Term
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Definition
| man made materials used to replace tissues or that function in contact with living tissues. |
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Term
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Definition
| biomaterials used in or around oral cavity |
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Term
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Definition
lack of harmful effects to the patient
non toxic, non irritating |
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Term
| when was the 1st dental amalgam used |
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Definition
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Term
| who created the system of classification for dental materials and the tooth surfaces |
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Definition
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Term
| ideally dental materials should have what guidlines? |
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Definition
mechanically stable
resistent to corrosion
minimally conductive to thermal and electrical influences
asthetically pleasing
easy to manipulate
adhere to tissue
tasteless and odorless
cleanable
repairable
cost effective |
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Term
| who has a set of specifications reguarding mechanical, physical, and chemical properties and tests to make sure these guidelines are met to give seal of approval |
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Definition
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Term
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Definition
International Standards Organization
51 countries
40 specifications on dental materials |
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Term
| who has jurisdiction over safety and efficacy of medical and dental devices, including over the counter products? |
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Definition
| FDA (Food and Drug Administration) |
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Term
| how does the FDA classify? |
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Definition
| Class I, Class II, Class III |
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Term
| What does class I mean in FDA standards |
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Definition
good manufacturing standards it is the least regulated
IE-prophy paste |
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Term
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Definition
must meet certain performance standards and addresses the compositon and properties or characteristics of the device.
IE-composit or amalgam |
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Term
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Definition
most regulated class
re restrictive, ensures safety and efficacy
requires pre-market approval, clinical dates must be submitted,
ie- bone grafts or implants |
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Term
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Definition
Occupational safety and Health organization
-safe work for employees
regular training about hazards |
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Term
| who is responsible for supporting the certifications and acceptance of products |
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Definition
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Term
| what is the objective of restorative dentistry |
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Definition
replace lost or diseased teeth
restore function |
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Term
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Definition
| not planned to be replaced in a particular time period |
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Term
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Definition
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Term
| interim restorations-long term temporary |
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Definition
| in ortho-temporaries, amalgum, composit after ortho complete, crown or bridge |
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Term
| classifications of dental caries |
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Definition
Class I- pits and fissures of posteriors and lingual pits anterior
Class II- below interproximal contact posterior
Class III- interproximal of anteriors
Class IV-interproximal and incisal of anterior
Class V- gingival 3rd posterior or anterior
Class VI-cusp tips or incisal edges |
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Term
| what are the 4 classes of metals |
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Definition
metals
ceramics
polymers
composites (mixture of 2 or more of the above mentioned materials) |
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Term
| what are some examples of metals |
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Definition
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Term
| why are metals a good choice |
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Definition
-good for posteriors
-oldest of 3 major classes
-high thermal and electrical conductivity
-ductility can be bent without breaking
-high strenght
-can be shaped into crowns, inlays, onlays, cusp tips, or bridges |
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Term
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Definition
white or gray
gold is yellow
copper is red |
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Term
| what is the arrangement of metals |
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Definition
| regular crystalline arrangement in form of cube |
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Term
| what are some advantages of pfm |
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Definition
esthetic
hight strength
can be matched to any tooth color |
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Term
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Definition
poor asthetic
high strength
suitable for posteriors
larger at base of tooth than at occlusal |
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Term
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Definition
brittle, cannot be bent or deformed without cracks or breaking
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Term
| what material is a good insulator, has low thermal and electrical conductivity and has a high melting point? |
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Definition
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Term
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Definition
plastics in a long chain of molecules have covalent bonds.
they are weaker than metal
asthetically pleasing
pretty durable
good for anteriors
used for adhesives or denture materials |
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Term
| what are composites used for |
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Definition
| small anterior restorations and some posterior |
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Term
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Definition
mixtures of gases, liquids, or solids
not true solutions of one material dissolved in another
jell-o, milk |
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Term
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Definition
| type of colloid has 2 liquids that do not blend together like oil and water |
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Term
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Definition
used if deep posterior prep is required
placed below restoration
insulates the pulp from irritation from thermal sensation transmitted. |
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Term
| what is the amount of cement base usually used? |
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Definition
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Term
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Definition
restoration that restores anatomy and function of part or all of coronal portion of tooth.
can be gold, porcelain, or pfm |
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Term
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Definition
| thin jacket of porcelain that covers facial view and slightly wraps tooth at incisal, mesial and distal |
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Term
| when is dental bridge used? |
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Definition
to replace lost, or missing teeth
the two teeth that anchor are the abutments and the pontic is in the middle replacing lost teeth |
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Term
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Definition
| artificial device that replaces lost organ or bone |
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Term
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Definition
| replaces missing teeth, bone, gingiva after teeth are lost or extracted. |
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Term
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Definition
is cemented into place
ie bridge |
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Term
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Definition
| replaces few or many teeth |
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Term
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Definition
| negative copy filled with solid to form replica of teeth |
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Term
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Definition
| restoration is constructed on the replica or impression |
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Term
| what are some materials used for bridges |
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Definition
gold, nickel-chromium alloys for strength and are tarnish resistant
acrylic resin
porcelain over metal
cements for retention |
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Term
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Definition
| small metal clasps bonded on lingual surface on abutment teeth. |
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Term
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Definition
| smaller at base to allow for insertion |
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Term
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Definition
| larger than inlay extends over the cusps |
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Term
| of liquid, solid or gas which has the strongest attraction between atoms and molecules |
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Definition
solids
resist external forces
crystalline
and amorphous |
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Term
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Definition
consistant spatial relationship of atoms
ordered and uniform |
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Term
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Definition
strong atomic bonds but in short order
ie glass |
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Term
| liquids have what kind attraction between molecules |
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Definition
| not strong short range attraction |
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Term
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Definition
weakest bonds
take on shape they occupy |
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Term
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Definition
atoms of materials held together by 2 types of bonds
primary and secondary |
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Term
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Definition
involve the transfer or sharing of electrons between atoms
they are stable |
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Term
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Definition
ion pairs, uneven
when partial charge is created from an uneven distribution of electrons |
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Term
| what are the 3 types of primary bonds? |
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Definition
covalent-share electrons
ionic-one electron is given up by atom and accepted by another atom
metallic-electrons are shared by all atoms, not just 2 atoms. similar to covalent |
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Term
| what are 3 types of secondary bonds? |
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Definition
-hydrogen bonds- strongest secondary bond
-permanent dipoles
-fluctuating dipoles |
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Term
| hydrogen bonds are important in biological molecules such as? |
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Definition
DNA
protein
ligaments
cartilage |
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Term
| which bond is more stable primary or secondary? |
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Definition
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Term
| which is stronger permanent dipoles or fluctuaing dipoles |
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Definition
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Term
| metals have what kind of bond |
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Definition
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Term
| ceramics have what kind of bonds |
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Definition
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Term
| polymers are what kind of bond |
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Definition
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Term
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Definition
transmits temp to pulp
there are barriers to protect pulp like cement base |
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Term
| what materials are most similar to teeth when it comes to coefficient thermal expansion |
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Definition
| porcelain and gold are more close to tooth makeup than amalgam. |
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