Alignment and Occlusion of the Dentition

Question 1

plane of occlusion

Answer 1

plane that would
be established if a line were drawn through all the buccal cusp tips and incisal edges of the mandibular teeth and then broadened into a plane to include the lingual cusp tips and continuing across the arch to include the buccal and lingual cusp tips of the opposite side.

Question 2

The occlusal table represents approximately —-% to —-%
of the total buccolingual dimension of the posterior tooth
and is positioned over the ——- axis of the rooth structure.

Answer 2

50% to 60%

long axis .

Question 3

Dentures: ——-% of force of natural dentition

Answer 3

25%

Question 4

INTER-ARCH ALIGNMENT

Answer 4

relationship of the teeth in one arch to these in the other.

Question 5

Normal Occlusal relationship:

Answer 5

• Maxillary posterior teeth are more facially positioned.
• Mandibular Buccal cusps to occlude along the central
fossa of the maxillary teeth

Question 6

Normal Occlusal relationship leads to

Answer 6

Ø Protect the surrounding soft tissue Ø Helps maximize the efficiency of
musculature

Question 7

Classification of cusps

Answer 7

Supporting

Guiding

Question 8

Supporting cusps

Answer 8

centric cusps, functional

Question 9

Guiding cusps

Answer 9

non-centric, guiding, shearing

Question 10

Supporting cusps

Answer 10

Normal Occlusion:
• Maxillary palatal and mandibular buccal cusps
Maintain vertical dimension of occlusion • Play a major role in mastication
• Rounded shape

Question 11

Guiding cusps

Answer 11

• Maxillary buccal and mandibular lingual • Assist in shearing of food
• Sharp tips
• Also called non-centric
• Major roles: to minimize tissue impingement and to maintain the bolus of food on the occlusal table during mastication

Question 12

NORMAL BUCCOLINGUAL ARCH RELATIONSHIP

Answer 12

The mandibular buccal cusps occlude in the central fossae of
the maxillary teeth, and the maxillary lingual cusps occlude
in the central fossae of the mandibular teeth.

Question 13

Posterior Crossbite

Answer 13

When posterior cross bite exists, the mandibular lingual cusps occlude in the central fossae of the maxillary teeth and the maxillary buccal cusps occlude in the central
fossae of the mandibular teeth.

Question 14

The ————- is the only

area of an outer incline with functional significance.

Answer 14

The functional outer aspect (FOA) of the centric cusp is the only
area of an outer incline with functional significance.

Question 15

The Guiding Inclines (GI) of the maxillary teeth are the

surfaces responsible for the characteristics of———.

Answer 15

anterior guidance