Dental Materials Ch. 11-13 worksheet

The benefits of a properly finished and polished restoration/prosthesis include:

1. Decrease biofilm retention 2. Resistance to tarnish and corrosion 3. Increase longevity of the restoration 4. Improved esthetics 5. Decrease attrition on natural tooth surface 6. Improved ____________ surrounding tissues

The correct order for application of the porcelain layers during the creation of a porcelain-bonded-to-metal crown is:

1. Opaque 2. Body 3. Incisal

Implants are of three main types:

1. Subperiosteal 2. Endosseous 3. Transosteal

Prophy paste may be ______________________ more abrasive to dentin and __________________ more abrasive to enamel than commercially prepared dentifrice.

20 times// 10 times

Noble dental casting alloys do not require any gold but must contain at least ________________noble metals by weight.

25%

During a two-stage endosseous surgical implant placement procedure, the healing abutment is placed about _______________ following placement of the implant fixture.

3 months

The patient should return to the dental office at __________________________ intervals for routine implant assessment and maintenance.

3-4 months

The success rate of dental implants is more than __________ with careful case selection.

90% maxillary/ 95% mandibular

The ____________________________agents found in dentifrices improve the efficiency of the toothbrush in the removal of stains, food debris, and biofilm.

Abrasive

Microabrasion can be used to remove minimal amounts of tooth structure and utilizes _______________________________ powder; it is not recommended for stain removal.

Alumminum oxide

Failure of the implant that occurs after the initial integration is often caused by:

Bacterial infection

The primary base metals used in casting alloys are:

Chrome-cobalt Nickel-chrome

The purpose of a post is to retain the _____________________________ over which the final restoration (crown) is placed.

Core build up

Fine-particle _____________________ are supplied in a paste for polishing composite and porcelain restorations.

Diamonds

The _______________________ implant is the most commonly used in dentistry today.

Endosseous

The higher the _____________________ number of a gold solder, the higher the gold content and the lower the melting point of the solder.

Fineness?

Rubber cup polishing removes some of the ______________________ layer of enamel.

Fluoride

The purpose of approved denture cleansers is to:

Freshen the acrylic, loosen stain, and plaque w/o abraiding the denture material

To make room for the metal substructure and porcelain, porcelain fused to metal crowns require ______________________reduction of the tooth than all-metal crowns.

Greater

An _________________________________ surgical procedure means that the implant fixture is placed directly into the new socket when the implant procedure involves the extraction of a tooth.

Immediate loading

Abrasive particles that are ________________ and _______________________ will cut more efficiently.

Large & Irregular

When using hand instruments for __________________________________, use very sharp instruments and begin apical to the margin of the restoration, using a shaving motion in diagonal overlapping strokes.

Margination

Tin is often added to the solder to___________________ the melting range and improve the flow of the molten metal.

Material

______________ is the base metal that has the highest incidence of allergic response.

Nickel

If polishing of a dental implant is deemed necessary, ___________________ in a rubber cup applied with light pressure may be used.

Non-abrasive polishing paste

_____________________ increases the hardness of the alloy and is widely used because it has good corrosion resistance and is less expensive than gold.

Palladium

Abrasive wear of tooth structures in contact with ______________________ restorations is a problem for many patients because it is harder than enamel and dentin.

Porcelain

The most esthetic margin for a ceramic-metal crown is the ___________________________________.

Porcelain facial margin

____________________ is a major component of many prophylaxis pastes used to polish tooth structure, dental amalgam, and acrylic bases.

Pumice

The philosophy of ______________________________ polishing is regarded as the most appropriate approach in the selection of which teeth and surfaces to polish.

Selective

_______________________ solders are used primarily in dentistry to solder fixed-space maintainer components and to solder wire components to removable orthodontic appliances.

Silver solder

Although __________________ is considered to be a precious metal, it is not considered noble because of its corrosion in the oral cavity.

Silver precious metal

Air polishing utilizes a combination of ________________________________________, air, and water at a pressure of approximately 40 psi as an effective and efficient means of removing stains and soft deposits from enamel surfaces.

Sodium bicarbonate

Predetermined holes in the ________________ allow the surgeon to cut a hole into bone for the implant at the correct angulation.

Stent

Close adaptation of ________________________ epithelium to the implant surface helps develop a biological seal that prevents microorganisms from invading the tissues.

Sulcular

The metal most commonly used for dental implants is ___________________________.

Titanium

Proper finishing, polishing, and cleaning of tooth structures and restorative materials:

Using sequentially finer and finer abrasives on a surface to first contour, then smooth and bring luster to a surface

_____________________________metal has the characteristic of being able to be heat-modified, or annealed, to create differing resistance to deformity.

Wrought