Occlusion 1

Question 1

What is a realistic definition of occlusion?

Answer 1

The dynamic morphological and physiologic relationships among all components of the mastication system include the neuromusculature, TMJs, and teeth

Question 2

What is the importance of occlusion?

Answer 2

Essential to both general and dental health
Mastication
Ability to speak
Enjoy food
Aesthetics

Question 3

What is the position called when there is complete intercuspation of the opposing teeth INDEPENDENT of condylar position?

Answer 3

Maximum intercuspal position (MIP)

Question 4

How would you define centric occlusion?

Answer 4

The occlusion of opposing teeth when the mandible is in centric relation
May or may not coincide with the MIP

Question 5

An important principle in prosthodontics is that until the ________ and ________ of the _______ are precisely determined, an accurate ________ relationship cannot be verified

Answer 5

Position, condition, TMJ, maxillomandibular

Question 6

Centric relation is ____ of tooth contact

Answer 6

Independent

Question 7

Centric relation is a maxillomandibular relationship in which the _____ articulate in the _____ against the _____ sloped of the _________

Answer 7

Condyles, anterior-superior, posterior slopes, articular eminences

Question 8

In the position of centric relation, the patient can make ____, ____, or ____ movements
Is this strained or unstrained?

Answer 8

Vertical, lateral, protrusive
Unstrained

Question 9

What are the most important things to understand about centric relation (when using it in a clinical setting)

Answer 9

Unstrained and repeatable!

Question 10

With the loss and or wear of teeth, the mandible tends to take a _________

Answer 10

Protrusive posture

Question 11

When teeth interfere with CR and or MIP, they may be _______ , resulting in __________

Answer 11

Subject to overload
Occlusal trauma

Question 12

What can happen if there is occlusal trauma?

Answer 12

Excessive wear, mobility , sensitivity or pain, fractured cusps
Nociceptor and proprioceptor signals may be increased that effect neuromuscular control - may “reroute” mandibular closure

Question 13

Which arch is normally slightly larger?

Answer 13

Max

Question 14

what are the general shapes of arch forms?
Do they have to match within a patient?

Answer 14

Square, ovoid, tapering
No

Question 15

Anatomical abnormality may be further compromised by ____, compensatory __________, ____ beyond the occlusal ____, or loss of ______

Answer 15

Occlusal wear, dental-alveolar eruption, extrusion, plane, periodontal attachment

Question 16

Maxillary posterior teeth have a horizontal overlap on the ____ aspect, while mand posterior teeth have a horizontal overlap on the ___ aspect

Answer 16

Buccal, lingual

Question 17

The occlusal plane is generally _________ antero-posteriorly relative to the ___________ by approx ___ degrees

Answer 17

Elevated, natural horizontal plane (when pt is standing), 8-10

Question 18

Normally, the max incisal edges show from ___ to ___ mm at the resting lip length with ______ showing at high smile

Answer 18

0-2
Free gingival margin

Question 19

What forms the incisal guidance/

Answer 19

Max incisors overlapping mand incisors horizontally AND vertically
Degree of horizontal and vertical overlap determines the incisal guidance angle

Question 20

What can cause incisors to not be aligned with patient’s facial midline?

Answer 20

Tooth loss, tooth size-arch length discrepancies, mesial drift, tooth agenesis, tooth wear/ altered eruption patterns

Question 21

What is the plane of occlusion
What shape is the occlusal plane

Answer 21

An imaginary surface that theoretically touches the incisal edges of the incisors and the tips of the occluding surfaces of the posterior teeth
Curved in order to touch all aspects (listed above) simultaneously

Question 22

The distance between two selected anatomical or marked points when in MIP is called the _____
What are these two points normally?

Answer 22

Vertical dimension of occlusion (VDO)
Tip of nose and chin

Question 23

What is the postural position of the mandible when an individual is resting comfortably in an upright position?
In what state are the muscles in this position?

Answer 23

Rest vertical dimension (RVD)
Minimally contracted (resting !!!)

Question 24

The distance between the occlusions surface of the max and mand teeth when the mand is in a specified position is called the

Answer 24

Interocclusal distance

Question 25

The difference between the RVD and the OVD is called the _______ What’s another name for this?

Answer 25

Interocclusal rest distance (IRP) RVD-OVD= IRD Freeway space

Question 26

Which curve is viewed from the lateral aspect and is curving upwards in an anterior to posterior direction? (Incisal and cusp edges_

Answer 26

Curve of spee

Question 27

Which curve is viewed from the coronal plane and refers to the posterior region being on the edges of this plane? This curve is ______ and the cusps lie on this curve

Answer 27

Monsons /wilsons curve Concave

Question 28

Which curve is related to aligning each tooth for the maximum resistance to functional loading?

Answer 28

Curve of spee

Question 29

The relationship between the _______ and the _______ relates to the condylar path of protrusion If the curve passes through the ____, the posterior teeth will be ____ by the normal condylar path on its ______ condylar eminence In simple terms, what does this mean?

Answer 29

Curve of spee, condylar axis Condyle, discluded, steeper Pt would not be able to chew!

Question 30

The ____ inclination of the posterior teeth is nearly parallel with the inward pull of the _____ Which curve is this related to?

Answer 30

Axial, lateral pterygoid muscles Curve of Wilson

Question 31

When the teeth are aligned with the __________, it produces the greatest resistance to masticatory forces Which curve is this related to?

Answer 31

Principle direction of the muscle contraction Curve of Wilson

Question 32

The inward inclination of the _________ is designed for direct access of food from the ____, with no blockage by ____ by the action of tongue Which curve is this related to ?

Answer 32

Lower occlusal table, lingual, lower cusp Curve of Wilson

Question 33

Which tooth is the “key” to occlusion

Answer 33

Max first molars 50% of chewing on first molars

Question 34

In class 1 occlusion, the ____ cusps of the max first molar is aligned directly over the _____ on the mand first molar

Answer 34

Mesiobuccal cusp, mesiobuccal groove

Question 35

In class 1 occlusion, incisal edges of max teeth are ___ to the incisal edges of mand teeth Incisal margins of the ________ occlude with or lie directly below the _____ surfaces of the ____

Answer 35

Labial Mand incisors, palatal , max incisors

Question 36

In which class of occlusion does it seem that the mandible is smaller than the maxilla

Answer 36

Class 2

Question 37

In class 2 occlusion, mand teeth are ____ to their normal max teeth Occlusion at least _________ to the mand 1st perm molar

Answer 37

Distal Half a cusp more mesial

Question 38

In class 2 occlusion, there is an ____ overlap of max incisors over mandibular Incisal margins of the mand incisors lie ________ on the palatal surfaces of max incisors

Answer 38

Abnormally large Behind the cingulum plateau

Question 39

In class 2 division 1, Max incisors have a ____ inclination, also called ______

Answer 39

Labial, proclined

Question 40

In class 2 division 2, max incisors have a ______ inclination, also called ______

Answer 40

Lingual, retroclined

Question 41

In which division of class 2 occlusion would you see massive overjet?

Answer 41

Division 1

Question 42

In which class 2 occlusion would you see failure of anterior lip closure due to a V-shaped upper arch?

Answer 42

Division 1

Question 43

In which class 2 division would you see a deep overbite?

Answer 43

Both 1 & 2

Question 44

In class 3 occlusion, which arch is larger? Lower anterior incisors are______ or _____ to upper anteriors

Answer 44

Mand In edge to edge, labial

Question 45

In class 3 occlusion, incisal margins of the mand incisors lie in front of the _____ on the palatal surfaces of the max incisors

Answer 45

Cingulum plateau

Question 46

In class 3 occlusion, mand molars are ____ Max first perm molar occludes at least _____ more ____ to the mand first perm than a normal class 1 relationship

Answer 46

Mesial A half a cusp more distal