El Maestro File 7 (plus have impression materials section added)

Crown on number 30, pt tries to close, contact interference deviates to left, lingual incline of buccal cusp needs to be altered buccal incline of the lingual cusp

buccal incline of the lingual cusp

Tolerates moisture the most - hydrocolloid, polyether, addition silicone, polysulfide

hydrocolloid,

QUESTION: Gypsum: If you have decrease spatula/mixing, you decrease expansion. If you have increase spatula/mixing, you ..............

increase expansion

Alginate (irreversible hydrocolloid) Setting time: - Increased water: powder ratio................. setting time

increases setting time

Clicking in TMJ: is internal derangment ____ reduction

internal derangement with reduction

Which is not recommended for final FPD cast impression? • irreversible hydrocolloid • reversible hydrocolloid • PVS • Polyether

irreversible hydrocolloid

QUESTION: When compared to other materials, which of the following is the main disadvantage of using polyether elastomeric impression materials:

is much stiffer

What is Bennett angle? a. it is the angle that is formed by the non-working condyle and the sagittal plane during lateral movement b. it is the angle that is formed by the condyle and the horizontal plane during protrusive movements. c. It is a difference in condylar inclination between protrusive and lateral movements d. It is the difference between in the condylar and incisal inclinations.

it is the angle that is formed by the non-working condyle and the sagittal plane during lateral movement

QUESTION: Bennett shift mainly on: __ movement or __ side

lateral movement or working side

QUESTION: Catalyst of POLYSULFIDE impression material- ___ dioxide.

lead dioxide

Wear facets on lingual incline of maxillary lingual cusp & facial incline of mandibular facial cusp on left side? pt has: left nonworking interference, protrusive interference, right nonworking interference, left working interference

left working interference

TMJ ligaments purpose is to - limit the movement of mandible, helps open mandible, helps closes mandible

limit the movement of mandible,

QUESTION: When TMJ is in rotational movement, rotation is in the

lower compartment

QUESTION: Non-working contacts: mand __ cusp ___ inlcine

mand buccal cusp lingual incline

QUESTION: Muscles elevating the jaw: (MTMS)

masseter, temporal, medial pterygoid and SUPERIOR belly of lateral pterygoid

QUESTION: If you decrease water temp (colder), you have MORE OR LESS WORKING TIME for an irreversible hydrocolloid

more working time

In restoring a canine protected occlusion, with anterior overbite of about 2mm. The buccal cusps of posterior teeth should be flat, BECAUSE they will guide the protrusion. a. both are true b. only the second statement is true c. both are false d. only the first statement is true

only the first statement is true

QUESTION: Working side interferences are seen on what surfaces? palatal inclines of buccal cusp of upper and buccal incline of lingual cusp oflower; (the nonworking cusps on the final side are interfering) - In MIP or CO, the buccal incline of palatal cusp of upper and lingual incline of buccal cusp of lower. - Balanced side interferences are buccal incline of palatal cusp of upper and lingual incline of buccal cusp of lower (it's the working cuspsinterfering)

palatal inclines of buccal cusp of upper and buccal incline of lingual cusp oflower; (the nonworking cusps on the final side are interfering)- In MIP or CO, the buccal incline of palatal cusp of upper and lingual incline of buccal cusp of lower.- Balanced side interferences are buccal incline of palatal cusp of upper and lingual incline of buccal cusp of lower (it's the working cuspsinterfering)

Most stability: hydrocolloid reversible hydrocolloid irreversible polysulfide (polyvinyl sulfide, the smelly one) *PVS and polyether were not option

polysulfide

QUESTION: Which of the following is the best for tear strength - polysulfide / polyether

polysulfide

What material would you not use for a single crown: a) polyether b) polysulfide c) PVS etc

polysulfide

Upper molar crown has a wear facet in porcelain on the MB inclination of MB cusp. Most likely associated with? Interference in protrusion and ___ interference .

protrusion & working interference

QUESTION: #30 gold crown has wear located on the MB cusp of the MB incline, cause -______and working side movement

protrusive and working side movement

QUESTION: Imbibition and syneresis affect which one the most a. reversible hydrocolloid b. impression compound c. polysulfide d. silicone

reversible hydrocolloid

QUESTION: When pouring gypsum material into an impression, which material will cause the least amount of bubbles? Polysulfide, polyether, silicone, irreversible hydrocolloid

silicone,

Polyether, disadvantage compared to other elastomeric? sticks to teeth/hard to remove from teeth, longer working time, less accuracy

sticks to teeth/hard to remove from teeth,

QUESTION: Alginate impression in 100% humidity, why will shrinkage occur? Imbibemnt, syneresis, historgysm

syneresis,

QUESTION: Dislocation of condyle- mandible deviates to the ___ side.

to opposite side

Which of the following would result in inaccurate terminal hinge record? acutely apprehensive patient, severe skeletal cl III, tooth contact, muscle pain,

tooth contact,

QUESTION: Polysulfide gives out?

water

QUESTION: Wear on buccal of maxillary premolars due to, due to mandibular movement working or nonworking?

working

The mesiobuccal incline on the mesiobuccal cusp of mand molar (with stainless steel crown) has wear. This is because of movement in which direction(s):

working and protrusive movement

QUESTION: Which impression material is least distorted by water?

Additional silicone (Condensation silicone better ans if available)

QUESTION: How do you treat bruxism? With a ___. Stress causes immune weakness which leads to disease and bruxism.

Mouthguard - Stress causes immune weakness which leads to disease and bruxism.

QUESTION: ....................... gets affected by latex, sulfur in latex gloves retards the setting of _.

Polyvinyl siloxanes (PVS)

QUESTION: IF you are making a crown but before you begin, when you do equilibration, what are you trying to achieve to get rid of the non- working interference?

Posterior dissocculusion??

QUESTION: If you both condyle break, what you get? open bite where? Will get a ___ openbite

Posterior open bite

QUESTION: Why elastomer is not a good interocclusal record? ___ occurs when mounting.

Rebound when mounting

QUESTION: Syneresis & imbibition applies to which impression material?

Reversible hydrocolloid. Irreversible is not an option

Where to the condyles go in CR? ___-___-____

Superio-anterio-Medial

____: which is the exudation of the liquid component of a gel leads to alginate shrinkage. - syneresis -imbibition

Syneresis

QUESTION: #30 hyperoccluded, deviated - incline most effected is max/mand balancing cusp?

?

QUESTION: Rotation involves what structures? Condyle, glenoid fossa, disc, TMJ

Condyle ( or condyle and disc)

longer spatulation, increase water temperature, use of slurry water, less water: powder ratio = WILL CAUSE ___ EXPANSION AND ___ SETTING TIME

greater expansion, shorter setting time

QUESTION: Condensation silicone release -is ___ alcohol as by product

ethyl alcohol as by product

QUESTION: - increase spatulation time, increase water temperature, use of slurry water, decreases water: powder ratio --->

Decrease setting time

QUESTION: What decreases setting time of Gypsum:

Decrease water: powder ratio

Alginate (irreversible hydrocolloid) Setting time: -Increased water: ................. expansion

Decreases

QUESTION: Which artery supplies the TMJ? (MADS) Deep auricular, maxillary, superficial temporal

Deep auricular, maxillary, superficial temporal...MADS - MADS: Middle meningeal from maxillary, ascending pharyngeal, deep auricular, superficial temporal

Which anatomical components are responsible for rotation of the mandible? (2)

Disc and condyle (lower)

Max molar on mesial slope of mesial lingual cusp, where do you have wear on lower teeth? Mesial or distal incline of either mesial facial or mid facial cusp?

Distal incline of midfacial cusp

Main function of the occlusal guard: • Distribute occlusal forces more evenly • To relax the musculature • Bruxism

Distribute occlusal forces more evenly

QUESTION: Addition silicones (PVS) releases? Releases __ as secondary reaction.

H2 (as secondary reaction)

_____: is the process of absorbing water leads to alginate expansion. - syneresis -imbibition

Imbibition,

QUESTION: Patient always had internal derangement with clicking. All of a sudden, no noise and open max 30 mm. What happened? Myofascial pain, Lockjaw, Internal derangement w/o reduction

Internal derangement w/o reduction

Most inaccurate impression material?

Irreversible hydrocolloid

Which material cannot be used to get cast impression? o Reversible hydrocolloid o Irreversible hydrocolloid o Polysulfide o PVS

Irreversible hydrocolloid

TMJ pain are mostly related to: - VII, -V3, -V2, -V111

-V3,

What happens when you take an impression & lip immediately swells? ___ (allergy reaction)

Angioedema (allergy reaction)

QUESTION: Which way is the articular most displaced? _____-___

Anterior-medially

You have a patient who wants an all porcelain on number 8 - the incisal edge keeps breaking off and u have to come in to repair, why does it keep breaking off? -Because the anterior guidance and the protrusive movements/ -clearance space was not properly calculated/maintained

Because the anterior guidance and the protrusive movements/

QUESTION: Which of the following systems is thought to malfunction in the hereditary form of angioneurotic edema? A. C-1 esterase B. C-1q inhibitor C. CH50 consumption D. Serine phosphatase E. Complement synthetase

C-1 esterase

Centric Relation: is mandible to maxilla Centric Occlusion: is ___

Centric Relation: Man to Max Centric Occlusion: teeth

QUESTION: Impressions, what's wrong with polyether? ITS hard and engages ____ making it stick in the patients mouth

It's hard & engages undercuts.

Which muscle mainly responsible for positioning and translating condyles?

Lateral pterygoids

QUESTION: What happens if you increase water in gypsum stone?

Less expansion and strength (b/c particles are farther apart) increase setting expansion...?

QUESTION: Non-working movement, which one is true? Lingual cusps of upper molars hit lingual inclines of facial cusps of mandibular molars.

Lingual cusps of upper molars hit lingual inclines of facial cusps of mandibular molars.

QUESTION: Pt bites down after cementing down and deviates to the right #30:

Lingual incline of the buccal cusp

QUESTION: Property of interocclusal recording material?

Low resistance to jaw closure

QUESTION: Best imaging for TMJ (soft tissue, disc & condyle of TMJ):

MRI

QUESTION: Best diagnostic eval for TMJ disc? MRI, CT, PA radiograph

MRI,

QUESTION: Trismus includes what muscle? ___ pterygoid.

Medial pterygoid

Man comes in after years of TMD with reduction and is now only able to open 25mm w/ with muscle pain. What's his disorder? ____ pain syndrome

Myofacial pain syndrome - myofacial pain syndrome (can cause clicking, limited opening, pain), internal derangement without reduction has no noises or clicking but limited opening to < 30mm

High school football player wears a mouthguard. He has crepitation of left TMJ & trigger zone tenderness to palpation of left temporalis area, stiffness upon wakening: Myofacial pain syndrome, TMJ dislodgement

Myofacial pain syndrome,

QUESTION: Contact on buccal portion of lingual cusp of maxillary molar, what kind of interference? Non-working lateral, working, protrusive

Non-working lateral,

QUESTION: Most rigid impression material:

Polyether

QUESTION: Which is hardest one to remove from the oral cavity (STIFFEST)?

Polyether

QUESTION: Which one most likely to get stuck in mouth?

Polyether

QUESTION: Patient can't speak English well, she doesn't work, she has TMJ problems, she is on meds. Which one will not affect her oral hygiene prognosis? ___ problem is not serious enough as patient can open her mouth to clean her teeth. Her meds can contribute to hygiene issues.

TMJ problems - Rationale here is; she may not be able to afford hygiene procedure, she might not understand doctor's recommendations, and her meds can contribute to hygiene issues. TMJ problem was not serious enough, as in she can open her mouth to clean her teeth.

What branch off facial nerve gets damaged the most during TMJ surgery?

Temporal

TMJ Upper compartment - _____ Lower compartment -_______ Rotation or Translation

Translation Rotation

QUESTION: What causes TMJ ankyloses? Trauma, Rheumatoid arthritis

Trauma,

When will the BULL rule be utilized with selective grinding?

Working side

QUESTION: The most stable elastic impression in moisture environment? a. polyether b. additional silicone c. condensation silicone d. polysulfide

additional silicone

Most stable impression material or provides best dimensional quality: ___ SILICONES AKA PVS

additional silicones (aka PVS)

Temporomanidibular dysfunction: the most common form of internal TMJ derangement is ___ misalignment or displacement of the articular disk ___ the condyle . Symptoms include joint pain and popping on jaw movement. Articular disk is pulled out of place anteriorly due to abnormal jaw mechanics. It may remain displaced (without reduction) or return (with reduction) Disk displacement with reduction typically causes clicking and pain when chewing. Disk displacement without reduction does not cause clicking but reduces max jaw opening to less than 30mm. surrounding tissues may become painfully inflammed (capsulitis).

anterior misalignment or displacement of the articular disk above the condyle

The mesial angle of the ML of max 2nd molar occludes with what on the man 2nd molar a. Mesial MB cusp b. Distal MB cusp c. Mesial DB cusp d. Distal DB cusp

b. Distal MB cusp

What kind of occlusion if in right lateral movement all posterior teeth are not in occlusion:

canine guidance

QUESTION: C1 inhibitors are used in angioedema to inhibit the ___ system

complement system

- older investment =

decrease expansion

- Increasing water: powder ratio -

decrease expansion, longer setting time

Gypsum: If you increase water to powder ratio, you have

decrease expansion.

QUESTION: Increased trituration time will increase compressive strength/ decrease setting expansion

decrease setting expansion

QUESTION: What happens when you increase water/powder ratio of an investment: increase thermal expansion, decrease thermal expansion,

decrease thermal expansion,

Alginate (irreversible hydrocolloid) Setting time: - mixing faster .................... setting time

decreases setting time

Alginate (irreversible hydrocolloid) Setting time: -increase water temperature ..................... setting time

decreases setting time

Symptoms of pain & tenderness upon palpation of the TMJ are usually associated with which of the following? a. impacted mandibular third molars b. flaccid paralysis of the painful side of the face c. flaccid paralysis of the non-painful side of the face d. excitability of the second division of the fifth nerve e. deviation of the jaw to the painful side upon opening the mouth

deviation of the jaw to the painful side upon opening the mouth