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FixedPros > Q1, E1 L1&2-intro & cust trays > Flashcards

Q1, E1 L1&2-intro & cust trays Flashcards

1
Q

Whats the key for a prosthetic subsitiue?

A

it has to be BIOCOMPATIBLE!

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2
Q

________:A restoration that restores all but one coronal surface of a tooth or dental implant abutment, usually not covering the facial surface.

A

Partial Veneer Crown (3/4 crown)

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3
Q

A restoration that restores one or more cusps and adjoining occlusal surfaces or the entire occlusal surface and is retained by mechanical or adhesive means.

A

Onlay

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4
Q

1: Within the confines of the cusps and normal proximal/axial contours of a tooth 2: Within the normal contours of the clinical crown of a tooth

A

Inlay

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5
Q

Any dental prosthesis that is luted, screwed or mechanically attached or otherwise securely retained to natural teeth, tooth roots, and/or dental implant abutments that furnish the primary support for the dental prosthesis, which is being used to replace one or more missing teeth.

A

Fixed Partial Denture

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6
Q

______: An artificial tooth on a Fixed dental prosthesis that replaces a missing natural tooth, restores its function, and usually fills the space previously occupied by the clinical crown

A

Pontic

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7
Q

________: Any type of device used for the stabilization or retention of a prosthesis

A

Retainer(the crown) vs (the abutment is the tooth/implant)

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8
Q

_______: A tooth, a portion of a tooth, or that portion of a dental implant that serves to support and/or retain a prosthesis

A

Abutment

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9
Q

95% of adult occlusion is going to be cusp relationship? What is the other 5%??

A

Cusp to Marginal Ridge (tooth to 2 teeth) (a bit more distal)…other 5% cusp to fossa (ideal) (tooth to tooth)

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10
Q

When can we shoot for cusp to fossa occlusion?

A

in full mouth reconstruction/multiple units (stick to cusp to MR with single restorations

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11
Q

The modification of the occlusal form of the teeth with the intent of equalizing occlusal stress, producing simultaneous occlusal contacts or harmonizing cuspal relations

A

Occlusial Equilibration

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12
Q

What are the 6 contacts we made after occlusal equilibration?

A

1.molar 2.molar 3.PM 4.canines 5. incisor 6.incisor

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13
Q

WHY DO WE NEVER SHORTEN A FUNCTIONAL CUSP???

A

it decreases VERTICAL DIMENSION…adjust the corresponding fossa instead.

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14
Q

Always adjust a prematurity on a triangular ridge or marginal ridge by adjusting the __________ to assure you maintain the ridge’s anatomical form.

A

mesial and distal slopes

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15
Q

Anterior pre maturities: adjust the lingual of the _______ anteriors. (Phonetics or incising ability may be affected if alter _______ incisal edges)

A

maxillary…. mandibular

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16
Q

This rule prevents adjusting the functional cusp that results in loss of vertical dimension.

A

BULL

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17
Q

Reducing vertical dimension reduces _______ with potential of developing temporomandibular joint symptoms.

A

joint space

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18
Q

This guide is designed to control adjustments to clear the protrusive interferences without reducing the vertical dimension of occlusion

A

MUDL (mesial inclines of uppers, distal inclines of lowers)

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19
Q

Clinically the objective of an occlusal adjustment is to direct the occlusal forces along the ______ of the posterior teeth while the condyles are in their _______ position

A

long axis….centric relation

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20
Q

Syneresis =

A

to give up water (dry out)

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21
Q

_________ = ability to withstand tearing

A

Tensile strength

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22
Q

________: time before material begins to set; starts from the time you began mixing & includes the time you have to load material into tray or syringe

A

WORKING TIME

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23
Q

_______: time it takes for material to be completely set (from start to finish)

A

Setting time

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24
Q

_______: time you have to mix the material

A

Mixing time

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25
Q

________ is classified as irreversible hydrocolloid

A

Alginate

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26
Q

________: because it is particles of a gelatinous (colloid) state in water (hydro).

A

Hydrocolloid

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27
Q

Where does the alginic acid come from? What is the activator for alginate? Whats the retarder?

A

Aginic acid comes from MARINE KELP!! Activator: Calcium Sulfate….Retarder: Sodium Phosphate

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28
Q

What is the optimal H2O temp for working with alginate?

A

73 degrees yo!

29
Q

What type of alginate powder do we use at ASDOH? Regular or Dustless?

A

Regular

30
Q

Impression tray: Trays should extend distally to cover the maxillary ________ and cover the mandibular ________ for maximum anatomical reproduction

A

tuberosity…retromolar pad

31
Q

Impression tray: Tray height should fully cover the ______ of anterior and posterior teeth

A

length

32
Q

Impression tray: Tray should extend beyond the facial aspect of the teeth with ____ inch of space between the tray and soft tissue, The tray size should be ________ for the patient

A

1⁄4… comfortable

33
Q

_____ may be added to the borders of the tray to extend its length or height

A

WAX!

34
Q

Wax can be placed in the ______ area of patients with high palates to eliminate voids in the palatal area

A

palatal

35
Q

Wax may be placed around the tray ________ to protect and cushion the soft tissues in the oral cavity

A

periphery

36
Q

The placement of utility wax on the posterior region of the maxillary tray prevents excessive alginate from flowing WHERE?

A

DOWN THE THROAT!

37
Q

Adhesive: Place ___-___ minutes before loading tray..What are the two uses?

A

5-10…to adhere the material to the tray AND to stop distortion

38
Q

Always take the ________ impression first. The patient is less likely to gag, thus resulting in a positive experience!!

A

mandibular

39
Q

Impression taking: Doctor ______ of the patient for mandibular and _________ for the maxillary

A

in front….to the side or posterior

40
Q

Inspector Gadget that Shiz: A smooth homogeneous ____….No _______ from the impression tray…. Coverage of the total dentition and its accompanying freni and vestibular anatomy…Presence of _____ and air bubbles…No evidence of tray visibility in the incisal
and occlusal surfaces…Sharp anatomical detail…Blood, saliva and debris

A

Setting….separation…VOIDS…

41
Q

Disinfect the impression and pour within ____ minutes

A

30 minutes!

42
Q

Agar is classified as a _______ hydrocolloid

A

reversible

43
Q

The PVS we will mainly be using is a _______ impression material and is further categorized as an ________. What does PVS stand for?

A

Elastomeric impression material….addition silicone…PolyVinyl Siloxane

44
Q

What is another name for the “rubber base” elastomeric impression material?

A

Polysulfide

45
Q

What was the first type of silicone impression material?

A

Condensation Silicones

46
Q

Which impression material am I talkin bout? Adv: Short working time, Good tear strength, Highly accurate, Minimal distortion, Dimensionally stable……Disad:Hydrogen gas release can cause dimensional change, Requires VERY DRY conditions, Expensive

A

PolyVinyl Siloxane (addition silicone)

47
Q

What type of impression material is PolyEther?

A

elastomeric impression material (Easy to break stone cast upon removal Absorbs water so must be stored dry or will experience significant dimensional change Allergic Reactions)

48
Q

Contact angle measurement on unset material is a method used to determine _______.

A

hydrophilicity

49
Q

A contact angle of GREATER than 90 degrees means it is a _______ material.

A

HYDROPHOBIC

50
Q

A contact angle of LESS than 90 degrees means it is a _______ material.

A

Hydrophillic

51
Q

COST comparison! What is the most expensive? What is the least? Where does PVS fit in?

A

Most $$$: Polyether….Least $: Alginate….PVS is 2nd most expensive!

52
Q

What has the BEST dimensional stability? What has the WORST?

A

Best: Addition silicone…Worst: Hydrocolloid

53
Q

Wettablility: BEST? Worst?

A

Best: Hydrocolloid…Worst: hydrophobic addition silicone

54
Q

STIFFNESS: Where do addition silicone and hydrocolloid fit in?

A

addition silicone is 2nd stiff…hydrocollod is LEAST stiff

55
Q

TEAR STRENGTH comparison: where do addition silicone and hydrocolloid fit in?

A

addition silicone is 2nd tear strong…hydrocollod is LEAST tear resistant

56
Q

What is the definition of an impression tray?

A

A device used to CARRY, CONFINE, and CONTROL impression material while making an impression.

57
Q

Custom tray: Maintains optimal thickness of impression materials, _____ to ____ mm for elastomers, Require _____ impression material, Provide proper ______ extensions

A

2.0 to 4.0mm…less…flange

58
Q

The gypsum components of different materials are IDENTICAL chemically; differences in these materials is attributed to _______.

A

CALCINATION…whatever the f that means

59
Q

Increase in water temperature above ___ degrees F when mixing the plaster

A

68 degrees

60
Q

Pinch of ______ (_______) can accelerate the setting of stone/plaster.

A

table salt (sodium chloride)

61
Q

SAY WHAT!?!? Plaster/Stone: Slower rate of _______ will slow down the setting time

A

spatulation

62
Q

If table salts can speed up setting time of stone, _____ (_______) in small concentrations can SLOW her down!

A

Borax (calcium salts)

63
Q

Stone/Plaster: Increase in the amount of water specified by the manufacturer, although this ______ the cast

A

WEAKENS!!

64
Q

When mixing gypsum, sprinkle the powder into the water to obtaining better mixing and reduce the chance for trapping air bubbles…SO ______ BEFORE _______

A

WATER before STONE

65
Q

Custom Trays: Used for ________ impression materials

A

elastomeric

66
Q

What type of resin did we use for our custom trays?

A

PhotoPolymerized Resin

67
Q

For PVS how much separation do we want between the tray and the teeth for the material?

A

2.5mm

68
Q

TRIPLE TRAY! _______ only (Not for implants)….Only if preparation is supported by adjacent teeth (never the most _____ tooth in the arch)

A

Single Units…DISTAL

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