Dental Materials

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Author:
cassiedh
ID:
63852
Filename:
Dental Materials
Updated:
2011-02-03 08:44:53
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ch5keyterms
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Description:
chapter 5 key terms
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  1. to connect or fasten; to bind. items are jointed together at the surface in three main ways; by mechanical adhesion, by chemical adhesion or by a combination of the two
    bond or bonding
  2. the act of sticking two things together. in dentistry the term is used frequently to describe the bonding or cementation process. chemical ______ occurs when atoms or molecules of dissimilar substances bond together. _____ differs from cohesion in which attraction among atoms and molecules of like materials hold them together
    Adhesion
  3. terms used interchangeable to describe the process of preparing the surface of a tooth or restoration for bonding. the most common material is phosphoric acid
    etching or conditioning
  4. a reaction that links low molecular weight resin molecules together into high molecular weight chains that harden or set. the reaction can be initiated by strictly a chemical reaction by light in the blue wave spectrum, by combo of the tow or by heat
    cure or polymerization
  5. ability of a liquid to wet or intimately contact a solid surface. water beading on a waxed car is a poor example of this
    wetting
  6. bonding to dentin that is kept moist after acid etching to facilitate penetration of bonding resins into etched dentin
    wet dentin bonding
  7. a tenacious layer of debris on the dentin surface resulting from cutting the tooth during cavity prep. it is composed mostly of fine particles of cut tooth structure
    smear layer
  8. a low viscosity resin that penetrates porosities and irregularities in the surface of the tooth or restoration created by acid etching for the purpose of facilitating bonding
    bonding agent
  9. an attribute that allows a material to tolerate the presence of moisture
    hydrophilic
  10. an attribute that does not allow a material to tolerate or perform well in the presence of moisture
    hydrophobic
  11. a bonding system that includes etching of both enamel and dentin as a separate step from the application of bonding agents
    total etch system
  12. a bonding system that does not use a separate etching procedure with phosphoiric acid. the acid is contained in the resin primer and no rinsing is needed
    self etch system
  13. a resin/dentin layer formed by intermixing of dentin bonding agent with collagen fibrils exposed by acid etching. it serves as an excellent resin rich layer onto which the restorative material such as composite resin can be bonded
    hybrid layer
  14. leakage of fluid and bacteria that occurs at the interface of the tooth and the restoration margins and is caused by microscopic gaps
    microleakage
  15. movement of fluid in the microscopic gap of the restoration margin as a result of differences in expansion and contraction rates of the tooth and the restoration with temp changes
    percolation
  16. pain caused b movement of pulpal fluid in open dential tubules. actions that cause a change in the pressure on the fluid within the dentinal tubules stimulate a pain response from nerve fibers in the odontoblastic processes that extend into the dentinal tubules from the pulp
    hydrodynamic theory of tooth sensitivity
  17. contact with a substance that changes the chemical or mechanical properties (saliva on tooth after etching and before bonding=fail)
    contamination

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