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Dental Liners, Bases, and Bonding Systems (Chapter 44)
Terms in this set (62)
to remove all moisture from an item, or to dry out
chemical agent used to prepare a tooth surface for a dental material
Colorless liquid made from clove oil and used for its soothing qualities
material that produces a similar outcome to its natural counterpart
Preventing the passage of heat or electricity
Means by which a material and a structure lock onto one another through minute cuttings.
Removing something completely
Bonding process of two or more monomers
having a soothing effect
Very thin layer of debris on newly prepared dentin
Relating to heat
When would a tooth require extra materials such as a liner, base, varnish, desensitizer, bonding agent or a combination of the five be used?
If the decay has extended into the dentin or has moved close to the pulp, a moderately deep or deep preparation is required.
How long does it usually take for a patient to experience sensitivity and discomfort after the placement of a permanent restoration?
Immediately, a month after or even several months after placement
physical pulpal stimuli
thermal changes from hot and cold or electrical energy created by other metals that come into contact with the tooth
Mechanical pulpal stimuli
include vibrations from a handpiece when the tooth is being prepared, as well as traumatic occlusion which occurs when the person's bite doesn't occlude properly, and added pressure is placed on a specific area of the tooth
Chemical pulpal stimuli
occurs a result of acid materials such as saliva reaching pulpal tissues
Biologic pulpal stimuli
occurs as the result of bacteria from saliva coming into contact with pulpal tissues, or when not all carious tooth structure was removed.
a thin layer of material placed at the deepest portion of the dental preparation to provide pulpal tissue from irritation caused by physical, mechanical, chemical, and biologic elements
frequently selected type of cavity liner
Protects pulp from chemical irritation through sealing abilities
stimulates the production of reparative or secondary dentin
Compatible with all types of restorative materials
What is Dycal?
a dental liner
Dental liners are supplied as:
Two-paste system (base & catalyst), or as a light-cured material.
The function of a dental liner?
provide pulpal protection or dentinal regeneration
Within the cavity preparation, where is a liner placed?
Deepest portion of the dental preparation
How is a dental liner placed?
with a Dycal applicator
is used to aid in sensitivity when placed within the entire preparation
Main ingredient in varnish is:
Varnish is applied using:
a small disposable applicator.
Varnish must be placed:
after the liner.
Characteristics of varnish include:
sealing dentinal tubules, reduces microleakage, forms a barrier that protects tooth from acidic cements such as zinc phosphate.
What products are NOT compatible with varnish?
Composite resins and glass ionomer restorations (both are direct restorations) because the varnish interferes with the bonding and setting reaction.
What is the main ingredient in varnish?
Desensitizer's are also known as"
Primers which are used to prevent hypersensitivity and seal dentinal tubules
Desensitizers are used in place of:
Desensitizers are ideal for use under:
all direct and indirect restorations as no surface layers of preparation need to be prepared.
placed under the permanent restoration when a tooth preparation becomes moderately deep to deep.
Bases are used as a(n)
additional layer in the restoration process used to protect the pulp.
Types of bases used for pulpal protection:
Protective, Insulating, and Sedative bases
Zinc oxide-eugenol (ZOE) is selected for use as a(n)
insulating base and sedative base
Although this material has a soothing effect on painful, irritated pulp, it can not be used under the following materials:
Composite resin, glass ionomers or other resin restorations because eugenol will affect setting process of the resin materials.
Zinc phosphate cement is an excellent material used as a(n):
base because of its thermal insulation qualities. Thermal insulation qualities like dentin
Zinc phosphate contains phosphoric acid, which can be irritating to pulp. This makes is necessary to use a :
cavity liner UNDER the zinc phosphate insulating base
Polycarboxylate cements can be selected as a(n)
base for their protective and insulating qualities.
Polycarboxylate can be placed under what type of restorations?
all direct and indirect because Polycarboxylate is non irritating
Glass ionomer is also utilized as a(n)
characterized by excellent adhesion to enamel and dentin,
liner/base combines light-cure convenience with true glass ionomer fluoride release and bond strength
What products are used to form specialized bases under permanent restorations?
different types of cement
Application of base material has a
putty-like consistency and provides a buffer or layer between the pulp and the restoration.
Entire pulp floor is covered with a base to a thickness of
1 to 2 mm
Dental etchant uses what method to form a chemical bond between the toot and the permanent restorative material:
maleic acid etchant or phosphoric acid etchant on the enamel and/or the dentin to remove the smear layer.
What material does the etchant bond to the enamel and/or dentin?
composite resin, or sealant material
How is dental etchant supplied for use?
liquid or a gel with gel being packaged in a syringe-type applicator.
Dental bonding/adhesion's is important in that
bonding agents work together with acid etched enamel to create mechanical and chemical bonding of restorative materials.
Placement of sealants, the bonding or orthodontic brackets, and the use of resin-bonded bridges are examples of what type of bonding?
Bonding applications are available as:
self-curing, dual-cured, light-cured systems
Dentin bonding differs from enamel bonding in that:
slight amount of moisture must be maintained with dentin bonding to prevent dessication (drying out) of and damage to structure of tooth.
What must be removed from tooth structure for bonding material to adhere to dentin?
Which material is applied first, bonding or etchant?
The following materials are compatable with all direct and indirect restorations:
Calcium Hydroxide (liner), Desensitizer (Primer), Polycarboxylate (base)
Recommended textbook explanations
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