title: Bond strength of binary titanium alloys to porcelain.
abstract: The purpose of this study was to investigate the bond strength between porcelain and experimental cast titanium alloys. Eleven binary titanium alloys were examined: Ti-Cr (15, 20, 25 wt%), Ti-Pd (15, 20, 25 wt%), Ti-Ag (10, 15, 20 wt%), and Ti-Cu (5, 10 wt%). As controls, the bond strengths for commercially pure titanium (KS-50, Kobelco, Japan) and a high noble gold alloy (KIK, Ishifuku, Japan) were also examined. Castings were made using a centrifugal casting unit (Ticast Super R, Selec Co., Japan). Commercial porcelain for titanium (TITAN, Noritake, Japan) was applied to cast specimens. The bond strengths were evaluated using a three-point bend test according to ISO 9693. Since the elastic modulus value is needed to evaluate the bond strength, the modulus was measured for each alloy using a three-point bend test. Results were analyzed using one-way ANOVA/S-N-K test (alpha = 0.05). Although the elastic moduli of the Ti-Pd alloys were significantly lower than those of other alloys (p = 0.0001), there was a significant difference in bond strength only between the Ti-25Pd and Ti-15Ag alloys (p = 0.009). The strengths determined for all the experimental alloys ranged from 29.4 to 37.2MPa, which are above the minimum value required by the ISO specification (25 MPa).
authors.affiliation: Department of Oral Rehabilitation and Materials Science, Graduate School of Dentistry, Tohoku University, Sendai, Japan. yoda@mail.cc.tohoku.ac.jp
authors.forename: M
authors.initials: M
authors.lastname: Yoda
authors.forename: T
authors.initials: T
authors.lastname: Konno
authors.forename: Y
authors.initials: Y
authors.lastname: Takada
authors.forename: K
authors.initials: K
authors.lastname: Iijima
authors.forename: J
authors.initials: J
authors.lastname: Griggs
authors.forename: O
authors.initials: O
authors.lastname: Okuno
authors.forename: K
authors.initials: K
authors.lastname: Kimura
authors.forename: T
authors.initials: T
authors.lastname: Okabe
mesh_terms: D003722:Dental Alloys / Q000737:chemistry*; D003776:Dental Porcelain / Q000737:chemistry*; D004548:Elasticity; D006046:Gold; D008422:Materials Testing / Q000295:instrumentation / Q000379:methods; D013329:Structure-Activity Relationship; D013718:Tensile Strength; D013816:Thermodynamics; D014025:Titanium / Q000737:chemistry*
chemical_list: D003722:Dental Alloys; D003776:Dental Porcelain; D006046:Gold; D014025:Titanium