title: Fit and dimensional changes of cast CP titanium crowns fabricated using sintered molds.
abstract: The present study was undertaken to evaluate the clinical applicability of cast CP titanium crowns fabricated with sintered molds. To this end, the dimensional changes and accuracy of fit of cast CP titanium crowns, manufactured under varying mold firing temperatures, were examined. Molds were fired at 7 temperatures. The outer height of the crown and outer width of the occlusal surface decreased under all sets of firing conditions. The outer width of the cervical part tended to increase at firing temperatures of 1,200, 1,300 and 1,400 degrees C. The inner widths of the occlusal surface and cervical part tended to increase under all sets of firing conditions. In the analysis of the fit of crowns, floating (gained latitude) was observed under all sets of conditions. However, the amount of floating was significantly smaller when the firing temperature was 1,200, 1,300 or 1,400 degrees C than when it was 800, 900, 1,000 or 1,100 degrees C.
authors.affiliation: Department of Geriatric Dentistry, Osaka Dental University, 1-5-17, Otemae, Chuouku, Osaka-shi, Osaka 540-0008, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Inoue
authors.forename: A
authors.initials: A
authors.lastname: Inoue
authors.forename: M
authors.initials: M
authors.lastname: Asai
authors.forename: Y
authors.initials: Y
authors.lastname: Komasa
mesh_terms: D000704:Analysis of Variance; D019245:Compressive Strength; D003442:Crowns; D003734:Dental Casting Investment / Q000737:chemistry*; D003735:Dental Casting Technique / Q000295:instrumentation*; D017267:Dental Prosthesis Design; D006358:Hot Temperature; D006801:Humans; D008422:Materials Testing; D013499:Surface Properties; D013816:Thermodynamics; D014025:Titanium / Q000737:chemistry*
chemical_list: D003734:Dental Casting Investment; D014025:Titanium