Apparatus and methods for testing the polishability of...

G - Physics – 01 – N

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G01N 3/00 (2006.01) G01N 3/24 (2006.01) G01B 5/28 (2006.01)

Patent

CA 2738811

A method and apparatus for measuring the polishability of a solid material such as a dental restorative material in-cludes using a series of apparatus to perform the steps of forming the material into a desired specimen with a generally planar sur-face, conditioning the surface by abrasion, measuring the abraded surface with a profile determination device, optionally measur-ing the amount of material abraded from the surface and the gloss of the abraded surface, polishing a portion of the abraded sur-face with a polishing device at a controlled load for a pre-determined time and measuring the roughness and/or gloss of the pol-ished surface followed by comparison thereof to the corresponding measurements of the unpolished, conditioned portion of the specimen surface. Polishing materials and devices may also be tested using the apparatus and method for polishing a standardized material.

La présente invention concerne un procédé et un appareil destinés à mesurer la capacité dun matériau solide à être poli, tel quun matériau de restauration dentaire, comprenant lutilisation dune série dappareils pour effectuer les étapes de mise en forme du matériau en un spécimen souhaité ayant une surface généralement plane, le conditionnement de la surface par abrasion, la mesure de la surface abrasée avec un dispositif de détermination du profil, éventuellement la mesure de la quantité de matériau abrasé de la surface et de la brillance de la surface abrasée, le polissage dune partie de la surface abrasée avec un dispositif de polissage avec une charge contrôlée pendant un temps prédéterminé et la mesure de la rugosité et/ou de la brillance de la surface polie suivie de la comparaison de celle-ci avec les mesures correspondantes de la partie conditionnée non polie de la surface test. Les matériaux et dispositifs de polissage peuvent également être testés en utilisant lappareil et le procédé de polissage dun matériau standard.

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