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Topic: Abrasion


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  Laboratory Services: Materials Testing
ASTM D968 measures the resistance of organic coatings to abrasion produced by abrasive falling onto coatings applied to a plane rigid surface, such as a metal or glass panel.
Method ASTM D 658 covers the determination of the resistance of organic coatings to abrasion produced by an air blast of abrasive on coatings applied to a plane, rigid surface, such as a metal or glass panel.
Abrasion resistance can be calculated in three ways: as loss in weight at a specified number of abrasion cycles, as loss in weight per cycle, or as number of cycles required to remove a unit amount of coating thickness.
www.trl.com /services/materialstesting/paint_abrasion.html   (408 words)

  
  Abrasion - Wikipedia, the free encyclopedia
Abrasions on elbow and lower arm, still healing.
In dermatology, an abrasion is superficial damage to the skin, generally not deeper than the epidermis.
Mild abrasions do not scar, but deep abrasions may lead to the development of scarring tissue.
en.wikipedia.org /wiki/Abrasion   (116 words)

  
 Corneal Abrasion   (Site not responding. Last check: 2007-10-09)
Abrasions are occasionally visible on sidelighting the cornea.
For large, deep, and painful abrasions, patch the eye with enough pressure to keep the lid closed by folding one eyepatch double to rest against the lid, covering it with a second unfolded eyepatch, and taping both tightly with several strips of 1" tape running from the cheek to mid forehead.
Corneal abrasions are a loss of the superficial epithelium of the cornea.
www.ncemi.org /cse/cse0206.htm   (621 words)

  
 Corneal Abrasion - Definition, Description, Demographics, Causes and symptoms, Diagnosis, Treatment, Prognosis, ...
When a corneal abrasion occurs, the conjunctiva, or the white of the eye, turns red, as new blood vessels form and those present enlarge, in an attempt to increase blood flow to the eye as it attempts to bring to the eye those cells needed for the healing of the cornea.
But if a corneal abrasion is deep and penetrates the next layer of the cornea, then scarring is possible and complete healing of the abrasion may be delayed as long as three months.
The pain of a corneal abrasion can be treated with drugs such as homatropine which keep the eye in a dilated state and stop the spasm of the iris, a major cause of discomfort for the individual with a corneal abrasion.
www.healthofchildren.com /C/Corneal-Abrasion.html   (2107 words)

  
 Handbook of Ocular Disease Management - Corneal Abrasion and Recurrent Corneal Erosion
Symptoms of acute pain and a history of recent trauma are obviously the tell-tale indicators of a corneal abrasion, but the patient may also report photophobia, pain upon extraocular muscle movement, excessive tearing, blepharospasm, foreign body sensation and blurry vision.
Patients with RCE usually present to the office with a history of corneal abrasion in the involved eye, often months or years previously, and a chief complaint of recurrent episodes of ocular pain that may also include foreign body sensation, photophobia, blepharospasm, decreased vision or lacrimation upon awakening or following eye rubbing or eye opening.
For a corneal abrasion, first evert the eyelid and scrutinize the palpebral conjunctiva, ocular surface and fornices to rule out the presence of foreign material.
www.revoptom.com /handbook/sect3f.htm   (1063 words)

  
 [No title]
Abrasion is the scratching or grinding of hard particles into a softer surface.
Grinding abrasion occurs when abrasive particles are ground between two surfaces under pressure, causing the abrasive particles to fracture and be crushed.
Grinding abrasion is different from gouging abrasion by the particle size.
www.postle.com /abrasion.htm   (255 words)

  
 Corneal Abrasion
A corneal abrasion is a scraped, scratched, or torn area of the corneal surface (named the epithelium), usually resulting from an injury such as a finger in the eye, a tree branch, flying glass, or damage from a contact lens.
Corneal abrasion is one of the most common injuries to the eye.
The most common symptoms of a corneal abrasion are redness, pain, blurred vision, excessive tears, sensitivity to light, or a feeling that an object is in the eye.
www.visionrx.com /library/enc/enc_corneabr.asp   (462 words)

  
 Abrasion & Corrosion
Both corrosion and abrasion remove some of the material the pump is constructed of.
Abrasion, however, causes uneven wear that follows the mechanics of the pump.
This material, while able to resist abrasion and corrosion, is a good heat sink, and care must be taken to ensure that the bushing is properly cooled.
www.pumpschool.com /applications/abrasion.htm   (1895 words)

  
 Tooth Abrasion
Tooth abrasion can be defined as the permanent loss of tooth structure that can occur on various tooth surfaces including the cutting surface, outer enamel layer and even exposed root surfaces.
Quick tooth abrasion on the other hand can cause irreversible damage to the pulp and lead to the consequences of tooth abrasion, which not only include crocked teeth but also increased tooth sensitivity, infection and ultimately loss of the tooth.
Each case of tooth abrasion is different and therefore the range of corrective options varies from person to person although the most common treatments include bonding, Cap or a filling to restore the appearance of the tooth.
www.dentalfind.com /glossary/tooth_abrasion.html   (543 words)

  
 Air Abrasion   (Site not responding. Last check: 2007-10-09)
Air abrasion uses the kinetic energy principle, in which the small particles bounce off of the tooth and remove the decay in the process.
While air abrasion is also effective in repairing cracks in teeth, and discolored spots, prepare teeth for cosmetic bonding, it is primarily used to treat small cavities and areas of the teeth and can often be used without local anesthesia.
The advantages of air abrasion are: more of your tooth is preserved, there is little or no discomfort, and usually no numbness is needed, and the procedure is faster.
www.kutschandrenyer.com /abrasion.html   (577 words)

  
 abrasion - Search Results - MSN Encarta
Abrasion, in geology and geomorphology, the mechanical wearing away of a rock surface by friction due to the impact of sediment transported past it...
Caves formed by abrasion commonly consist of myriads of winding tunnels and former underground waterways that show many features analogous to those...
Yardangs are streamlined, often sharp-crested ridges that display a large size range.
uk.encarta.msn.com /abrasion.html   (149 words)

  
 Sock Abrasion Test Methods
The Abrasion Subcommittee has been working to try to reduce the variation in abrasion testing both machine to machine and within machine.
Abrasion testing of a woven fabric is much more repeatable than a knit because woven fabrics tend to be more stable and do not stretch as much as knits.
Initial results are promising, as the variation in number of cycles to sock failure has been reduced from 30% to 7% using Trizact and straight-line abrasion on the sock instead of the random pattern.
www.legsource.com /Hosiery_Consortium_Testing/sock_abrasion.htm   (525 words)

  
 Air abrasion
The air abrasion system creates a cavity surface that is so ideal for use with tooth-colored (composite) fillings, we can place those fillings faster than ever before.
Besides tooth-colored fillings, the air abrasion is very useful in a number of cosmetic procedures such as veneers, inlays and onlays.
Thought the air abrasion procedure will dramatically reduce our overall reliance on the drill, it is not appropriate for every part of every procedure.
www.carey-aylward.com /Services/Air_abrasion/air_abrasion.html   (667 words)

  
 NewsLink Article - Abrasion: Rubbing you the right way   (Site not responding. Last check: 2007-10-09)
While the world at large thinks of "abrasion" as a wearing or grinding away by friction or as an irritation, we who are s/m-aware know that abrasion is an erotic stimulation of the skin by rubbing, scratching, or pricking.
While abrasion may not be very dramatic in presentation (at least, not at first), it is an intense scene, and the Top may choose not to allow any letup in the intensity, although the level of sensation is best varied throughout the scene.
Abrasion can be a light or a heavy scene, or anywhere in between.
www.gmsma.org /newslink/abrasion.html   (828 words)

  
 Corneal abrasion Encyclopedia of Medicine - Find Articles
A corneal abrasion is a worn or scraped-off area of the outer, clear layer of the eye (cornea).
A corneal abrasion is not as serious as a corneal ulcer, which is generally deeper and more severe than an abrasion.
A corneal abrasion is usually the result of direct injury to the eye, often from a fingernail scratch, makeup brushes, contact lenses, foreign body, or even twigs.
findarticles.com /p/articles/mi_g2601/is_0003/ai_2601000365   (614 words)

  
 AGD - What Is Air Abrasion?
Air abrasion, also called "microabrasion" and kinetic cavity preparation, is a method of tooth structure removal considered to be an effective alternative to the standard dental drill.
Air abrasion procedures can leave an accumulation of harmless, dusty particle debris in the patient's mouth, resulting in a gritty feeling that is eradicated by rinsing.
Your dentist may require you to wear protective glasses during the procedure, and a rubber dam may be applied inside your mouth and around the tooth area being treated to serve as a particle barrier.
www.agd.org /consumer/topics/air_abrasion/main.asp   (508 words)

  
 ..About Air Abrasion Technology..
Because air abrasion is most often used on conservative restorations, we may first apply a special cavity detection dye to your teeth to identify the location and extent of decay that might otherwise go undetected by x-rays and visual examinations.
Air abrasion is most often used to remove decay in it's early stages.
While air abrasion offers many benefits, it is not always appropriate for all procedures, such as removing large silver (amalgam) fillings or removing deep decay.
www.drstevendds.com /air_abrasion.htm   (442 words)

  
 Taber Abrasion ASTM D 1044 D 3389 D 4060
Taber abrasion is a test to determine a plastic's resistance to abrasion.
Resistance to abrasion is defined as the ability of a material to withstand mechanical action such as rubbing scrapping, or erosion.
Abrasion can be difficult to compare but haze variation or weight loss are often evaluated.
www.ptli.com /testlopedia/tests/Taber_Abrasion-d1044.asp   (221 words)

  
 Executive Update Online - Creative Abrasion: Ensuring that Board-Executive Relationships Enhance Organizational ...   (Site not responding. Last check: 2007-10-09)
Regardless of structure and approach, though, the potential for abrasion between the board of directors and the hired CEO almost always exists — and that's okay, assuming both parties are doing their respective jobs properly.
The challenge is to ensure that this abrasion leads to creative, positive outcomes that benefit the overall organization.
The ideal is "creative abrasion" that results from boards and executives both doing their respective work properly.
www.gwsae.org /executiveupdate/2004/April/creative.htm   (2246 words)

  
 Abrasion Strips
In 1987, CTI developed an abrasion strip to prevent erosion of the aluminum spar on the 206 main rotor blade.
Also, a nickel abrasion strip has been developed for Bell 206 tail rotors, 412 main and tails, and 212 main and tails.
These abrasion strips extend the life of the blades and reduce DOC by protecting the spar or the underlying abrasion strip.
www.rotorblades.com /sp_strips.htm   (226 words)

  
 InteliHealth:
Corneal abrasions are one of the most common forms of eye injury.
Most corneal abrasions are superficial injuries that involve only the surface layer of the cornea.
Although these abrasions can be very painful, they don't usually cause permanent vision problems.
www.intelihealth.com /IH/ihtIH/WSIHW000/9339/9766.html   (1272 words)

  
 Our Services - Esthetic Restorations - Air Abrasion
Air abrasion is a new wave of dentistry that replaces conventional dental drills in cavity treatment with a fast, quiet and safe beam of particles!
Air abrasion uses the kinetic energy principle, in which particles bounce off the tooth and blast the decay away.
Air abrasion can be used as an alternative to the drill in certain clinical situations.
www.smiletonight.com /ServRestorationsAir.htm   (323 words)

  
 Elcometer Abrasion - www.paintmeter.com - Elcometer ® Distribution
Often referred to as the industry standard the Taber rotary abrasers are written in to many standards throughout the world in many different industries.
This robust and easy to use Abrasion Tester is extremely flexible and is designed to test the washability, brushability and abrasion resistance of a wide range of materials, including paint, laquers, inks, coatings and much much more.
Similar to the Elcometer 1720 Abrasion Tester, above, the Spongeability and Wahability Tester by Elcometer has been designed to test the spongeability and washability of wall coverings / wall papers and can be used in accordance with EN233.
www.paintmeter.com /eng/elco/elco_abrasion.html   (410 words)

  
 Air Abrasion - Advanced DDS - Dr Brian M Raskin — Long Island Dentist - Tooth Decay - Hewlett
Air abrasion is a gentle spray of an air-and powder mix that removes tooth decay.
Since air abrasion is achieved by directing a thin stream of abrasive powder at the area of the tooth decay, your dentist removes only minimal sections of the tooth - only the decayed area.
The air abrasion device that we use instead of the drill is the American Dental Technologies system.
www.advanceddds.com /air_abrasion.html   (371 words)

  
 Air Abrasion Dentistry
One advantage of air abrasion is that you don't hear any noise or feel any vibration.
For instance, air abrasion can't be used for deep fillings, or for veneers, crowns, inlays or onlays.
An air abrasion machine consists of an air compressor and a tank of abrasive aluminum oxide particles that come in two sizes: 27 microns and 50 microns.
www.colgate.com /app/Colgate/US/OC/Information/OralHealthBasics/CheckupsDentProc/CrownsBridges/AirAbrasionDentistryWithoutADrill.cvsp   (425 words)

  
 Air Abrasion
Because air abrasion cuts tooth surfaces with the utmost precision, it removes less tooth than the drill and it reduces the risk of enamel micro-fracturing.
Air abra­sion can't be used as an alter­ native in every procedure.
Ask your dentist if he or she uses air abrasion equipment and if this technique is right for you.
www.oregondentistry.com /cosmetic/page1.htm   (467 words)

  
 Abrasion Testers   (Site not responding. Last check: 2007-10-09)
This abrasion machine consists of a 6" diameter drum; three arms, pivoted at one end, with a mass suspended from the other end; three dial thickness gauges with.001" graduatio
The new Benz DIN Abrader accurately and consistently measures the abrasion resistance of cured rubber compounds, enabling quality control engineers, purchasing agents and researchers to compare and verify the durability of rubber compounds.
It allows the abrasion of compounds up to 40m (36.6 yds.) long, using pretreated sandpaper in an unusual method that prevents the paper from becoming clogged with rubber residue.
www.benztesters.com /abrasion.htm   (360 words)

  
 Sock Abrasion   (Site not responding. Last check: 2007-10-09)
This test method covers the determination of the resistance to abrasion of hosiery garments using the Martindale abrasion tester.
The resistance to abrasion is affected by many factors, such as the inherent mechanical properties of the fibers; the dimensions of the fibers; the structure of the yarns; the construction of the fabrics; and the type, kind, and amount of finishing material added to the fibers, yarns or fabric.
The resistance to abrasion is also greatly affected by the condition of the tests, such as the nature of the abradant, variable action of the abradant over the area of specimen abraded, the tension of the specimen, and the dimensional changes in the specimen.
fp.uni.edu /tapp/sock_abrasion.htm   (1024 words)

  
 Abrasion Resistant Fabrics in wooden Kayak construction including Carbon, Kevlar and other fibers
The material's claim to fame is also its 'abrasion resistance' which coincidentally makes the fuzzy surface very tough to sand and fair smooth.
Good abrasion and impact resistance but the lay-up is epoxy rich and the fabric is rather opaque.
Syntex seems to be a material with Kevlar-like properties (abrasion and puncture resistance) but which wets out as clear as plain fiberglass.
www.oneoceankayaks.com /Abrasion.htm   (1512 words)

  
 Abrasion Resistant Coatings Links on Powder and Bulk Dot Com
Designer and supplier of silicon carbide, alumina and other advanced solutions to problems of extreme abrasion and corrosion in bulk materials handling plants and systems.
Poly Hi Solidur's linings for chutes, bins, bunkers, dump bodies, railcars, etc., are recognized worldwide for their low coefficient of friction and high abrasion and corrosion resistance.
Abrasion and corrosion resistant coatings reduce production cost and increase production.
www.powderandbulk.com /coatings/abrasion.htm   (701 words)

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