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103 Cards in this Set
- Front
- Back
- 3rd side (hint)
What does the dental team do to stay up to date on the constant changes and new products?
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CE Continued Education through seminars, conferences, & magazines.
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What does the chair side dental assistant usually do with the restorative materials?
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Prepares and mixes them while the dentist puts them in the oral cavity.
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Why is knowledge of the dental properties of the restorative materials necessary for the dental assistant?
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So they can properly prepare and manipulate thems
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What is viewed both in terms of its effect on a given material and on tissues in the mouth?
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Acidity
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What is the normal pH level in the oral cavity?
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7.0
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What aids in reducing the acidity of the mouth?
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Saliva
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What is the force of attraction that holds unlike substances together?
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Adhesion
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_____ type of adhesion is quite strong and preferable, but ______adhesion is more common.
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Chemical, physical
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What is the average biting force of a personal with natural dentition?
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130-170lbs.
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What is defined as any push or pull on an object?
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Force
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This is the result of force on an object.
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Resistance
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______ is the reaction of the object to resist the external force.
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Stress
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What are the three types of stress & strain?
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Tensile, compressive, & shearing.
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What does tensile stress & strain do? What is an example?
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Pulls & stretches. A rubber band pulled in opposite directions like in orthodontics.
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What does compressive stress & strain do? What is an example?
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Pushes or compresses a material. Chewing or biting.
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What stress or strain does shearing do and what is an example?
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Slides one part of a material parallel to another part in a back and forth motion. Grinding of teeth.
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What is the result of chemical or electrochemical attacks of the oral environment on pure metal?
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Corrosion
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This material is used for study models.
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Alginate
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An example of shearing stress and strain is called ______ or grinding of teeth.
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Bruxism
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Which is not a type of stress and strain?
1. Tensile 2. Dimensional 3. Compressive 4. Shearing |
2. Dimensional
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The ability of a material to withstand compressive stresses without fracturing is known as what?
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Malleability
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_____ is the physical property of being capable of distortion or deformation by an applied force, and then returning to the original shape once the force is removed.
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Elasticity
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_____, or creep and slump, is continuous deformation of a solid.
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Flow
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An example material would be dental waxes or certain impression materials.
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Change in a dental material may result from various causes. All of the following are causes of dimensional change except:
1. Tarnish 2. Setting process 3. Exposure to cold 4. Exposure to heat |
A. Tarnish
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The seeping of saliva and debris from the oral cavity between the tooth structure and the restorative materials is called what?
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Microleakage
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_____ is the ability of a material to transmit heat.
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Thermal conductivity
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What property may make a dental material useful as a base or liner where it is not exposed to the oral fluids?
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Solubility
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In dentistry, materials that are placed directly in the cavity preparation (direct restorative materials) are kept in place by what?
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Mechanical retention
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The thicker the material, the less it flows; therefore, it is said to be more _____ than a thin material that flows easily.
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Viscous
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What is the ability of a material to flow over a surface called?
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Wettability
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Dental cements are mixed to a precise ration. Zinc phosphate cement has reached what stage when the material follows the spatula about 1 inch above the mixing slab?
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Luting
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What is placed as a thin layer on the walls and floor of the cavity preparation to protect the pulp from bacteria and irritants?
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Liner
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Bases are applied between the tooth and the restoration to protect the pulp. However, bases will not protect the pulp from what?
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Sedation of the pulp itself
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What is one of the oldest cements, which comes in a powder/liquid form and is a luting and base cement?
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Zinc phosphate
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What is the chemical reaction called when the zinc phosphate powder and liquid are mixed and the heat is released?
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Exothermic
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Glass ionomer materials come with what?
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A solvent
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Bonding agents bond to all of the following except what?
1. Varnish 2. Enamel 3. Dentin 4. Porcelain |
1. Varnish
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What is the cement that is said to be "kind" to the pulp and was the first cement that could chemically bond to the tooth structure?
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Polycarboxylate
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Adhesion of dental materials to enamel is accomplished by what?
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Acid etching
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What layer of debris prevents contact between intact dentin and the bonding agent/adhesive?
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Smear layer
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This angle is formed by the junction of the wall of the preparation and the untouched surface of the tooth.
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Cavosurface margin
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Trituration is the _____ means of combining dental alloy and mercury.
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Mechanical
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What material dominates the field of aesthetic restorations?
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Composite
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What materials prepare the teeth for the restoration?
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Bases, bonding agents, & cements
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What type of dental cement cures by a chemical reaction between two materials?
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Self-curing
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What material is used with endodontic spots?
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Self-curing
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What is used to condense the base into place on the floor of the cavity?
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Plastic filling
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What elements are used to evaluate base placement?
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Cover floor of cavity prep, leave enough room for restoration, should not be on pins, & should not be in retentive grooves.
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How many seconds does the cavity varnish dry on the dentin before placing a second layer?
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30
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Where is the cavity liner placed for cavity prep?
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Deepest portion
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What is the reaction of the object to resist external force called?
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Stress
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What cement when mixed exhibits an exothermic reaction?
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Zinc phosphate
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Luting cement that has reached the correct consistency ______.
A. is granular B. is of a putty consistency C. follows the spatula up an inch off the mixing pad. D. forms a ball. |
C. follows the spatula up an inch off of the mixing pad.
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What are the two types of retention?
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Mechanical and chemical
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What 3 ways are dental cements set or cured?
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Self-curing, light-curing, or dual-curing.
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What is the only way zinc oxide eugenol not used?
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Permanent restoration
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What cement has many uses including as permanent cement, pit and fissure sealant, restorative material, & liner and bonding agents?
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Glass ionomer
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What is used as a low strength base or liner, and is slightly irritating, which stimulates secondary dentin to form?
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Calcium hydroxide
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What material is used to improve retention between the tooth structure and the restoration?
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Bonding agents
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What is an example of physical adhesion?
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Dental plaque adhering to the tooth.
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Name the three types of stress and strain.
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Tensile, compressive, and shearing.
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What is it called when two different metals are present in the mouth and there is a potential for the creation of small electrical shocks?
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Galvanism
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What is known as a material's resistance to scratch or indent?
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Hardness
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This means in dentistry as one means by which materials are held in place.
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Retention
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What are the two types of retention?
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Mechanical & chemical retention.
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One includes preparing the walls of the cavity prep to be convergent (slated in), by rou
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This is the process by which materials adhere firmly or hold together.
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Bonding.
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In dentistry, _______ _______ are used to bond the dentin & enamel with restorative materials.
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Bonding agents
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When a material dissolves in fluid it is said to be what?
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Soluble
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A material that is soluble may be useful for what two things?
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Base or liner under a restorative material.
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______ of a material is the ability of liquid to flow.
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Viscosity
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What does DP mean?
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Dentist's Preference
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Dental materials used to restore teeth can be divided into two sections:
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1. Liners, bases, cements, & bonding agents-materials to prepare for the restorative materials.
2. Amalgam, composite, & glass ionomer restorative materials. |
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______ means bonding or cementing together.
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Luting
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This is the term used to describe long-term cementing agent.
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Permanent luting cement
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What is the term for short-term cementing agent?
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Temporary luting cement
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This material lasts for 6 months to a year.
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Intermediate luting cement
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This is applied in a putty or thick layer between the tooth and restoration to protect the pulp from chemical irritation, temperature changes, electrical protection, and mechanical injury.
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Base
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IRM stands for what?
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Intermediate restorative material
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The sedative or ______ material may relieve pain but does not cure the problem.
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Palliative
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This is a thin layer of material that is placed to seal the walls and floor of the cavity prep.
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Varnish
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Varnish goes on what restoration only?
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Amalgams
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This other type of varnish goes under amalgam.
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Copal varnish
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What cement is acidic?
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Zinc Phosphate
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Rick Zink-bitter
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Is Reinforced Zinc Oxide Eugenol temporary or permanent cement?
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Permanenet
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Can ZOE be used under composites or acrylic restorations?
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No, they are not compatible.
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Is ZOE a temporary or permanent cement?
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Temporary. Lasts 6mo-1yr.
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What is one of the main reasons ZOE is used because of it's affect on the pulp?
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It's sedative or soothing affect.
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What is varnish used for?
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Liner
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What does copal varnish go under?
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Amalgam
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What is the brand Di-Cal made from and what is it used for?
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Calcium Hydroxide and it's used for a base or liner because of it's therapeutic effect on the pulp.
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Di Cal, oh yeah!
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Name 5 basic characteristics of ZOE:
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Temporary (6mo-1yr), base, soothing, never used under composit, 3-5 mins.
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temp/perm, base/liner,harsh/non-harsh, can/can't be used under this, time to set up
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Name 4 basic characteristics of Zinc Phosphate:
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Permanent, acidic, base or liner, 5-9 mins.
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Temp/perm, harsh/non-harsh, can/can't be used under, set up time
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Name 2 basic characteeristic of Reinforced ZOE:
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Permanent, base.
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Research more on RZOE
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Name 4 basic characteristics of Polycarboxylate:
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Permanent, base, "kind", 3-5 mins.
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Temp/Perm, base/liner, sweet polly, set up time.
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Name the 4 characteristics of Glass Ionomer:
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Permanent, base & liner, 24 hour set up.
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Temp/Perm, base/liner, set up time.
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Name the characteristics of Calcium Hydroxide:
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Brand Di-Cal, liner, therapeutic affect, 2-7 mins.
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A brand name, base/liner, affect, set up time.
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Name the characteristics of Varnish:
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Liner only
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Copal Varnish contains organic solvents and is only used under what type of restorations?
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Metal
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Varnishes help reduce what?
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Leakage
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Name the 3 basic characteristics of Resin Cement:
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Permanent, 3 types of curing, Brand ReLiX
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What are the 3 types of curings for resin cements?
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Self, light, & dual.
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Is Resin-Reinforced Glass Ionomer a base or a liner?
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Liner
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Compomers are used for what types of dental restorations.
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All types. Light or self cured.
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