title: Wear of combinations of acrylic resin and porcelain, on an abrasion testing machine.
abstract: Wear tests of various combinations of acrylic resin and porcelain were made using a machine which was designed to test materials under conditions similar to those of masticatory function by simulating the loads, sliding distances, and contact times encountered in the human masticatory cycle. The results showed that the amount of wear of the two materials worn in combination depended on the nature of the surrounding medium and on the surface roughness of the opposing material. Acrylic resin showed good wear resistance provided no third party abrasive or opposing hard, rough surface was present. When a mild abrasive was incorporated in the system, the acrylic resin vs acrylic resin combination wore almost seven times more than porcelain vs porcelain. Clinical experience would suggest that this is a reasonably sound order of wear.
mesh_terms: D000180:Acrylic Resins; D002130:Calcium Phosphates; D002244:Carbon; D002266:Carboxymethylcellulose Sodium; D003776:Dental Porcelain; D003799:Dental Stress Analysis; D011756:Diphosphates; D012825:Silicon; D013314:Stress, Mechanical; D013499:Surface Properties; D014867:Water
chemical_list: D000180:Acrylic Resins; D002130:Calcium Phosphates; D011756:Diphosphates; D014867:Water; D003776:Dental Porcelain; D002244:Carbon; D002266:Carboxymethylcellulose Sodium; D012825:Silicon