General

Question 1

Crest of curvature

Answer 1

the highest point of a curve

Question 2

Height of Contour

Answer 2

the greatest convexity or bulge

Question 3

Anterior teeth have facial and lingual HoC in the

Answer 3

cervical third of the crown

Question 4

Posterior teeth have facial HoC in the

Answer 4

cervical third and lingual HoC in the middle third of the crown

Question 5

Contact Area

Answer 5

the small area on the mesial and distal surfaces of a tooth that touch an adjacent tooth they lie along the height of contour line and provide stability to the arch through the contact of the teeth

Question 6

Interdental Area

Answer 6

cervical to each proximal contact and between adjacent teeth

Question 7

Interdental Papilla

Answer 7

Projection of free gingival tissue occupying much of the interdental area
o in a healthy mouth the papilla forms a triangle shape from the facial view and resembles a “sagging tent” from the proximal view ( the sag is called the col, just beneath the contact area)

Question 8

Embrasures

Answer 8

v” shaped opening formed by the curved tooth surfaces that sweep away from the contact areas
o Allow chewed foods to escape from the occlusal surfaces
o Every contact area is flanked by 4 embrasures (Buccal, Lingual, Cervical, Occlusal; can see two at a time depending on your view)
o Discourage the impaction of food between teeth

Question 9

The incisocervical contact locations can be summarized by two rules

Answer 9

▪ 1) The more anterior the tooth, the more incisal/occlusal the proximal contacts
▪ 2) on any tooth (except the lower first premolar) the mesial contact area is more toward the incisal/occlusal than is the distal contact area

Question 10

Incisocervical locations of the proximal contacts of a maxillary quadrant:

Answer 10

IJ, IM, JM, MM, MM, JM, JM, JM

Question 11

Incisocervical locations of the proximal contacts of a mandibular quadrant:

Answer 11

II, II, IJ, JO, JM, JM, JM, JM

Question 12

In the anterior region, the facial and lingual embrasures have approximately equal

Answer 12

depths, meaning the contacts between anterior teeth are centered faciolingually

Question 13

In the posterior region, the lingual embrasures are deeper than the facial embrasures

Answer 13

deeper than the facial embrasures meaning the proximal contacts between posterior teeth are offset toward the facial surface