(v. t.) To rub or wear off; to waste or wear away by friction; as, to abrade rocks.
(v. t.) Same as Abraid.
Example Sentences:
(1) In addition, the bag does not abrade or desiccate the bowel, potentially reducing serosal injury and adhesion formation.
(2) Finely diffused and abraded amalgam must not be ignored as a source of absorbable mercury.
(3) In some cases the deposits appear to be caused by pulsing the electrode with current, while in other cases the deposits are corroded or abraded from the electrode or are otherwise not associated with the neuroprosthetic functioning of the implant.
(4) Less than 10 TCID50 (50% tissue culture infectious doses) of virus was required to produce large lesions (greater than 5 mm diameter) which developed during a period of 10 to 14 d prior to onset of healing which was complete by 28 to 30 d. A serum neutralising antibody response was also detected and protection against challenge by application of virulent virus to abraded skin was demonstrated in that challenge lesions developed and healed more quickly (14 d against 30 d).
(5) Two simple mechanized procedures have been developed for gently abrading the plant surface in order to efficiently extract glandular enzymes in high purity.
(6) Narrowing of the previously abraded coronary arteries was similar for the diltiazem-treated (median 7.1%, ranges 2.6-29.0%) and the control group (median 10.0%, ranges 2.3-24.1%).
(7) It was formed by electrolytic etching directly after the bonding surface of metal retainer was abraded, preparation of the axial grooves in the edentulous proximal surfaces of abutments, drying with compressed air and drying agent after enamel was acid etched and washed, bonding area was about 49 mm2 in each retainer and without using opaque agent between bonding agent and resin.
(8) Histological examination showed that the diamond fraise left a smooth abraded surface and the wire brush left an uneven surface.
(9) Abraded grooves have been observed on the anterior teeth of all the adults in a small population of prehistoric California Indians.
(10) The difference in infection frequency between quarters with smooth IMD and quarters with abraded IMD was significant (P less than 0.05).
(11) PSL showed no irritancy to both the intact and abraded guinea pig skin at 50% concentration.
(12) Several weeks later, allograft epidermis was abraded and replaced with the keratinocyte cultures.
(13) We used the balloon catheter technique to abrade a defined portion of the lining of the aorta in rats.
(14) Among models in infected quarters, percentage of lumen was lowest and stroma highest in quarters fitted with abraded devices.
(15) These abraded surfaces were compared with SEM micrographs of in-vivo composites surface after 4 years of service.
(16) Microscopically, silicone particles in synovium and lymph node were identical to particles abraded from a new prosthesis.
(17) Sixteen cured samples of each were initially finished with 600-grit paper and then abraded by medium-grit wheels for 30,000 cycles.
(18) High-speed rotational atherectomy uses a diamond-coated, elliptical burr to abrade occlusive atherosclerosis, especially noncompliant calcified plaque.
(19) An air-powder abrasive device abrades cementum rapidly and should be used carefully below cementoenamel junction.
(20) The prominences made of sealants, in particular, were abraded rapidly, one-fifth of retention being left after 3000 removals.
Pumice
Definition:
(n.) A very light porous volcanic scoria, usually of a gray color, the pores of which are capillary and parallel, giving it a fibrous structure. It is supposed to be produced by the disengagement of watery vapor without liquid or plastic lava. It is much used, esp. in the form of powder, for smoothing and polishing. Called also pumice stone.
Example Sentences:
(1) A new method, not previously recommended, involving the use of a green rubber wheel followed by pumice or composite finishing paste was similarly examined and found to come closest to restoring the original, natural enamel surface.
(2) Radiograms of the cranium show a "pumice-stone" appearance of the dome and deformation of the sella turcica.
(3) This layer can be removed by thorough pumicing or by grinding.
(4) Also, fewer bacteria were recovered from vigorously-pumiced, molar-tooth surfaces 24 h after application of albumin compared to buffer-treated controls.
(5) Ragwheels and pumice samples were collected and cultured, the results of which mandate the need for infection control guidelines for the dental laboratory.
(6) Scanning electron micrographs, surface profile tracings, surface roughness recordings, and statistical analysis of data support the finding that the best surface finish is obtained when sandblasting, hard stone, medium abrasive disk, second sandblasting, electropolishing, hard rubber point, hard felt disk with pumice slurry, and felt disk and soft brush with polishing paste are used progressively.
(7) Finishing was done with wet pumice and cup, wet pumice and a brush, a grit rubber polishing point, and an aluminum oxide- coated disc.
(8) Method I consisted of green stone, followed in sequence by finishing bur and pastes of pumice, powdered chalk, and SnO2.
(9) Various abrasive materials, such as pumice, polyethylene, and aluminum oxide are widely used as adjuncts in the therapy of acne.
(10) Pumice and air-powder polishing gave a similar reduction of the sonic scaling roughness.
(11) The occlusal surface was (1) air polished for 20 seconds, (2) cleaned with pumice for 20 seconds, or (3) not cleaned.
(12) All patients received a subgingival scaling and pumice by a hygienist every 6 months.
(13) Test teeth were cleaned with pumice and 10% alcohol, air-dried, and insulated at the approximal surfaces with strips of rubber dam.
(14) Thus, pumicing is a necessary final step with all removal procedures studied.
(15) The mean CO2 output during anaesthesia in paralyzed patients can be monitored by continuous capnographic analysis of the total exhaled gases, the latter being mechanically integrated by pumice canisters.
(16) Food particles (wheat flour, fishmeal or yeast) were ingested approximately 3 times faster than inert particles (kaolin, pumice or synthetic cellulose).
(17) However, when the surface of the etched enamel was pumiced, the enamel reacquired both the shine and appearance of non-etched enamel.
(18) Samples of used dental laboratory pumice from the two dental laboratories were cultured for the isolation of fungi.
(19) A flat enamel surface was obtained with 600-grit silicon carbide paper and cleaned with a rubber cup and a water slurry of fine flour of pumice.
(20) The rubbing application of a hydrochloric acid-pumice mixture has been advocated for the removal of fluorotic-like areas of permanent teeth.