dental materials midterm review 1

• what is the smear layer

  a tenacious surface layer of debris resulting from cutting the tooth during caviety preperation
• what is biofilm 


  a complex community of oral microorganisms living on surfaces within the mouth
• what is splatter 


  small particals that may contain blood, saliva, or al particulate matter, water and microbes
• what is corriosion 


  detiroration of a metal caused by a chemical attack or electrochemical reaction with dissimilar metals in the presance of a solution containing electrolytes
• what is conditioning 


  term used to describe the process of preparing the surface of a tooth or restoration for bonding
• what is polymerization 


  the joining of monomers end to end form chains of networkof polymers often causing a MATERIAL to HARDEN
• what is percolation 


  movement of fluid into and out of the microscopic gapof the restoration margin as a result of differences of EXPANSION and contraction rates of the tooth and the restoration with temperature changes
• what is bio-aerosol


  a cloudlike mist containing droplets , tooth dust, dental material dust, and bacteria of a partical size less then 5 microns in diamiter
• what is galvaism 


  an electric current transmitted between two dissimilar metals in a solution of electrolytes
• what is theraputic material 


  materials used to treat disease
• what is the hybrid layer

  a resin dentin layer formed by intermixng of the dentin agent with collagen fibrils exposed by acid etching and the etched dentin surface
• what is thixotropic 


  a charicteristic of some gels and liquids that will flow more readily under mechanical force such as mixing, stirring or shaking
• what is viscosity 


  the ABILITY of a liquid material to RESIST FLOW
• what is microleakage 


  leakage of fluid and bacteria that occurs at the interface of the tooth and the restoration margins and is caused by microscopic gaps
• what is the inital set time

  coincides with the end of the working time and is the time in which the MATERIAL CAN NOT BE MANIPULATED IN THE MOUTH
• Carver


  Used with a light touch to remove the gross excess of the dental material on the occlusal surfaces and margins on the proximal surfaces
• Bioactive Dental Materials


  Materials that are used to remineralize and repair dentin
• Organic Resin Matrix


  Thick liquids made up of two or more types of organic molecules that form a matrix around filler particles
• Implant abutment


  Metal or ceramic component that connects the implant crown to the implant fixture
• Provisional coverage


  A restoration that temporarily takes the place of a permanent restoration, typically for up to 2 to 4 weeks
• Triturator


  Mechanical device used to mix materials produce amalgam
• Condenser


  Used to carefully work the dental material into all of the corners and retentive areas of the cavity preparation
• Prosthesis


  A device used for the replacement of missing teeth and/or soft tissues
• Osseointegration


  Bone growing into intimate contact with an implant fixture during the healing phase
• Alloy


  A mixture of two or more metals
• CALCIUMHYDROXIDE


  This material promotes tertiary or reparative dentin
• BLUELIGHT


  This is used to cure some dental materials that are light sensitive
• CONDENSER


  Used to pack the amalgam vertically and laterally into the prepared tooth
• HYBRID


  This layer helps to prevent microleakage
• ETCHING


  Also known as tooth conditioning
• TRANSOSTEAL


  Inserted through the inferior border of the mandible
• MASK


  When you wear a face shield you must also wear a
• MICROLEAKAGE


  Microscopic openings between the tooth and the restoration will cause
• OSSEOINTEGRATION


  Bone attaches to the implant
• IMPLANT


  This screw is placed directly into the alveolar bone
• TITANIUM


  Implants are made of this
• CLASS V


  This class of restoration would be found at the gingival margin on the buccal or lingual of any tooth
• WET


  What technique is used when restoring a tooth with a bonded amalgam
• PRR


  Flowable composite may be used in this type of restoration
• THREE


  This classification of cavity includes the interproximal area of an anterior tooth