Test
Chapter 43 dent materials
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Preguntas del test (195)
1Dental materials fulfill an important role in the way dentistry is delivered today
- ATrue
- BFalse
2What is not a variable for selection of appropriate dental material for a procedure?
- AExent of decay
- Btype of defect
- Ccondition of mouth
- Dlocation of restoration
- Ecost
- Fselecting amalgam or composite
3restore or bring back to natural appearance
- Arestorative
- Bretention
- Cesthetic
4Artistically pleasing and beautiful appearance
- Arestorative
- Besthetic
5The council of dental materials, instruments and equipment was formed as a subcomittee by the ADA in combination with federal organizations to ensure standards and strict specifications are followed by dental material manufacturing companies when new materials are developed
- AVerdadero
- BFalso
6The Council of Dental Materials, Instruments and Equipment was found as a subcommittee by the ADA
- AVerdadero
- BFalso
7What professional organization evaluates a new dental material?
- ACDMIE and ADA
- BADAA and ADA
8CDMIE and ADA in combination with federal organizations to ensure that standards and strict specifications are followed by dental material manufacturer companies when new dental materials are developed
- AVerdadero
- BFalso
9The types of dental materials used to restore teeth must respond to and withstand specific factors associated with specific factors associated with oral conditions?
- ATrue
- BFalse
10What is the average biting and chewing force in the posterior area of the mouth of people with natural teeth?
- A170 pounds
- B200 pounds
- C28,000 pounds
11causes a physical change through energy and strength
- Aforce
- Bstrength
- Cmalleability
12what is the order of presser per square inch on a single cusp of a molar tooth?
- A1,000,000 pounds
- B28,000 pounds
13What must materials used in posterior teeth have to withstand force?
- Aforce
- Bstrength
14Any push or pull on matter
- Astrength
- Bcompression
- Cforce
15In turn, force can create what?
- Astress
- Bstrain
- Cstress and strain
16Reaction in material that causes distortion
- Astress
- Bstrain
17Internal reaction or resistance to applied force
- Astress
- Bstrain
18change produced as result of stress
- Astrain
- Bstress
19this stress pulls and stretches material
- Atensile
- Bcompressive
- Cshear
20example of tensile stres
- Ascissors cutting
- Btug of war
- Cchewing
21this stress pushes material together
- Acompressive
- Btensile
- Cshear
22What is an example of compressive stress
- Achewing
- Bpulling laffy taffy
- Ccutting with scissors
23this stess is the breakdown of material as the result of sliding over two areas
- Ashear
- Btensile
- Ccompressed
24example of shear stress
- Ascissors cutting
- Bchewing
- Ctug of war
25measures metals ability to withstand permanent deformation by either tensile or compressive forces
- Aductability and malleability
- Bforce and strength
26Measure of capacity of metal to be stretched or drawn by pulling or tensile force without fracturing
- Aductility
- Bmalleability
27ability to withstand permanent deformation under compressive stress without sustaining permanent damage
- Amalleability
- Bductility
28This permits a metal to be shaped into a thin sheet or plate?
- Amalleablity
- Bthermal change
29What happens when a person drinks hot coffee and then immediately eats icecream?
- Atemperature in mouth changes from 150 degrees to 100 degrees within seconds
- Btemperature in mouth stays the same
30Name two reasons thermal changes are major concern?
- Aa contraction and expansion
- Bb protects pulp from thermal shock
- Cc it can damage the gums
- Dboth a and b
31what will happen to type of dental material when temperature changes occur?
- Amaterial will contract or expand
- Bmaterial will fill up and explode
32microscopic space located at the interface of tooth structure and sealant or restoration
- Amicroleakage
- Bretention
33what can cause microleakage
- Adifferent rates of contraction and expansion can cause material to pull away from tooth
- Bfaulty restoration
- Cboth are correct
34Allowing debris and fluid to enter between restoration and wall of cavity prep
- Apercolation
- Bretention
35process of a liquid substance passing through a porous substance
- Apercolation
- Bretention
36What is another word for electrical current?
- Agalvanic action
- Belectric shock
- Cconductor of electricity
37takes place in oral cavity when two different metals are present
- Agalvanic action or electrical current
- Bcompressive stress
38what conditions cant create these electrical currents
- Asaliva contains salt which makes good conductor
- Btwo metallic components act as battery
- Cshock coming together of all these conditions
- Ddull reactor wire
39name all the conditions that can create electrical currents
- Asaliva which contains salt makes a good conductor
- Btwo metallic components of different compostition can act as battery
- Ccoming together of all these conditions
- Dcorrsion occurs
40Reaction that occurs within a metal when it is exposed to corrosive factors such as temperature, humidity and saline
- Acorrosion
- Bthermal shock
- Chardness
41surface discoloration that we see in older amalgam resotrations
- Atarnish
- Bvarnish
- Chardness
42Can corrosion/surface discoloration can be taken off?
- Ayes
- Bno
43How can surface tarnish be removed
- Apolishing agents
- Btooth brushing
- Ccurring light
44measure of resistance of metal to indentation or scratching or abrasion
- Ahardness
- Bsoftness
- Cretention
45substance will dissolve in a in another substance
- Asolubility
- Bhardness
46sand has what kind of solubility? and why
- Ahigh because it does dissolve easy
- Blow because it does not dissolve easy
47sugar has what solubility
- Ahigh solubility because does dissolve easy
- Blow because does not dissolve easy
48A material that dissolves easily in oral environment is of limited used because it will wash away and leave the tooth structure exposed
- AVerdadero
- BFalso
49name steps in application properties
- Asolubility
- Bflow
- Cadhesion
- Dretention
- Ecurring
50what does flow allow
- Aallows material to fill in prep of tooth
- Ballows moisture to take over
51stick or glue two items together
- Aadhere
- Bsolubility
52strength that causes unlike materials to adhere to each other
- Aadhesion
- Bsolubility
53ability of liquid to flow over surface
- Awetting
- Bviscosity
54what is a good example of wetting and why
- Awater because it flows easy
- Bsyrup because it slows down
55causes liquid not to flow easy
- Awetting
- Bviscosity
56what is an example of viscosity? why
- Awater because it flows easy
- Bmaple syrup because it does not flow easy
57for adhesion to take place and be permanent, dental material selected will join tooth and restoration requires
- Aa film thickness
- Ba thick thickness
58thinner film thickness the stronger adhesive junction
- AVerdadero
- BFalso
59what is the ideal film thickness for cementing permanent restoration?
- A5 mm or less
- B25 mm or less
60ability to hold things together when wont adhere to each other naturally
- Asolubility
- Bretention
- Crestoration
61setting process or dental material that is initiated by a chemical reaction or by light in blue wave spectrum
- Acuring
- Bretention
- Cnatural light
62preserved or finished by chemical or physical process
- Acured
- Badhere
63self cured hardens as result of chemical reaction of two or mixed together
- Aauto light
- Bauto cured
- Cdual cured
64a light cured material does not harden until has been exposed to a curing light and allows a more flexible curing time
- AVerdadero
- BFalso
65prepared, preserved or finished by chemical or physical process
- Adual cured
- Bauto cured
66curing takes place while material is mixed
- Adual cured
- Bauto cured
67When can a direct restorative and esthetic material be applied to tooth
- Awhen pliable
- Bcan still be adapted carved and finished
- Cboth
68an alloy with one of the constituents being mercury
- Acomposite resin
- Birm
- Camalgam
69technical name for silver fillings
- Aamalgam
- Bcomposite resin
70what is the main ingredient in amalgam
- Amercury
- Bsilver
71amalgam is safe affordable and durable and used predominately to restore premolars and molars
- Atrue
- Bfalse
72what are the indications for amalgam
- Aprimary and permanent teeth
- Bstress bearing areas of mouth
- Csmall to medium sized cavities in posterior teeth
- Dsevere destruction of tooth structure
- Efoundation of cast metal, metal ceramic and ceramic restorations
- Fwhen patients personal hygiene is poor
- Gmoisture control is problematic
- Hcost is a patient concern
73mix of two or more metals that are dissolved with each other when in liquid state
- Aalloy
- Bmatrix
74what is amalgam alloy powder composed of
- Asilver, tin, copper, zinc
- Balloy, mercury, silver, gold
75what does silver do for amalgam
- Agives it strength
- Bworkability and strength
76what is tin
- Astength only
- Bworkability and strength
77strength and corrosion assistance is?
- Azinc
- Bsilver
- Ccopper
- Dtin
78suppresses oxidation
- Asilver
- Bzinc
79what are the main differences in the composition and classification of dental amalgam alloy powders based on?
- Aalloy particle shape and size
- Bcopper content
- Czinc content
- Dmercury range
80why are high copper alloys named that
- Abecause they contain higher percentage of copper than previous alloys
- Bbecause they range high in mercury particles
81two shapes high copper alloys classified as
- Aa) spherical (round)
- Bb) irregular (not straight)
- Cc) bacili
- Dboth a and b
82high copper alloy made up of how much silver
- A20 to 50
- B40 to 70
- C0 to 60
83high copper alloy copper is how much percent
- A40 to 80
- B8 to 28
84tin high copper alloy percent is
- A15 to 30
- B30 to 80
85what is the mercury to alloy ratio known as
- Aeames technique
- BBIGMA
86what is the correct mercury to alloy ratio used?
- A1 to 2
- B1 to 1
87what is a non mercury alloy
- Agalloy
- Bpaladium
88amalgam capsules available in
- A600 mg of alloy for small restoration, 800 for large
- B200 to 1000 for large
89process by which mercury and alloy powders are mixed together to form mass of amalgam needed to restore tooth?
- Aamalgamation or trituration
- Bgriming and washing
90an object moved vertically to pound and pulverize material
- Apestle
- Bpedistool
91resin matrix is fluid like material called
- Adimetharcrylate
- BBISGMA
- Cboth
92the 3 inorganic fillerr used in composite resins are?
- Aquarts, glass, silica particles and colorants
- Bsilver copper and zinc
93largest of filler particles, providing greatest strength
- Amacrofilled
- Bmicrofilled
- Chybrid
94contains inorganic fillers much smaller
- Amacro filled
- Bmicrofilled
95which filler is used most often today, and range in particle sizes
- Amicro
- Bmacro
- Chybrid
96strenghtens resin by chemically bonding filler to resin matrix
- Acoupling agent
- Binorganic filler
97process which resin material changed from pliable state into hard restoration
- Apolymerization
- Bpigmentation
98one of the most versatile dental materials available
- Aglass ionomer
- Bamalgam
99what is the most unique feature of glass ionomer
- Areleases flouride
- Breleases saliva
100which are the noble metals in gold metal alloys
- Agold palladium and platinum
- Bzinc copper
101IRM uses include?
- Arestoration of primary teeth
- Brestorative emergencies
- Ccaries management programs
- Dplacement as a base
- Ereduce discomfort
102Type of restoration most often used in dentistry
- Aacrylic
- Bporcelain
103the most common restorative material used in dentistry is?
- Aacryclic
- Bcomposite
- Cporcelain
104Characteristics that allow dental materials to withstand oral environment and allow for easy application include which of the following?
- Amechanical and electrical properties
- Bcorrosive and thermal
- Csolubility and application properties
- Dall of these
105Dental restorative materials that are applied to tooth or teeth while material is pliable and can be adapted, carved, and finished are classified as?
- Aindirect
- Bdirect
106Ther percentage of mercury in amalgam fillings is harmful to a patient
- AVerdadero
- BFalso
107The silver filling material used for over 150 years to restore primary and permanent teeth are?
- Aamalgam
- Bcomposite
108tooth colored composite fillings are designed to be stronger than amalgam or gold restorations
- Ayes
- Bno
109conventional or traditional composites which contain largest filler particle and provide greatest strength
- Amacrofilled
- Bmicrofilled
- Chybrids
110process which resin material is changed from pliable state into hardened restoration
- Apolymerization
- Blight curing
- Cdual curing
- Dall of the above
111glass ionomer can be used as
- Arestorative material
- Bluting agent
- Cliner
- Dall
112what are advantages of glass ionomers
- Aability to bind chemically to teeth
- Breleases flouride after final setting
- Call of the above
- Dnone of them
113temporary restorative materials are used for
- Areducing sensitivity and discomfort of tooth
- Bpreventing shifting
- Cmaintain function and esthetics
- Dall
114restorative materials are used for
- Arestoration of primary teeth
- Brestorative emergencies
- Ccaries of management programs
- Dall
115in most states an expanded functions assistant may perform which functions?
- Aa IRM
- Bb Provisional restorative material
- Cc using a high speed handpiece
- Da and b
116one of the fastest and most cost effective ways of restoring esthetic appearance of teeth is
- Ableaching
- Bporcelain veneers
- Cceramic veneers
117bleaching treatments include
- Ain office bleaching and at home bleaching
- Bover the counter bleaching
- Cwhitening toothpaste and gum
- Dall
118Dental restorations created in lab by dental lab tech are classified as
- Adirect restorations
- Bindirect restorations
119Porcelain is the ceramic material chosen most often for use in dentistry why?
- Agood insulator
- Bstrength of metal
- Cesthetically improves appearance of anterior teeth
- Dall
120wetting viscosity surface characteristics and film thickness are all characteristics that effect
- Aflow
- Badhesion
121The restorative and esthetic dental materials used most commonly today include the following?
- AAmalgam
- BComposite resin
- CGlass ionomer
- DTemporary restorative materials
- ETooth whitening products
- FGold alloy
- GCeramic castings
122What is the Criteria for New Dental Material?
- Amust not be poisonous or harmful to body
- Bmust not be harmful or irritating to tissues of oral cavity
- Cmust resemble natural dentention as close as possible so esthetically pleasing
- Dmust be easily formed and placed in mouth to restore the mouth's natural contour
- Econform and function despite limited access, wet conditions and poor visibililty
123Causes physical change through energy and strength
- Aforce
- Bgalvanic action
- Cductibility
124This property permits metal to be made into a thin wire?
- ADuctibility
- BMaleability
125What is an example of malleability?
- ARolling and hammering
- Btug of war
126It is essential that the tooth structure and restorative material have, as nearly as possible?
- Athe same rate of contraction and expansion
- Bthe same rate of tensile force and shear stress
- Cthe same rate of stress and strain
127Certain foods contain metallic forms that cause corrosion of dental material.
- ATrue
- BFalse
128An indication of the strength and wearability of an alloy or metal?
- Asoftness
- Bhardness
- Csolubility
129for flow, When decay is removed and healthy tooth structure is prepared to receive a permanent filling material, the dental material must be ___________ enough to be placed in the preparation?
- Apliable
- Bstronger
130Adhesion between a dental material and tooth structure is?
- Aa major concern
- Bnot a major concern
- Cpopular choice among dentists
131Without proper ___________ what can occur? and then what happens to the restoration?
- Amicroleakage, wetting occurs and restoration hardens smooths quickly
- Badhesion, microleakage occurs and restoration could come out
132Liquid flows more easily on a rough surface than on a very smooth surface
- AVerdadero
- BFalso
133amalgam and cast metals will not naturally adhere directly to tooth structures
- AVerdadero
- BFalso
134Retention is very important concept in dentistry because?
- Adental restorations, casting and appliances must be held in place with the use of materials and retention methods
- Bbecause you dont need a curring light
- Cit is so much easier than compostie fillings
135What will a dentist use to produce retention form?
- Abur and hand cutting instruments
- Bamalgam carrier and composite instrument
136this is placing a paste type material into tooth prep for adaptation?
- Acuring
- Bretention
137when the curing action cures from start to finish by itself?
- Aauto cured
- Bdual cured
138What are direct restorative and esthetic materials?
- Aamalgam
- Bcomposite
- Cglass ionomers
- Dtemporary restorative matierals
- Etooth whitening products
139What are the contradictions to use dental amalgam?
- Awhen est-ethics is particularly important, such as anterior teeth or where viewd
- BWith patients who have history of allergy to mercury
- CWhen large restoration needed and cost of other restorative materials is not a significant factor in treatment decision
- Dwhen they tarnish
140Dental amalgam is the end result of mixing approimately equal parts of mercury an alloy powder
- AVerdadero
- BFalso
141How much mercury is in amalgam?
- A43 to 54 %
- B35 to 55 %
142How much alloy is in amalgam?
- A100 %
- B46 to 57 %
143high copper alloys are classified according to?
- Athe particle size
- Bthe particle shape
144What is galloy composed of?
- Agalladium and indium
- Btin
- Cboth
145soft sliver hued metal liquifies at 86 degrees F
- Agallium
- Bpalladium
146Mercury in dental amalgam has been under controversy and has evolved in what two directions?
- Aa) potential harm to patients from the mercury within amalgams placed in their teeth
- Bb) toxicity level of mercury vapors affecting dental personnel exposed over long period
- Cboth
147exposure to amalgam could result in tremors, kidney dysfunction, depression and central nervous system disorders
- AVerdadero
- BFalso
148How long do you triturate sybraloy
- A13 seconds
- B20 seconds
149Indications for using composite resin?
- Arestoration of class I, II, III, IV and V
- Brestoration of surface defects such as hypo-calcification, attrition, abrasion and congenital abnormalities
- Cclosure of diastema
- Desthetic recontouring of teeth such as peg laterals
150contradictions for using compostie resin
- Awhen esthetics is not important factor
- Bwith patients who do not have daily proper oral hygiene habits, especially in posterior area
- Cwhen cost is significant factor
151name the four compositions for composite in a chemical mix?
- Aorganic resin matrix, inorganic fillers, coupling agent and pigments
- Bzinc, silver, copper and tin
152what is quartz
- Arock like material
- Bwhite or colorless crystalline compound
153what is silica
- Awhite or colorless crystalline compound
- Brock like
154agent that strengthens resin by bonding filler to the resin matrix
- Acoupling agent
- Bluting agent
155Foundation that binds sunstance together, continuous phases where particles or fillers are dispersed in composite resin
- Amatrix
- Bcoupling agent
156Inorganic material that adds strength and other characteristics to composite resins
- Afiller
- Bmatrix
157Composites that have combination or mixed range of particle sizes are refered to as?
- Ahybrids
- Bfillers
158also known as conventional or traditional composites and used in 1960's
- Amacrofilled composites
- Bmicrofilled composites
- Chybrid composites
159macrofilled composites are what kind of cured and have what kind of surface
- Aself cured and have rougher duller surface
- Bself cured and have smoothest surface
160came about in 1980's, are light cured and highly polished restoration
- Amacrofilled composites
- Bmicrofilled composites
161Microfilled composites were used in anterior restorations which smoothness and esthetics where primary concern
- AMicrofilled composites
- BMacrofilled composites
162are cured with visible light curing method and can be polished smoother than macrofilled composites
- Ahybrid
- Bmacrofilled
- Cmicrofilled
163have high wear resistance and excellent shading characteristics
- Amicrofilled
- Bmacrofilled
- Chybrid
164supplied as a hybrid or nanofilled composite with enough filler included to make material wear resistant
- Aflowable composite
- Bsealant composite
165resemble flowable composites but have even more viscosity to allow material to flow into pits and fissures of tooth surface
- Aviscosity
- Bsealable composite
166Coloring comes from inorganic substances
- Atrue
- Bfalse
167Important differences in the application or technique of an amalgam restoration versus composite restoration includes the following?
- Acavity prep designed to hold resin material by means of a bonding system rather than retention
- BSome dental materials cant be used with composite resins
- CMatrix system will vary with composite resins
- Dplacement of composite resin accomplished by increments, light cured before increments happen
168can be molded or shaped?
- Apolymerization
- Bretention
169Steps for finishing a composite resin
- Areduction of material is completed by use of white stone or finishing bur
- Bfine finishing is perfromed with carbide finishing burs, then with diamond burs
- CPolishing resin starts with medium discs and finishes with superfine discs
- DFinishing strips assist with polishing interproximal surfaces
- EPolishing paste applied to a rubber cup completes this step
170Have the ability to adhere chemically ( not mechanically) to teeth
- Aglass ionomer
- Bporcelain
171type of material is especially desirable for the following applications?
- Aprimary teeth
- Bsealants
- Cfinal restorations in nonstressed areas such as V class
- Dcore material for build up
- EProvisional restoration
172Resin gives material what (for glass ionomer)
- Abetter strength
- Bgreater wear resistance
- Cimproved esthetic quality
- Dall of the above
173Glass ionomer must be mixed?
- Awithin a minute
- Bwithin 45 seconds
174For restorative purposes, glass ionomers are supplied in?
- Alight protected tubes
- Bcartridges
- Ctubs
- Dpremeasured capsules
- EFree to use
175Cautions for placing glass ionomer
- Aavoid water contamnation
- Bif has glossy appearance its starting to set
- Cprotect matrix band from material, material will adhere
176Why choose temporary restorative materials?
- Arestore function
- Bkeep patient comfortable for a limited time
- Cboth
177If tooth has lost a filling or small pit within enamel, what restoration would be used?
- AProvisional
- BImediate
178If a cusp is gone or if dentist prepared tooth for cast restoration involving gingival margin a what was selected?
- Aintermediate
- Bprovisional
179Most in office whitening products use a bleaching agent called?
- Acarbamide peroxide
- Bregular bleach for cleaning
180the bleaching gel contains how much? carbamide peroxide
- A100%
- Bbetween 10 % and 30 %
181Most whitening treatments can be done in 30 minutes to 1 hour
- AVerdadero
- BFalso
182at home teeth whitening treatments stay on teeth for about 15 to 20 minutes
- Atrue
- Bfalse
183relativlely low value that has inferior properties such as lack of resistance to corrosion and tarnish
- Abase metal
- Bpliable metal
184what are some examples of base metals?
- Airon
- Btin
- Czinc
185are described by their hardness, malleability and adapability
- Agold alloy
- Bglass ionomer
186alloy is soft, used for casting inlays
- Atype I
- Btype II
- Ctype III
- Dtype IV
187alloy is medium, used for almost all types of cast inlays and posterior bridge abutments
- Atype I
- Btype II
- Ctype III
- Dtype IV
188alloy hardens, acceptable for inlays, full crowns
- Atype I
- Btype II
- Ctype III
- Dtype IV
189alloy is very hard, partial denture alloys, designed for crown, bridges and cast removable partial dentures
- Atype I
- Btype II
- Ctype III
- Dtype IV
190Hard brittle heat and corrosive resistant such as clay
- Aceramic
- Bporcelain
191hard, white, translucent ceramic material fabricated by firing and the glazing it to match tooth color
- Aceramic
- Bporcelain
192Characteristics that allow dental materials to with stand oral environment and allow for easy application iclude?
- Amechanical properties, and application properties
- Bsolubility and corrosive
- Celectrical and thermal
- Dall of the above
193Dental restorative material applied to tooth while material is pliable and can be adapted, carved and finished by dentist?
- Adirect restorative material
- Bindirect restorative material
194Dental amalgam is composed of an alloy powder thats mixed and triturated to be mixed approximately with equal parts?
- Aamalgamator
- BBisgma
- Cmercury
195Advantages of using glass ionomers include?
- Ahas ability to adhere to teeth chemically
- Breleases flouride after final setting
Información
- Descripción
- dental materials and morphology Test sobre Chapter 43 dent materials, creado por Jennifer Panther el 15/09/2016.
- Autor
- Jennifer Panther
- Idioma
- English
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