclined downwards and towards the buccal side when viewed from the side.

The upper second molar has similar long axis inclination as the first molar, but the slope is steeper.

The mesiobuccal cusp of the maxillary first molar fits into the mesiobuccal groove of the lower first molar.

The lingual cusps of the maxillary first molar touch the central fossae of the lower first molar.

The lower second molar has similar long axis inclination and relation to the maxillary teeth as the first molar, but the inclination is more prominent.

The buccal cusp of the lower second premolar touches the distal marginal ridge of the first premolar and the mesial marginal ridge of the second premolar.

The lingual cusp of the lower second premolar sits lingually between the maxillary first and second premolars.

If the maxillary posterior teeth are set first, the lower first premolar may need a slight reduction in width from its mesial contact point to fit.

If the mandibular posterior teeth are set first, a slight spacing (1/4 to ½ mm) is needed between the maxillary posterior teeth to achieve proper intercuspation.