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ch 44
Dental liners, bases, and bonding systems
| Question | Answer |
|---|---|
| Desiccate | To remove all moisture from an item, or to dry out |
| Etchant | Chemical agent used to prepare a tooth surface for a dental material |
| Etching | Process of cutting into a surface with the use of an acid product |
| Eugenol | Colorless liquid made from clove oil and used for its soothing properties |
| Hybrid | Material that produces a similar outcome to its natural counterpart |
| Insulating | Preventing the passage of heat or electricity |
| Micromechanical | Means by which a material and a structure lock onto one another through minute cuttings |
| Obliterating | Removing something completely |
| Polymerize | To subject a material to the bonding process of two or more monomers |
| Sedative | Having a soothing effect |
| Smear layer | Very thin layer of debris on newly prepared dentin |
| Thermal | Relating to heat |
| Physical stimuli | include thermal changes from hot and cold or electrical energy created by other metals that come into contact with the tooth |
| Mechanical stimuli | include vibrations from a handpiece when the tooth is being prepared, as well as traumatic occlusion |
| Chemical stimuli | occur as a result of acidic materials, such as saliva reaching pulpal tissues |
| Biologic stimuli | occur as a result of bacteria from saliva coming into contact with pulpal tissues, or when not all carious tooth structure was removed |
| calcium hydroxide | cavity liner that protects the pulp from chemical irritation through its sealing abilities, stimulates production of secondary dentin, and is compatible with all types of restorative materials |
| cavity liners are placed | only on the deepest dentin surface of the preparation |
| varnish | seals dental tubules, reduces microleakage around a restoration, acts as a barrier to protect the tooth from highly acidic cements such as zinc phosphate |
| varnish is placed | after the liner is applied, within the entire preparation |
| fluoride varnish | gel-like substance is designed to release fluoride on enamel, root structure, and dentin structure. |
| desensitizer | used to prevent or treat hypersensitivity, designed to seal the dentinal tubules, ideal for use under all direct and indirect restorations |
| Most desensitizers contain | hydroxyethyl methacrylate (HEMA) and glutaraldehyde, it is very important that this material is used sparingly, and that no material is allowed to contact soft tissue. |
| insulating bases | placed in a deep cavity preparation to protect the tooth from thermal shock |
| protective bases | placed when it is necessary to protect the pulp before the restoration is placed |
| sedative bases | help soothe a pulp that has been damaged by decay or has been irritated during the process of removing decay |
| zinc-oxide eugenol (ZOE) cannot be used under | composite resins, glass ionomers, or other resin restorations because the eugenol in the liquid will effect the setting process of resin materials |
| zinc phosphate cement | an excellent material to use as a base because of its thermal insulation qualities |
| polycarboxylate cements | non-irritating to the pulp and can be placed under all types of direct and indirect restorations as a base |
| glass ionomer | characterized by its excellent adhesion to enamel and dentin, and its fluoride release |
| dental bonding | aka dental adhesion, is the process of attaining solid and/or liquid contact of one material with another at a single margin |
Created by:
jessicabowersock