What's the difference between abrasive and corundum?

Abrasive


Definition:

  • (a.) Producing abrasion.

Example Sentences:

  • (1) This resulted in greater uniformity of abrasion over the enamel surface within the biopsy window area and better operator handling characteristics.
  • (2) Shaping and fine working of restorations necessitated by cervical lesions, abrasions at the necks of teeth, or root surface caries can often be arduous to complete.
  • (3) The row between two of the media industry's most colourful and abrasive figures took place in the YouView boardroom, located at Desmond's Northern & Shell Thameside skyscraper.
  • (4) Abrasive brushing techniques wear down the already damaged tooth surfaces.
  • (5) Orthopedic new approaches to therapy of OA include removal of abnormal tissue to stimulate repair (e.g., burring, abrasion) and grafting (e.g., osteochondral grafts, perichondrium, periosteum) to the subchondral bone.
  • (6) Before we meet, I have to have a stern talk with myself about not mentioning the game last August in which all Arsenal fans will contend that Barton got new signing Gervinho sent off on his debut; he's had similarly abrasive encounters since with fellow midfielders, Karl Henry from Wolves and Norwich's Bradley Johnson, the latter earning him a three-match ban.
  • (7) Elevated risks for stomach cancer among carpenters and machinists may reflect exposure to dusts, abrasives, and cutting oils.
  • (8) The testing was based on The British Standards Institution's specification for toothpastes, using a profilometer technique to evaluate the abrasion.
  • (9) Creation of smear layers with abrasive paper or dental burs reduced permeability by 80-85%.
  • (10) Since prosthetic meniscal replacement may be performed in the setting of normal articular cartilage, a prosthesis will be required to match the exact joint configuration, induce the same lubricity, produce the same coefficient of friction, and absorb and dampen the same joint forces (without incurring significant creep or abrasion) as does the normal meniscus.
  • (11) The titanium alloy strips were treated with citric acid, stannous fluoride, tetracycline HCl, chlorhexidine gluconate, hydrogen peroxide, chloramine T, sterile water, a plastic sonic scaler tip, and an air-powder abrasive unit.
  • (12) Perhaps grime and dubstep were simply too abrasive and strange to be successfully watered down for mainstream tastes.
  • (13) Relief from pain occurred in all patients soon after abrasion was performed.
  • (14) After mechanical denudation of the endothelium with a specially designed abrasive micropipette, spontaneous tone and myogenic responses were preserved.
  • (15) An abrasively Thatcherite style would be poison to their Lib Dem partners.
  • (16) Current management of hand injuries includes debridement by abrasive scrubbing with anti-bacterial detergents, surgical excision, or pressure irrigation.
  • (17) Plaque accumulations were also frequently located in abrasion grooves and surface pits in the enamel, and prolific plaque areas were consistently surrounded by a monolayer of bacterial cells.
  • (18) Corneal abrasion occurred in two babies and corneal oedema in one baby after forceps delivery but in none of the control group.
  • (19) However, person-to-person variation can have a great influence on the abrasion process; moreover, only two persons were involved in this pilot study, and no definitive statement can be made about the effect of the toothpastes.
  • (20) Recently a redesigned air-powder abrasive system was introduced to remove dental plaque and stain from tooth surfaces.

Corundum


Definition:

  • (n.) The earth alumina, as found native in a crystalline state, including sapphire, which is the fine blue variety; the oriental ruby, or red sapphire; the oriental amethyst, or purple sapphire; and adamantine spar, the hair-brown variety. It is the hardest substance found native, next to the diamond.

Example Sentences:

  • (1) Guinea pig splenic lymphocytes and peritoneal macrophage cultures were incubated with quartz (DQ12), Corundum and aspirin as prostaglandin inhibitor.
  • (2) 3M discs and the rough corundum discs caused significantly more surface roughness of the Cosmic surface.
  • (3) The maximum values of tensile strength were measured when 200-250 microns corundum was used.
  • (4) Experiments carried out over a long period have shown that corundum ceramic is a strong material and is biologically inert.
  • (5) At desired time of incubation, the bacteria were washed with water, disintegrated with powdered corundum and in resulting cell-free extracts L-asparaginase activity was determined by the Conway method.
  • (6) Corundum produced no significant effect on the enzyme activity.
  • (7) The results showed that quartz induced a substantial increase of lipid peroxide in PAMs compared with both samples (dust-free or exposed to corundum).
  • (8) No adverse effects of corundum ceramics were noted.
  • (9) Corundum, which is sapphire, is number nine.” “The relative hardness of sapphire is 400, compared to quartz which is 100, so it is a lot harder than quartz,” Alford stressed.
  • (10) The results were compared with quartz dust as the known fibrogenic dust and emery dust (Corundum) was used as a control dust.
  • (11) Raman spectroscopy showed that both the socket and the beads are composed of alpha-Al2O3 (corundum), while the bioactive glass (alkaline and alkaline earth alumosilicate with a small quantity of zirconium oxide) showed this to have an intermediate structure between that of vitreous silica and that of the alkaline and alkaline earth disilicate glasses.
  • (12) All the lungs contained quartz and silicates and in most of the necropsy cases carborundum and corundum could also be shown.
  • (13) Quartz treatment did not alter esterase activity whereas corundum exposed cultures showed a decline.
  • (14) NH, a producer of glucoamylase, were cultivated in the presence of various supporting materials (three microspherical zeolitic particles, alpha-alumina and foam corundum).
  • (15) The results obtained showed that a significant inhibition of antibody formation to human albumin took place in animals with experimental silicosis in comparison with control rats that were given physiological saline or corundum as established by passive haemagglutination reaction according to Boyden as well as enhancement of the intensity of the delayed-type hypersensitivity to tuberculin.
  • (16) A complex of implanted dentures was manufactured with a corundum ceramic compound "Kador" made in the USSR.
  • (17) According to the present in vitro study it is possible to bond NPM alloy restorations with Panavia Ex several days after air brushing with corundum.
  • (18) Implants of corundum ceramic have been used in the treatment of 38 patients with bony tumours of the limbs.
  • (19) The patient's spine has been fixed by means of implant, made of corundum porous ceramic, metal plate and lavsan band.
  • (20) The values of the R(a) and Rmax were grown proportionally with the grain of corundum, but it was not resulted in the same increase of the tensile strength.

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