Distortion of alloy by sandblasting.
OBJECTIVE
To measure distortion of alloy plates caused by sandblasting, and to determine the influence on degree of distortion of type of alloy, plate thickness, and sandblasting conditions i.e. particle size of alumina, air pressure, and duration of blasting period.


METHODS
Plates were cast in a noble alloy and in a Co-Cr alloy. One end of the plates was fastened in a device, and the projecting 20 mm of the plates was sandblasted. Distortion was determined as the deflection of the plates at a distance of 20 mm from the mounting device.


RESULTS
The mean deflections varied between 0.37 mm and 1.72 mm. Plates of Co-Cr alloy showed less deflection than did plates of noble alloy. Deflection was increased by an increase in duration of the blasting, pressure, particle size of the alumina, and by a decrease in plate thickness.
Peutzfeldt
A
A
Department of Dental Materials, School of Dentistry, University of Copenhagen, Denmark.
Asmussen
E
E
D000704:Analysis of Variance; D055598:Chemical Phenomena; D002627:Chemistry, Physical; D002858:Chromium Alloys / Q000737:chemistry; D003722:Dental Alloys / Q000737:chemistry*; D001840:Dental Bonding / Q000379:methods*; D008422:Materials Testing / Q000379:methods / Q000706:statistics & numerical data; D013499:Surface Properties
D002858:Chromium Alloys; D003722:Dental Alloys