title: Casting of MOD inlay using rings with holes on both sides: 12∼18 wt%Au-20∼26Pd-14.48∼26.48Cu-40Ag-1.5Zn-0.02Ir alloys.
abstract: Using a casting ring with openings on both sides and a water-absorbent polymer, heterogeneity is maintained in a single casting and a precise MOD inlay can be produced. We produced 9 different kinds of gold-silver-palladium (Au-Ag-Pd) alloys by changing the ratio of palladium, gold, and copper and investing them, and changing parameters such as the angulation of the casting ring openings and the water:powder ratios to produce MOD inlay castings. We measured the expansion and shrinkage percentage of the castings in both the buccolingual and mesiodistal directions. From this experiment, we learned that precise MOD inlay castings can be produced using rings with 240° openings when invested in a thick mix having a standard water:powder ratio or using rings with 200° openings when invested in a thick mix having a water:powder ratio for a 12 wt%Au-20∼26Pd-20.48∼26.48Cu-40Ag-1.5Zn-0.02Ir alloyes.
authors.affiliation: Department of Dental Materials Science, The Nippon Dental University School of Life Dentistry at Niigata, 1-8 Hamaura-cho, Chuo-ku, Niigata, 951-8580, Japan. kazuo@ybb.ne.jp
authors.forename: Kazuo
authors.initials: K
authors.lastname: Ohkuma
authors.forename: Miku
authors.initials: M
authors.lastname: Kazama
authors.forename: Hideo
authors.initials: H
authors.lastname: Ogura
mesh_terms: D003722:Dental Alloys; D003734:Dental Casting Investment / Q000737:chemistry; D003735:Dental Casting Technique / Q000295:instrumentation*; D006047:Gold Alloys; D006801:Humans; D007284:Inlays; D007495:Iridium; D014867:Water
chemical_list: C120982:Ag-Pd-Cu-Au alloy; D003722:Dental Alloys; D003734:Dental Casting Investment; D006047:Gold Alloys; D014867:Water; D007495:Iridium