Mould filling of Ag-Pd-Cu-Au and Ag-Zn-Sn-In alloy castings made using a rapidly prepared gypsum-bonded investment material.
Mandibular premolar-shaped wax patterns of full crowns with a marginal angle of 300 were prepared. Two semiprecious alloys were cast using a rapidly prepared gypsum-bonded investment material or a conventional gypsum-bonded investment. A precise impression was taken and cut into four segments. Scanning electron microscopy was used to evaluate the mould filling of each segment. The mould filling of the silver-palladium-copper-gold alloy was worse than that of the silver-zinc-tin-indium alloy. The mould filling of both alloys cast with the rapidly prepared gypsum-bonded investment material was superior to that using the conventional investment.
Shimizu
Hiroshi
H
Department of Oral Rehabilitation, Fukuoka Dental College, Fukuoka, Japan. simizuh1@college.fdcnet.ac.jp
Inoue
Shoko
S
Miyauchi
Hideaki
H
Watanabe
Kouichi
K
Takahashi
Yutaka
Y
D001641:Bicuspid; D002133:Calcium Sulfate / Q000737:chemistry*; D003300:Copper / Q000737:chemistry; D003722:Dental Alloys / Q000737:chemistry*; D003734:Dental Casting Investment / Q000737:chemistry*; D003735:Dental Casting Technique / Q000295:instrumentation*; D003761:Dental Impression Technique / Q000295:instrumentation*; D003764:Dental Materials / Q000737:chemistry*; D006047:Gold Alloys / Q000737:chemistry; D006358:Hot Temperature; D006801:Humans; D007204:Indium / Q000737:chemistry; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D010165:Palladium / Q000737:chemistry; D012834:Silver / Q000737:chemistry; D013499:Surface Properties; D013997:Time Factors; D014001:Tin / Q000737:chemistry; D019231:Tooth Preparation, Prosthodontic; D015032:Zinc / Q000737:chemistry
D003722:Dental Alloys; D003734:Dental Casting Investment; D003764:Dental Materials; D006047:Gold Alloys; D007204:Indium; D012834:Silver; D010165:Palladium; D014001:Tin; D003300:Copper; D015032:Zinc; D002133:Calcium Sulfate