title: Polymerization shrinkage, impact strength and roughness of montmorillonite-modified denture base resins.
abstract: Montmorillonite (MMT) was added to two commercial denture base resins, Lucitone (LU) and Accelar (AC) in amounts varying from 0-8 weight percent (wt%). The linear polymerization shrinkage, impact strength and average roughness or polishability were measured after specimens were processed using standard methods. The linear polymerization shrinkage was 1.37 and 1.02% for the unmodified denture base resins and the impact strength was 37.36 and 20.02 J/m; while the average roughness after polishing was 0.026 and 0.047 microns for LU and AC, respectively. The addition of MMT significantly (P less than 0.05) reduced the linear polymerization shrinkage and impact strength, while increasing the roughness of LU and AC.
authors.affiliation: Department of Dental Materials, Baylor College of Dentistry, Dallas.
authors.forename: S M
authors.initials: SM
authors.lastname: Collard
authors.forename: A
authors.initials: A
authors.lastname: Karimzadeh
authors.forename: L T
authors.initials: LT
authors.lastname: Smith
authors.forename: U
authors.initials: U
authors.lastname: Parikh
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry*; D000704:Analysis of Variance; D001546:Bentonite / Q000737:chemistry*; D003819:Denture Bases; D008422:Materials Testing; D011109:Polymethacrylic Acids; D013499:Surface Properties
chemical_list: D000180:Acrylic Resins; D011109:Polymethacrylic Acids; D001546:Bentonite; C030613:polymethacrylic acid; C040291:Lucitone