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