Radiology week ten
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The radiographic appearance of restorations, materials, and foreign objects varies depending on what 3 things?
- thickness of material
- atomic number
absorbs x-rays, and as a result, very little, if any, radiation comes in contact with the film and the structure appears radiopaque.
What are 3 examples of nonmetallic restorations?
of the nonmetallic restorations, which is the most dense and least radiolucent? And which is the least dense and most radiolucent?
the most common restorative material used in dentistry, absorbs the x-ray beam and prevents x-rays from reaching the film and appears radiopaque; it is seen in a variety of shapes, sizes, and locations on a radiograph
pit amalgams, appear as distinct, small, round or ovoid radiopacities
one surface amalgam
larger amalgam restorations that appear radiopaque and are characterized by their irregular outlines or borders
multisurface amalgam restorations
extensions of amalgam seen beyond the crown portion of a tooth in the interproximal region
amalgam that is inadvertently embedded in adjacent soft tissue during the restoration of a tooth. scraps that vary in size and shape and appear as dense radiopacities with irregular borders
gold and amalgam appear equally_____________on a radiograph
How do you tell the difference between gold and amalgam restorations?
gold restorations usually have smooth borders and a smooth marginal outline
appear as large radiopaque restorations with smooth contours and regular borders
gold crowns, bridges, and inlays and onlays
appear as small round radiopacities on a dental radiograph and are indistinguishable from the one-surface amalgam restorations
gold foil restorations
prefabricated restorations that are usually used as interim or temporary restorations. thin and do not absorb dental x-rays to the extent that gold and amalgam do
stainless steel and chrome crowns
What type of problems can stainless steel and chrone crowns cause in the mouth? And why?
- periodontal problems such as:
- food impaction
- gingival bleeding
- bone loss
- because they are not contoured with the shape of the toothe
these types of restorations aare prefabricated and usually temporary
stainless steel or chrome crowns
restoration that is slightly radiopaque and resembles dentin
What are 2 types of porcelain restorations?
- all-porcelain crowns
- porcelain-fused to metal (PFM) crown
appear slightly radiopaque on a radiograph, a thin radiopaque outlining of the prepared tooth may be evident, and thin line represents cement
has 2 radiographic components, metal and porcelain
can be seen in endodontically treated teeth. Cast metal and appears as radiodense as amalgam or gold. Appear radiopaque on a radiograph. _____________resembles the crown portion, ________________extends in the pulp canal
- post and core restoration
may vary in radiographic appearance depending on the composition of the material.
how can you tell if there is a question between if it is a composite restoration or a carie on a radiograph?
through careful visual and digital examination of the tooth
used as temporary crown or filling, this is the least dense of all nonmetalic material, and appears radiolucent or barely visible on a dental radiograph
zinc phosphate cement
zinc oxide eugenol paste
are examples of?
base materials used as cavity liners to protect the pulp and nerve and calm the tooth
placed on the floor of a cavity preparation and a restorative material is placed over it, appears radiopaque, but it appears less dense compared to amalgam
used to enhance the retention of amalgam or composite appear cylindrical or screw shaped
a clay like material used in endodontics therapy to fill the pulp canals, appears radiopaque, similar to density in base material, not as radiopaque as metallic restorations
used in endodontics therapy to fill pulp canals, appear very radiopaque similar to metallic restorations
true or false. patients should be instructed to remove all complete and partial dentures before radiographs are taken.
what are 3 material used in complete dentures?
- diatorics (metal)
what are 3 materials used in removable parital dentures?
- cast metal
if this is not removed before the exposure of a dental radiograph, it looks like rootless or "floating" teeth
teeth on this are composed of acrylic or porcelain. porcelain teeth appear radiopaque and resemble dentin, acrylic teeth appear fainlty radiopaque or radiolucent, metal claps are seen on this
on partial denture
What are 4 materials used in orthodontics?
- fixed retainers
What are 5 materials used in oral surgery?
- suture wires
- metallic splints and plates
- bone screws
- stabilizing arches
what are 3 miscallaneous objects that might be seen and interupt a radiograph?
- napkin chain
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