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63 Cards in this Set
- Front
- Back
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What is the most common acrylic monomer? |
Methyl Methacylate |
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When were acrylic resins first used in dentistry? |
1940's |
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What does cross linking do to an acrylic resin? |
Improves the toughness of the material |
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Name three types of resin systems used in dentistry. |
1. Cold cure 2. Heat activated 3. Light activated |
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Complete dentures are held in place by? |
Suction and saliva |
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Porcelain teeth in dentures are rarely used because they ________? |
*Wear the opposing teeth. *Noisy |
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What is the first step in constructing a denture? |
A baseplate and wax rims are constructed |
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What determines the patient's midline? |
*The baseplate and wax rims *Nose |
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When the denture teeth are set in wax it is called the ________? |
"Denture set up" |
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Partial dentures are supported by what? |
Natural teeth and alveolar ridge |
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What part of the partial denture goes around the abutment teeth? |
The clasps |
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How can the fit of an old denture be improved? |
Religning |
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What is an immediate denture? |
It is placed in the same appt. as extractions |
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How can a dental hygienist help keep a denture clean? |
Remove the calculus from it. |
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What is an edentulous atrophic mandible? |
One in which there are no teeth, and the alveolar bone has atrophied. |
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Name three contraindications for implants. |
*Diabetes *Smoking *Patients inability to maintain the implant |
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Name five materials that have been used for implants. |
*Titanium *Apatite-coated titanium *Metals (gold, stainless steel, cobalt alloys) *Ceramics *Polymers |
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What is the most common implant material? |
Titanium |
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Name three types of implants. |
*Endosseous *Transosseous *Subperiosteal |
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Which type of implant is the most commonly used? |
Endosseous |
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Which type of implant has been used to stabilize a mandibular denture? |
Subperiosteal |
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What is osseointegration? |
Attachment of molecules, fibers, cells and tissues to a implant. |
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In preparing the bone for an implant it must not be heated more than _______ degrees F. |
117 degrees F. |
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What are the four stages in placing an implant? |
*Implant *Abutment *Cylinder *Crown |
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Who is responsible for plaque control on the implant? |
The patient |
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Why should not a hygienist use conventional instruments with implants? |
It can damage the implants |
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Name three used of implants in dentistry. |
*Crowns *Bridges *To stabilize dentures w/ the use of precision attachments. |
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The removing of material by a shearing off process. |
Cutting
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The wearing away of a surface. |
Abrasion |
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Producing the final shape and contour. |
Finishing |
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Reducing the sizes of scratches by using a series of finer abrasives. |
Polishing |
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A mild abrasive made of calcium carbonate. |
Chalk |
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An abrasive made of silica like volcanic glass. |
Pumice |
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An abrasive used for metallic restorations such as amalgam. |
Tin oxide |
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A common abrasive used in dentistry on disks, and strips. |
Aluminum oxide |
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The most abrasive material. |
Diamond |
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Used in crown preparations. |
Diamond burs |
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Vehicles used to make pastes from powder. |
Water, alcohol, glycerin |
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Name six factors that affect the rate of abrasion. |
*Hardness *Size *Shape *Pressure *Speed *Lubrication |
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Name four reasons why we polish. |
* Reduce adhesion * To make the surface feel smooth * To increase esthetics * To reduce corrosion |
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Polishing agents may remove _______mm of the fluoride rich layer. |
3-4 |
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Air powder polishing is used to remove? |
*Tobacco stain *Biofilm |
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Name three types of abrasives used in dentifrices |
*Phosphates *Silicas (most popular) *Carbonates |
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What is the most frequently used abrasive in dentifrices? |
Silicas |
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What is the most conservative treatment of discolored teeth? |
Whitening |
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Name six factors that affect the success of whitening teeth. |
*Type and intensity of discoloration or stain *Vitality of the teeth *Whitening technique *Whitening agent and it's strength *Length of exposure of tooth to agent *Presence of a restoration in a tooth |
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Name two types of intrinsic stain. |
*Post-eruptive *Pre-eruptive
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Name three types of post-eruptive stain. |
*Amalgam restorations *Caries *Endodontic treatment |
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Name three types of pre-eruptive stain. |
*Tetracycline stain *Flourosis *Dentinogenesis imperfecta and amelogenesis imperfecta. |
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What is a pre-eruptive stain caused by an antibiotic and difficult to whiten? |
Tetracycline stain |
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Name three types of whitening agents. |
*Hydrogen peroxide *Carbamide peroxide *Sodium perborate |
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What is the strong oxidizing agent that decomposes into water and oxygen. |
Hydrogen peroxide |
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Name two types of whitening techniques. |
*Non-vital *Vital |
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Name two types of non vital whitening. |
*Heat and light activated *Walking bleach |
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What % of hydrogen peroxide is used in walking bleach? |
35% |
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What % of hydrogen peroxide is used in custom trays made by the hygienist? |
2 to 10% |
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Over the counter Crest Whitestrips contain _____% hydrogen peroxide. |
5.3% |
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What is the percentage range of hydrogen peroxide in professional whitening products. |
3 to 14% |
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What is the percentage range of hydrogen peroxide in over the counter whitening strips? |
3 to 7% |
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The use of _______ before and after bleaching may prevent sensitivity. |
Potassium nitrate |
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Patients with anterior restorations must be informed of what before whitening? |
*Whitening is ineffective on those restorations *They must be willing to replace those restorations 1-2 weeks after bleaching. |
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Gingival sensitivity may be reduced by using ______ trays. |
Scalloped trays |
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Over bleaching could be a sign of what disorder? |
BDD - Body Dysmorphic Disorder. |
