Occlusion

Question 1

Any tooth structure that interferes with the arc of closure has the primary effect of displacing the mandible … producing an…

Answer 1

• forward

- anterior slide

Question 2

Line of closure interferences are those primary interferences that cause the madible to deviate… from the initial contact point (CO) to MI

Answer 2

right or left

Question 3

If an interfereing incline causes the mandible to deviat toward the cheek, the grinding rule is

Answer 3

BULL

Question 4

If an interfering incline causes the mandible to move toward the tongue, the grinding rule is

Answer 4

LUBL

Question 5

The vertical dimension of occlusion (VDO) after equilibration at CR should… before adjustment

Answer 5

remain the same as

Question 6

If forces that deviate mandible forward are eliminated, a… will be provided automatically

Answer 6

long centric

Question 7

Lateral interferences (on opening) can be divided into 2 types

Answer 7

working side and non working side

Question 8

Non working interferences grinding rule is… But as non working inclines are relivede , working may start to interfere so…

Answer 8

BULL

-usually both are adjusted together

Question 9

Before adjustment of the excursions on the working side, it is necessary to determine the type of occlusion that would be best for the patient- … or…

Answer 9

group function

anterior guidance

Question 10

patients with a large horizontal overlap benefit more from a… in working side excursions

Answer 10

group function

Question 11

The basic rule for equilibriating working side is…

Answer 11

LUBL

Question 12

the rule for eliminating protrusive interferences is

Answer 12

DUML

Question 13

posterior determinants of mandibular movements (3)

Answer 13

1. inclination of articular eminence
2. medial wall of glenoid fossa
3. intercondylar distance

Question 14

Anterior determinants of mandibular movements

Answer 14

1. horizontal overlap of ant teeth

2. vertical overlap of ant teeth

Question 15

Other determinants of mandibular movements

Answer 15

1. occlusal plane
2. curve of spee
3. neuromuscular response

Question 16

class 1 is when the MB cusp of max 1st molar is centered on … of…

Answer 16

MB or buccal groove of mand 1st molar

Question 17

class 2 is malocclusion where mandibular arch is… to max arch

Answer 17

posterior (overbite)

Question 18

class 3 is malocclusion in which mandibular arch is… to max 1st molar

Answer 18

mesial (underbite)

Question 19

… is the angle between sagittal plane and average path of nonworking condyle as viewed in transverse plane during lateral movement (fixed at 15 degrees in our articulators)

Answer 19

bennets

Question 20

… is bilateral, simultaneous anterior and posterior occlusal contact of teeth in centric and eccentric positions, characteristic of heavily worn natural teeth and complete denture design

Answer 20

balanced articulation

Question 21

… is mechanical form located on the upper-posterior region of an articulator that controls movement of its mobile member. This movement is intended to stimulate that produced by condyles in TMJ

Answer 21

condylar guidance

Question 22

… is the path traveled by mandibular condyle in TMJ during mandibular movements

Answer 22

condylar path

Question 23

… is an occlusal scheme in which the posterior teeth prevent excessive contact of the anterior teeth in MI and the anterior teeth disengage posterior teeth in all mandibular excursive movements

Answer 23

mutually protected articulation

Question 24

… is an occlusion which exists in the absence of signs and symptoms of occlusion-related pathosis. Acceptability of occlusal variation and a sense of psychological and physical patient confor are implied

Answer 24

physiologic occlusion

Question 25

... is malocclusion in which the mandibular teeth are located facial to ideal occlusal relationship with the opposing maxillary teeth when all are maximally occluded. it could involve entire mouth , specific segments, or one tooth

Answer 25

reverse articulation (crossbite)

Question 26

... i simultaneous contact of most teeth on working side but no contact on nonworking side

Answer 26

unilateral balanced occlusion (group function)

Question 27

Optimal ... and...is when teeth have contact along CR, that contact if even across all teeth and force is well distributed (CO=MI)

Answer 27

arc of closure | line of closure

Question 28

A non optimal arc of closure results in an... Grinding of will correct

Answer 28

anterior slide | MUDL

Question 29

A non optimal line of closure results in a... A grinding of... will correct is deviation is toward cheek. A grinding of... will correct deviation toward tongue

Answer 29

deviation to left or right BULL LUBL