Exam 1 (Review slides 11-20)

Question 1

Describe how the temporomandibular joint is innervated

Answer 1

Like all articulated joints in the human body, the temporomandibular joint is innervated by the SAME NERVE that provides motor and sensory innervation to the muscles that control it.
- This is primarily the trigeminal nerve (V)

Question 2

Most of the innervation to the temporomandibular joint is by what nerve? What additional innervation (sensory) is supplied?

Answer 2

Most: Auriculotemporal nerve (about 75%)

Additional: supplied by the deep temporal and masseteric nerve branching of the Trigeminal-3 (V3)

Question 3

Primary vascularization to the temporomandibular joint is with what bloody supply?

Answer 3

The superficial temporal branch of the external carotid artery

Question 4

How does the condyle receive vascular supply?

Answer 4

Through its marrow spaces from the inferior alveolar artery and feeder vessels from other branches that perforate the head from various angles

Question 5

What 3 reasons exist for the maxillary arch form to dominate or influence the mandibular arch form?

Answer 5

1. Maxillary arch is larger than in the mandible, from the distal of a third molar on one side through the middle of each tooth to the third molar on the other side
2. The maxillary arch is wider, or larger in measurement from right to left sides
3. Esthetics are embedded more in the maxillary arch than in the mandibular arch, because the smile line is extremely evident with maxillary anterior teeth

Question 6

3 important items to note with the Intra-arch alignment of teeth

Answer 6

1. Teeth primarily contact their namesakes in the opposing arch
2. Most teeth contact one additional tooth in the opposing arch
3. The maxillary third molars and mandibular central incisors have only ONE antagonist in the opposing arch.

Question 7

What teeth do the Maxillary Lateral incisor come in contact with in the mandibular teeth

Answer 7

Maxillary lateral incisor = #2

Comes in contact with mandibular #2,3

Question 8

Describe the 5 main points to a plane of occlusion

Answer 8

1. Ideal plane is not flat
2. A flat plane allows for too many contacts on most posterior teeth on both sides of the mouth
3. The proper plane of occlusion will permit simultaneous functional contacts to occur in controlled areas of the dental arch
4. A curved plane permits maximum use of tooth contacts during function
5. The teeth are strategically positioned in the arches at varied and coordinated degrees of inclination

Question 9

A flat plane allows for what?

Answer 9

too many contacts on most posterior teeth on both sides of the mouth

Question 10

The proper plane of occlusion will permit what?

Answer 10

Simultaneous functional contacts to occur in controlled areas of the dental arch

Question 11

A curved plane of occlusion permits what?

Answer 11

Maximum use of tooth contacts during function

Question 12

Occlusal forces applied to posterior teeth: The forces exerted on the first premolars are approximately what percentage compared to those exerted on the third molars?

Answer 12

Approximately 50% less than those exerted on the third molars.

Question 13

Define measurement B in occlusal forces applied to posterior teeth?

Answer 13

The distance between the condyle and the first premolars

Question 14

Occlusal contacts should ideally occur between what?

Answer 14

Between a cusp tip and the depth of a fossa, or between a cusp tip and a flat surface, which considered more stable

Question 15

Occlusal Contacts should not occur where?

Answer 15

On cuspal inclines because these are less stable

Question 16

Define a Class 1 Ideal occlusion

Answer 16

1. Ideal first molar relationship

2. Ideal canine relationship

Question 17

Define a Class 1 Malocclusion

Answer 17

1. Ideal first molar relationship
2. Non-ideal canine relationship
3. Rotated or over-inclined teeth

Question 18

Define a Class 2 Malocclusion

Answer 18

1. Distally positioned first molar and canine relationships

2. Excessive anterior horizontal overlap

Question 19

Define a Class 3 Malocclusion

Answer 19

1. Mesially positioned first molar relationship and canine relationships
2. Negative horizontal overlap

Question 20

Occlusal contacts should occur between what?

Answer 20

a Cusp tip and:
1. The depth of an opposing fossa (cusp-fossa occlusion)
2. A flat surface such as a marginal ridge
(No Triangular ridges or slopes that are similar)

Question 21

Cusp-Fossa/Marginal ridge location for Lingual cusp of the maxillary first premolar

Answer 21

Distal marginal ridge or distal fossa of the mandibular first premolar

Question 22

Cusp-Fossa/Marginal ridge location for Lingual cusp of the maxillary second premolar

Answer 22

Distal marginal ridge or distal fossa of the mandibular second premolar

Question 23

Cusp-Fossa/Marginal ridge location for Mesiolingual cusp of the maxillary first molar

Answer 23

Central fossa of the mandibular first molar

Question 24

Cusp-Fossa/Marginal ridge location for distolingual cusp of the maxillary first molar

Answer 24

Distal marginal ridge or distal fossa of the mandibular first molar

Question 25

Cusp-Fossa/Marginal ridge location for Mesiolingual cusp of the maxillary second molar

Answer 25

Central fossa of the mandibular second molar

Question 26

Cusp-Fossa/Marginal ridge location for Distolingual cusp of the maxillary second molar

Answer 26

Distal marginal ridge or distal fossa of the mandibular second molar

Question 27

Bruxism

Answer 27

Extensive and persistent maximum intercuspation occlusal contacts on inclines can lead to mobility, excessive wear, fractures and other signs and symptoms of occlusal disease