Occlusion

Question 1

What are the muscles of mastication

Answer 1

temporalis
pterygoid muscle
Masseter.

Question 2

The MB cusp of max 1st molar bisects buccal groove of mand 1st molar.

Answer 2

Angle’s Class 1 occlusion.

Question 3

The MB cusp of max 1st molar is mesial to mand 1st molar’s buccal groove

Answer 3

Angle’s Class II Occlusion

Question 4

Overbite

Answer 4

Angle’s Class II Occlusion

Question 5

The MB cusp of Max. 1st molar is distal to buccal groove of mand 1st molar

Answer 5

Angle’s Class III

Question 6

Underbite

Answer 6

Angle’s Class III

Question 7

T/F For class I there is both normal and malocclusion.

Answer 7

True

Question 8

_____ _______ occurs when the mandibular anterior teeth overlap the maxillary Anterior Teeth

Answer 8

Anterior Crossbite

Question 9

_______ _______ occurs when the mandibular posterior teeth overlap the Maxillary Posterior Teeth

Answer 9

Posterior Crossbite

Question 10

Extent of vertical (superior-inferior) overlap of the Maxillary Central Incisors over the Mandibular Central Incisors.

Answer 10

Overbite

This is measured relative to the incisal ridges/ edges.

Question 11

Extent of horizontal (anterior-

posterior) overlap of the Maxillary Central Incisors over the Mandibular Central Incisors.

Answer 11

Overjet

Question 12

Which class of Angle’s occlusion is Over jet categorized in?

Answer 12

Type II

Question 13

Abnormal posterior positioning of themaxilla or mandible, relative to the facial skeleton and soft tissues.

◼More common in mandible. 
◼Usually not seen straight on, but seen
in profile. 
◼Can make a patient look like they
have a severe overbite.

Answer 13

Retrognathic

Question 14

Marked protrusion of either the maxilla or mandible.

◼If not extremely severe can be treated in growing patients with orthodontic appliances.

◼In severe cases and adult patients, correct usually requires
surgical/orthodontic treatment

Answer 14

Prognathic

Question 15

“move lower jaw R (or
L) while keeping your
teeth in light contact”

Answer 15

Lateral Excursions

Question 16

“move mand straight
forward while keeping
teeth in light contact” see which teeth
guide

Answer 16

Protrusive

Question 17

What are three evidences of Occlusal Trauma?

Answer 17

Wear Facets

Broken Restorations

Chipped Teeth

Question 18

“rubbing, gritting,

or grinding together of the teeth, usually during sleep.”

Answer 18

Bruxism

Question 19

What are two common causes of Bruxism?

Answer 19

Stress

Malocclusion

Question 20

benign growth of new bone on top of existing bone.

Answer 20

Exostosis

Question 21

Loss of cervical area due to bruxism

Answer 21

Abfraction

Question 22

What are some evidences of Bruxism?

Answer 22

Exostosis

Recession

Periodontal Disease

Abfraction

Excessive Attrition

TMJ

Headaches

Sore muscles

Cheek Irritation (Linea Alba

Scalloped Tongue

Question 23

loss of normal tooth structure as a result of functional or parafunctional tooth to tooth contact.

Answer 23

Attrition

Question 24

A form of non-carious tooth loss occurring
along the gingival margin. It is a mechanical loss of tooth structure. Usually from flexural forces or over zealous tooth brushing.

Answer 24

Abfraction

Question 25

originating from friction or mechanical forces-foreign object.

Answer 25

Abrasion

Question 26

Wearing away of the tooth surface by

an acid.

Answer 26

Erosion

Question 27

erosion on the lingual surface of the tooth is evidence of _____.

Answer 27

Bulimia

Question 28

Oral Signs of ______ include:

“raised”
amalgams

thermal
sensitivity

Thinning or Chipping of incisal edges

Anterior Open Bite

Loss of Vertical Dimension

Answer 28

Bulimia