Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Dental M - test 2
dental materials test two study flash cards
| Question | Answer |
|---|---|
| _____ is the deterioration of a metal by a chemical or electrochemical reaction | corrosion |
| what material is MOST OFTEN used for a temporary restoration? | ZOE |
| If excess cement is not removed from in and around the gingival margin and sulcus of the tooth, the cement can: | irritate the area and cause inflammation and discomfort |
| An undermixed dental amalgam will appear: | grainy |
| Amalgam has been popular for the restoration of carious teeth because | It is more economical than composites It has excellent physical properties It is easy to manipulate |
| The dental assistant may have the responsibility of placing the mixed cement in a crown. The cement should be loaded | so that a thin layer lines all the walls of the crown |
| what cement undergoes an exothermic reaction during mixing? | Zinc Phosphate |
| An) _____ is defined as a mixture of two or more metals. | alloy |
| Intermediate restorative material (IRM) is a | Zinc Oxide Eugenol Cement |
| What would be the material of choice as an insulating base as well as a sedative base? | Zinc Oxide Eugenol |
| Because ZOE has a neutral pH of 7 and contains eugenol, it is ____ to the pulp | Obtunding |
| A properly mixed amalgam should appear | As a homogenous mass with slight shine |
| Dental amalgam primarily consists of _____. | mercury, silver, copper, and tin |
| Protective bases are placed when it is necessary to protect the pulp before the restoration is placed, because without this protection there may be: | postoperative sensitivity and damage to the pulp. |
| _____ is added to dental amalgam alloy powder to suppress oxidation | zinc |
| What is the most important rule to follow when preparing dental cements | Follow the manufacturer's directions |
| Solid materials are able to maintain their shape and resist external forces. | true |
| The type of stress caused to teeth when biting a hard object, such as a piece of hard candy... | compression |
| The atomic bonding of liquids is stronger than that of gases but weaker than that of solids. | true |
| it is important to understand dental materials biocompatibility to: | Reduce the chance of pain after the placement of a composite restoration Reduce the chance of toxicity Reduce the chance of irritation to the patients gingiva |
| Metallic bonds have the _______ bond compared to ionic bonds and covalent bonds; because of the free movement of ____, metallic bonds conduct heat and electricity | strongest;electrons |
| The ability to transfer an electric current between two dissimilar metals is called___________. | Galvinism |
| When a materials deformation is not permanent and recovers it is considered to have good.... | Elasticity |
| The ingestion of cold and hot fluids and food can cause repeated expansion and shrinkage of a restoration; producing the opening and closing of a gap between the tooth surface and the restoration. This is called _____________. | Percolation |
| The mechanical property of ____ refers to the weight or load applied to an object. | force |
| The basic atom contains protons and electrons within the nucleus and neutrons in orbit around the nucleus | false |
| The ability of a material to dissolve in a liquid refers to: | solubility |
| _______ is the deterioration of a metal by a chemical or electrochemical reaction. | Corrosion |
| ______________ is directly related to the breakdown of most restorative materials. | moisture, acid, and stress |
| If light will pass directly through an object it will be considered: | transparent |
| In dental materials , most materials combine two components consisting of a ________ and ________to form a resulting material. | Catalyst;Base |
| The uncured layer of resin on the surface of bonding agents and composites that allows for additional material to be added without the need for additional etching refers to the | Oxygen Inhibited Layer |
| Enamel bonding is not as strong as dentinal bonding | true |
| Enamel bonding is achieved by micromechanical retention | false |
| Enamel bonding is achieved by resin tags penetration porosities in the enamel and by locking into surface roughness | false |
| Enamel bonding is simpler than bonding to dentin. | false |
| Composite resins are often classified according to their | Filler Particle Size |
| The bonding agent within a composite is | Silane Coupling Agent |
| The acid used most commonly to etch tooth structure for bonding procedures is | Phosphoric |
| The conventional or traditional composites, which contain the largest filler particles and provide the greatest strength, are known as _____ composites | Macrofilled |
| __________ is the excess material that remains on the occlusal margin, sometimes described as feather like? | flash |
| The layer of debris (tooth structure, blood, saliva, etc.), similar to sawdust, created when preparing a tooth is referred to as the ______. | Smear Layer |
| The polymerization shrinkage of a composite | Can be minimized by placing and curing composite in small increments |
| The purpose of the silane coupling agent for composite resins is | To improve the bond between the filler particles and the resin matrix |
Created by:
1371661736
Popular Dentistry sets