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To assess the dimensional stability of 8 impression materials over 12 weeks relevant to in vitro tribology studies.Ten impressions from eight impression materials were taken of a metal block (ADA block) conforming to the American Dental Association specification for impression materials and of another metal block (custom block) which allowed measurements over a larger surface area. The impressions...
To analyze differences in the way dental materials digitize on a non-contacting laser profilometer (NCLP).Three Type IV dental stones and 15 impression materials were mixed according to the manufacturer's instructions and expressed against a glass block to record its surface characteristics. From each material an area of 6×40mm was scanned on the NCLP and the Ra, Rq and Rt roughness values measured...
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