title: Spherical powder for retaining thermosetting acrylic resin veneers.
abstract: 1. Nine different sizes of spherical powder were prepared, and their effectiveness as retentive devices was evaluated against those available commercially. 2. Smaller-diameter spherical powder (No. 5) gave the best results of all retaining devices tested. 3. The physical properties of the resins play an important role in the retentive strength with No. 5 retention beads. The retentive strength was reduced when brittle resin was used. 4. The retentive strength of the resin veneer was greatly affected by the angle of stress at the incisal resin. The retentive strength increased as the angle between the longitudinal axis of the specimen and the direction of stress decreased.
mesh_terms: D000180:Acrylic Resins; D000269:Adhesives; D003722:Dental Alloys; D001840:Dental Bonding / Q000379:methods*; D005026:Ethylene Glycols; D006586:Hexanes; D008689:Methacrylates; D010545:Peroxides; D011208:Powders; D011407:Propane / Q000031:analogs & derivatives; D013696:Temperature
chemical_list: D000180:Acrylic Resins; D000269:Adhesives; D003722:Dental Alloys; D005026:Ethylene Glycols; D006586:Hexanes; D008689:Methacrylates; D010545:Peroxides; D011208:Powders; D011407:Propane