occlusion final

1.5 - 2

(1 - 1.5 for gold)

how much reduction for a ceramic crown

the angle at which the condyle moves from a horizontal plane (The angle at which the condyle moves downward and forward along the articular eminence during mandibular protrusion.)

what is the condylar angle

the angle at which the non-working side moves away form the sagittal plane as viewed in the horizontal plane

what is the bennet angle

false

T or F

the intra-arch alignment means between the teeth in the opposing arch

premolar

which tooth int he maxillary arch has the least angulation when viewed from the sagittal plane?

curve of wilson

what is another name for the medial-lateral curve

occlusal table

the area defined by the cusp tips and M/D cusp arms

both statements are true

classify each statement as T or F

anterior class 1 has 2-3mm of horizontal overlap. Anterior class 1 has 2-3mm of vertical overlap.

false

T or F

anterior class 2 division 1 is when the maxillary incisors are lingually inclined

completely edentulous pt.

dentate pt. receiving extensive restorations that will alter occlusion

(also, in partially edentulous pt. that has an unstable MIP)

when is it necessary to restore in CR?

group function

occlusion for patients with:

no anterior vertical overlap (ant. open bite),

large anterior horizontal overlap (Class II div I),

and/or reverse overlap (Class III).

mutually protected occlusion (aka optimal functional occlusion)

acceptable occlusion for all patients

one tooth to two tooth arrangement

commonly used for single restorations

describe cusp-marginal ridge contact

What type of functional cusp relationship do we use when restoring both opposing quadrants of teeth

cusp-fossa

(tooth to tooth arrangement)

mandibular central incisor (max 3rd molar is only other)

which tooth only contacts one other tooth

distal marginal ridge of the mandibular second premolar and mesial marginal ridge of the mandibular first molar (cusp-marginal ridge)

distal fossa of mandibular second premolar (cusp-fossa)

where does the maxillary second premolar contact?

supero-infero movement

cusp height and fossa depths

the vertical component of occlusion affects?

anterior posterior and medial lateral movements

direction of grooves and ridges in occlusal plane, and placement of cusps in the horizontal plane

The horizontal component of occlusion affects?

plane of occlusion

curve of spee

mandibular lateral translation movement

(others: condylar guidance, anterior guidance, nearness of cusps to the controlling factors)

vertical determinants include:

effect of distance of tooth from rotating condyle and midsagittal plane

effect of mandibular lateral translation movement

effect of intercondylar distance

factors of horizontal determinants:

pharmacological therapy

(also, physical therapies that include thermotherapy, coolant, ultrasound, electrogalvanic, manual techniques, muscle conditioning, acupuncture)

examples of supportive therapy:

diagram on the left

in which diagram do MIP and CR not coincide

first statement false (determined by tooth contacts)

second statement true

classify each statement as T or F

the superior surface of the envelope is determined by the condyles. The other borders are primarily determined by the TMJ anatomy and ligaments.

- occur within the outer range of border movements and near MIP

- outer range of movement is greater in early stages of mastication

- outer range of movement is smaller in late stages of mastication

functional movements:

rotation

opening 20-25mm = what movement (picture given)

false (in a neutral unstrained position)

t or f

physiological rest position is a habitual postural of the mandible when the patient is resting comfortably in the upright position and the condyles are in a restrained position

superior joint compartment

translation of the condyles occurs in

false, trauma is no longer present. this would be true for microtrauma

t or f

for macrotrauma, definitive therapy is necessary and useful

definitive and supportive

treatment of TMD can be categorized as?

horizontal factors

__________ ____________ influence the direction of ridges and grooves on the occlusal surfaces

distance of tooth from rotating condyle

distance of tooth from midsagital plane

which of the following are horizontal factors

- distance of tooth from rotating condyle

- distance of tooth from midsaggital plane

- intercondylar height

restorations

ortho

extractions

caries

anterior guidance can be altered by what?

taller

the steeper the anterior guidance angle --> the ______________ posterior cusps

false

T or F

the further the tooth is from the TMJ, the more joint anatomy will influence its eccentric movements

patient has multiple, bilateral, even and simultaneous contacts in MIP/CR

patient has anterior guidance only in protrusion

MIP and CR and coincident

mutually protected occlusion is when:

true

t or f

non working side interferences occur between inner inclines of the maxillary lingual cusps and inner inclines of the mandibular buccal cusps

false

pt. can have class 1 angles and bad occlusion

t or f

a patient with ideal angles class 1 occlusion has optimal occlusal contacts, optimal condyle position and ideal contacts.

balanced occlusion

simultaneous contacts on working and nonworking during lateral excursive movements

muscles

genetics

habits

occlusal contacts

interproximal contacts

factors that affect tooth position

plane of occlusion

curves to fit the occlusal surfaces and incisal edges of all teeth

curve of spee

curve of wilson

compensating curve

true

t or f

posterior teeth are designed to be loaded axially, take heavy loads and support the occlusal vertical dimension

50-60%

the occlusal table is ____% of the BL width

class 3 end to end

what class

20-25mm

pure rotation occurs in the first

superior joint compartment

translation of condyles occurs in

terminal hinge axis

imaginary axis through the condyles that facilitates pure rotation

postural rest position

habitual posture of mandible when patient is sitting upright and condyles are in neutral unstrained position in the glenoid fossa

easy to mix and handle

non allergenic to patient

an ideal impression material...

impression compound

which of the following is not elastic

- impression compound

- polysulfide

- polyether

- condensation silicone

0.5-1mm

how much axial reduction on full gold crown prep

verifying occlusal clearance

what are these used for

checking reduction

what is putty used for

elevates mandible and provides chewing forces

what is the function of the masseter

patient education

diagnosis

treatment planning

purposes of articualtor

convex

occlusal plane in maxilla is (curve of spee)

The mandible and TMJs act as a Class III lever system
The more anterior (away from the fulcrum), the resistance (load) occurs, the
lesser the impact (magnitude)
The canine has the longest root, and best bone support (canine eminence) and
therefore can tolerate higher load

Why is Canine Guidance-Anterior Guidance considered the optimal occlusal scheme?

variable

anterior guidance is (vertical overlap)

balancing

Which type of occlusion

posterior controlling factor. It is a fixed factor as it is controlled by two anatomical factors amongst the two TMJs. it is the steeper eminence = taller

articular eminence and
(medial wall of articular fossa and articular eminence)

What is the condylar guidance

axial loading; light contact and guidance

posterior teeth are meant for:

anterior teeth are meant for:

border movements

The mandibular movements are limited by ligaments, the articular surfaces of the
TMJ, and the morphology and alignment of the teeth. The outer range of movement is
reproducible and called…

Condyles are in the most antero-superior position in the glenoid fossa.
Condyles rest against the posterior slope of the articular eminence (thickest bone)
therefore can tolerate higher stresses.

In the TMJ, during CR, where is the condyle?

D. A and B

Which of the following are horizontal factors  

a. Distance of tooth from rotating condyle  

b. Distance of tooth from midsagittal plane  

c. Intercondylar height  

d. A and B  

taller posterior cusps

A steeper anterior guidance angle means

B. Distal marginal ridge of maxillary second premolar and mesial marginal ridge of  maxillary first molar (MB cusp during cusp-MR occlusion) 

 In class I, the mandibular first molar can contact?  

a. Central fossa of maxillary first molar (DB cusp)  

b. Distal marginal ridge of maxillary second premolar and mesial marginal ridge of  maxillary first molar (MB cusp during cusp-MR occlusion) 

c. Triangular mesial fossa of first maxillary molar (MB during cusp-fossa  occlusion)

d. all true

 Mutually protected occlusion is when  

a. The patient has multiple, bilateral, even and simultaneous contacts in  MIP/CR 

b. Patient has anterior guidance only in protrusion  

c. MIP and CR are coincident 

d. All true

NW side between inner inclines of the maxillary lingual cusps and inner inclines  of the mandibular buccal cusps 

Non working side interferences occur on 

false, can have bad occlusion

T/F a patient with ideal angles class I occlusion has optimal occlusal contacts, optimal  condyle position, and ideal contacts 

group function (WS hits)

what type of occlusion

balancing (only used in denture pt)

What type of occlusion: Simultaneous contacts on working and nonworking during lateral excursive movements 

plane of occlusion

Curves to fit the occlusal surfaces and incisal edges of all teeth  

true

T/F Posterior teeth are designed to be loaded axially, take heavy loads, support the  occlusal vertical dimension

facilitates axial loading

 question about occlusal table definition

class III end to end

which class

star = CR, heart = MIP, 1 = pure left lateral movement, 2 = left lateral with protrustion, 3 = right lateral movement, 4 = right lateral with protrusion  

ID all structures

d. B and C (near MIP, not CR)

Functional movements  

a. Occur near CR

b. The outer range is greater in early stages of mastication

c. The outer range is smaller in late stages of mastication

d. B and C 

star = retroarticular tissue, heart = articular disc

ID the two features

a. impression compound (along with zinc oxide eugenol, gypsum, impression  wax)

Which of the following is not elastic  

a. Impression compound 

b. Polysulfide 

c. Polyether 

d. Condensation silicone

true

T or F Masseter elevates the mandible and provides force for chewing

temporalis

ID

3rd point of reference

This should be repeatable and reproducible. It orients cast to reference plane or  something like that

d. all of the above

When is a facebow indicated 

a. Cusp teeth are present  

b. Interocclusal records are made at an increased OVD  

c. OVD is subject to change  

d. All of the above 

premature contact; centric interference

what is this showing/what type of interference

maxillary - working out of mouth, protrusive out

mand - working in towards mouth, protrusive in

ID the working, nonworking, and protrusive paths