title: Sandblasting of inlay margin--marginal abrasion and bond strength.
abstract: Specimens (such as metal inlays) with 30 degrees or 45 degrees marginal bevel were prepared by casting with a 12% Au-Pd-Ag alloy or a gold alloy. A form of the marginal bevel was traced on a profile projector before and after sandblasting, and the length of the abraded margin measured. All the blasting conditions abraded the marginal bevel, while the blasting at 20 mm for 2 seconds brought about the least abrasion of approximately 10 microm in the 45 degrees specimen cast with Au-Pd-Ag alloy. The gold alloy specimens were abraded more than the Au-Pd-Ag alloy ones; those with marginal bevel of 30 degrees were abraded more than those of 45 degrees. On the other hand, the effect of different blasting conditions on the bond strength of units bonded with resin cement was evaluated (under selected blasting conditions known to cause relatively less damage to the marginal level). Specimens treated by sandblaster exhibited a comparable tensile bond strength, while specimens without sandblasting but applied with only an alloy primer showed a statistically low value.
authors.affiliation: Division of Cariology, Department of Developmental and Reconstructive Medicine, Course of Medical and Dental Science, Graduate School of Biomedical Science, Nagasaki University, 1-7-1, Sakamoto, Nagasaki City, 852-8588, Japan. ohsawa@net.nagasaki-u.ac.jp
authors.forename: Masahiro
authors.initials: M
authors.lastname: Ohsawa
authors.forename: Haruka
authors.initials: H
authors.lastname: Yokota
authors.forename: Yoshihiko
authors.initials: Y
authors.lastname: Hayashi
mesh_terms: D020906:Air Abrasion, Dental; D000704:Analysis of Variance; D003722:Dental Alloys; D001840:Dental Bonding; D003775:Dental Polishing / Q000379:methods*; D003799:Dental Stress Analysis; D006047:Gold Alloys; D007284:Inlays; D019279:Resin Cements; D013718:Tensile Strength
chemical_list: C477623:AuPdAg alloy; D003722:Dental Alloys; D006047:Gold Alloys; D019279:Resin Cements