Notes in DM712 - midterm

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Published	05/10/2024	Describe metallic bonds (2)
Published	05/10/2024	What are the properties of metals? (4)
Published	05/10/2024	How does metal solidify?
Published	05/10/2024	When do crystals start growing?
Published	05/10/2024	Where do nuclei mainly start forming?
Published	05/10/2024	Describe grain size
Published	05/10/2024	What is grain size dependent on? (2)
Published	05/10/2024	Faster cooling = ___ nucleation sites, but ___ grains
Published	05/10/2024	What promotes nucleation sites? (2)
Published	05/10/2024	How does grain size affect mechanical properties? (elastic limit/hardness)
Published	05/10/2024	Calculations show that it should take more force to deform metal than it actually does, why?
Published	05/10/2024	Define dislocations
Published	05/10/2024	What is a dislocation slip? (2)
Published	05/10/2024	When does a dislocation slip end? (3)
Published	05/10/2024	When does fracture occur? (3)
Published	05/10/2024	Define the following:1) elastic modulus2) elastic limit3) ultimate strength4) percent elongation
Published	05/10/2024	How to alter properties of a metal? (2)
Published	05/10/2024	Strain hardening (cold working)1) how does it work?2) how does it affect deformation?
Published	05/10/2024	What are the steps of annealing? (3)
Published	05/10/2024	Describe the recovery step of annealing (2)
Published	05/10/2024	Describe the recrystallization step of annealing (2)
Published	05/10/2024	Describe the grain growth step of annealing (2)
Published	05/10/2024	Define the following related to alloying:1) alloy2) phase3) solution
Published	05/10/2024	What are the greatest number of metallic restorative materials based on?
Published	05/10/2024	Define solid solution (3)
Published	05/10/2024	What are the different types of solid solutions? (alloy structure) (3)
Published	05/10/2024	When do interstitial solid solutions form?1) how does the solute affect the solvent?2) what does that^ produce?3) how does a solute affect a dislocati…
Published	05/10/2024	When do substitutional solid solutions form?1) when is higher solubility seen?2) is the solute the same size? what does this increase?3) ^how does tha…
Published	05/10/2024	When do intermetallic solid solutions form?
Published	05/10/2024	What are the desirable properties of alloys? (5)
Published	05/10/2024	Define tarnish- define corrosion
Published	05/10/2024	Desirable thermal properties of an alloy (2)
Published	05/10/2024	Define "castability"
Published	05/10/2024	Define biocompatibility
Published	05/10/2024	What are the elements in dental alloys? (2)
Published	05/10/2024	Describe noble elements of dental alloys- examples (3)
Published	05/10/2024	Describe base elements of dental alloys- examples (7)
Published	05/10/2024	What is silver sometimes referred to as?
Published	05/10/2024	Why is gold the "gold-standard" material?1) what is the problem w/ gold?2) what is the solution to that^
Published	05/10/2024	Why is gold alloyed w/ copper & silver?
Published	05/10/2024	What was added to copper, silver, gold alloy?1) ^why?
Published	05/10/2024	What does platinum increase in gold alloys? (2)- why is palladium sometimes used instead? (3)
Published	05/10/2024	What was added to gold alloys (copper, silver) when first trying to bake porcelain gold alloys?- what was the initial problem? (4)
Published	05/10/2024	How did platinum & palladium help baking porcelain onto gold alloys? (2)
Published	05/10/2024	Do studies show if there are any issues with reduced gold?
Published	05/10/2024	Classification of alloys (4)
Published	05/10/2024	Classification of alloys - metal content, what is found in the following?1) high noble2) noble3) predominantly base metal
Published	05/10/2024	What is identalloy?
Published	05/10/2024	What are the uses for high-noble alloys? (4)
Published	05/10/2024	What are the characteristics of high-noble alloys? (3)
Published	05/10/2024	What are the uses for noble alloys? (4)
Published	05/10/2024	How do noble alloys compare to high noble alloys? (2)
Published	05/10/2024	What are the uses for base metals? (4)
Published	05/10/2024	What gold alloy is most difficult to work with?- why?
Published	05/10/2024	What are the mechanical properties of the following alloy types:1) type I2) type II3) type III4) type IV
Published	05/10/2024	Alloys for all-metal prostheses (3)
Published	05/10/2024	All metal prosthesis: high noble & noble are __-based alloys1) color?2) composition & f(x) of each component
Published	05/10/2024	All metal prosthesis: silver-palladium1) what kind of alloy is it?2) composition?3) what if copper is & is not included?4) what does it have a tendenc…
Published	05/10/2024	All metal prosthesis: base metals1) what is the function of chromium? (2)2) what is nickel-chromium used for?3) what is cobalt-chromium used for?
Published	05/10/2024	Base metal dental alloys (5)
Published	05/10/2024	Cobalt-chromium uses (2)
Published	05/10/2024	Nickel-chromium uses (3)
Published	05/10/2024	Stainless steel uses (5)
Published	05/10/2024	What is the % Cr in the following:1) cobalt-chromium2) nickel-chromium3) stainless steel
Published	05/10/2024	Rank the following base metal dental alloys, cobalt-chromium, nickel-chromium, stainless steel, in terms of:1) yield strength2) hardness3) elastic mod…
Published	05/10/2024	Titanium use- why is it used for this?
Published	05/10/2024	Titanium alloy composition (3)
Published	05/10/2024	Titanium alloy uses (4)
Published	05/10/2024	Comparing properties of noble & base metal dental alloys
Published	05/10/2024	Compared to FGC, PFM alloys have: (3)
Published	05/10/2024	Which are more difficult to cast PFMs or FGCs?
Published	05/10/2024	PFM alloy requirements: physical properties (2)
Published	05/10/2024	PFM alloy requirements: chemical properties (3)
Published	05/10/2024	PFM bonding mechanisms: chemical bonding is __- how does it occur?
Published	05/10/2024	PFM bonding mechanisms: mechanical bonding is ___- how does it occur? (2)
Published	05/10/2024	What is coefficient of thermal expansion? (2)
Published	05/10/2024	Do porcelain or metals have higher CTE?1) which is a better insulator?2) what contracts less when cooled? why is this good?3) which is in compression …
Published	05/10/2024	Tarnish definition (2)
Published	05/10/2024	Corrosion definition
Published	05/10/2024	Concerns w/ corrosion (3)
Published	05/10/2024	Corrosion is either __ or __- what do they both start with?
Published	05/10/2024	Describe chemical (dry) corrosion
Published	05/10/2024	What does electrochemical (galvanic) require?1) what comes into contact?2) ^ what does this result in?
Published	05/10/2024	Define oxidation & oxidation potential
Published	05/10/2024	Describe the 4 components of a galvanic corrosion cell
Published	05/10/2024	What causes galvanic corrosion (oral galvanism)?- what is the pain associated w/ galvanism?
Published	05/10/2024	Define electrode potential (v)1) if the electrode potential is more negative, the metal is easier to __ & ___2) the more positive, the more ___3) what…
Published	05/10/2024	What metals have a negative electrode potential? (from most to least negative)- positive? (most to least positive)
Published	05/10/2024	Define galvanic shock1) what is part of the external circuit?2) when is it most intense?3) what causes pain?
Published	05/10/2024	What causes galvanic corrosion in a single restoration?1) where is a more active electropotential surface found?2) what causes stress corrosion?
Published	05/10/2024	What is concentration cell corrosion also known as?1) when does this occur?2) what is there a difference in?3) what does this imply?
Published	05/10/2024	Corrosion resistance is caused by: (4)
Published	05/10/2024	"Passivating metals" - what metals are used?
Published	05/10/2024	What does chromium form?1) what does this^ do?2) what is required to passivate the alloy?3) what can disrupt protective film? what may result?4) what …
Published	05/10/2024	Types of corrosion (4)- describe each
Published	05/10/2024	What are other factors affecting corrosion? (3)
Published	05/10/2024	What are the clinical perspectives of oral galvanism? (4)
Published	05/10/2024	What are impression materials?
Published	05/10/2024	What do we need impression materials for?
Published	05/10/2024	Requisites of impression materials (7)
Published	05/10/2024	Viscoelasticity1) describe2) is it time-dependent? what does this mean?
Published	05/10/2024	Classification of impression materials __ or __
Published	05/10/2024	Elastic impression materials (2)
Published	05/10/2024	Inelastic impression materials (4)
Published	05/10/2024	Polymerization mechanism (2)
Published	05/10/2024	Polysulfides (bad odor/taste)1) catalyst?2) when were they used?3) by-product?4) pros?
Published	05/10/2024	Elastomers1) what are they?2) pros?3) viscosities?
Published	05/10/2024	Elastomers:mechanical strength & detail reproduction capability have a __ relationship
Published	05/10/2024	What is the putty/heavy used as?
Published	05/10/2024	Elastomers:__ + __ --> __
Published	05/10/2024	Fast elastomers1) goal2) higher concentration of? lower concentration of?3) faster _ & _ time
Published	05/10/2024	Addition silicon (PVS) (or vinyl polysiloxane VPS)1) commercially available as?2) reaction?3) base4) catalyst
Published	05/10/2024	PVS polymerization mechanism
Published	05/10/2024	PVS indications (3)
Published	05/10/2024	To mix PVS1) what can pentamix be used with?2) what will dispensing gun be used with? working & setting time?3) what is the digit power dispenser indi…
Published	05/10/2024	How long should you wait before disinfecting PVS?- how long should you wait to pour? why?
Published	05/10/2024	PVS properties1) resolution2) accuracy3) dimensional stability4) elastic recovery5) flow, unset6) working time7) setting time8) snap set9) flexibility…
Published	05/10/2024	PVS advantages (4)
Published	05/10/2024	PVS disadvantages (5)
Published	05/10/2024	Hydrophilic addition silicone (PVS)1) contact angle2) what is proper moisture control crucial for?
Published	05/10/2024	Surfactant definition
Published	05/10/2024	Why not add surfactants in PVS composition?
Published	05/10/2024	Polyether1) viscosity2) is there occlusal registration material?3) base? (3)4) catalyst? (3)5) is there formation of gas?
Published	05/10/2024	Polyether indications (3)
Published	05/10/2024	Do you need a tray adhesive for polyethers?
Published	05/10/2024	How long for polyether to return to original dimension?1) working time?2) setting time?
Published	05/10/2024	Polyether properties1) snap set2) hydrophilic?3) flexibility4) tear strength5) patient acceptance6) handling7) stiff?8) biocompatability9) shelf-life1…
Published	05/10/2024	Polyether advantages (5)
Published	05/10/2024	Polyether disadvantages (4)
Published	05/10/2024	Vinyl polyether siloxane1) __ + __ = __2) goal3) who is targeted towards?
Published	05/10/2024	Indications of vinyl polyether siloxane (3)
Published	05/10/2024	Vinyl polyether siloxane - how to use it1) what is put in stock tray?2) working time?3) setting time?
Published	05/10/2024	Vinyl polyether siloxane advantages (5)
Published	05/10/2024	Vinyl polyether siloxane disadvantages (3)
Published	05/10/2024	Alginate substitutes1) ___ alginate2) __ cost __ body PVS3) what does it require?
Published	05/10/2024	Alginate substitutes indications (6)
Published	05/10/2024	Alginate substitutes1) working time2) setting time
Published	05/10/2024	Alginate substitute + regular alginates advantages (5)
Published	05/10/2024	Alginate substitute + regular alginates disadvantages (2)
Published	05/10/2024	Final considerations (5)
Published	05/10/2024	Critical thinking - education decision relies on ___
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