thiouracil and silicon-carbide

thiouracil has been researched along with silicon-carbide* in 2 studies

Other Studies

2 other study(ies) available for thiouracil and silicon-carbide

ArticleYear
Effects of metal primers on the bonding of an adhesive resin cement to noble metal ceramic alloys after thermal cycling.
    The Journal of prosthetic dentistry, 2011, Volume: 106, Issue:6

    Although the effectiveness of primers for resin bonding to noble alloys has been demonstrated, no effective clinical technique for bonding to noble metal ceramic alloys has been established.. The purpose of this study was to evaluate the effects of metal primers on the shear bond strength of an adhesive resin to noble metal ceramic alloys after thermal cycling.. Sixty-three disk-shaped specimens (10 × 2.5 mm) were cast from high-gold-content alloys (Super Metal W-85: W85 or IFK88 GR: IFK88), a high-palladium-content alloy (Super Metal N-40: N40), and an Ag-Pd-Cu-Au alloy (Castwell M.C.12: MC12). Smaller-sized disk-shaped specimens (8 × 2.5 mm) were fabricated with MC12. Bonding surfaces were finished with 600-grit SiC-paper and airborne-particle abraded with 50-μm alumina. Pairs of disks were primed (V-Primer: VP; ML Primer: ML; or Metaltite: MT) and bonded with an adhesive resin (Super-Bond C&B). The bond strengths were determined before and after 20,000 and 50,000 thermal cycles (n=7). Data were analyzed by using a 3-way ANOVA and the Bonferroni test (α=.05). Failure modes were determined by optical microscope and SEM observation.. Bond strengths to high-gold-content alloys with VP and MT significantly decreased after the thermal cycling (P<.001). Bond strengths to W85 (35.27 ±4.25 MPa) and IFK88 (33.57 ±3.56 MPa) after 50,000 thermal cycles obtained by ML were the highest (P<.001), and these groups showed combination failures. Bond strengths to N40 significantly decreased after 50,000 thermal cycles (P<.001), regardless of primers.. Shear bond strengths (SBS) to high-gold-content alloys were not degraded up to 50,000 thermal cycles when primed with ML. None of the primers evaluated was effective for high-palladium-content alloy.

    Topics: Aluminum Oxide; Boron Compounds; Carbon Compounds, Inorganic; Copper; Dental Bonding; Dental Cements; Dental Etching; Gold Alloys; Humans; Materials Testing; Metal Ceramic Alloys; Methacrylates; Methylmethacrylates; Palladium; Resin Cements; Shear Strength; Silicon Compounds; Silver; Stress, Mechanical; Surface Properties; Temperature; Thiouracil; Triazines

2011
Effects of metal primers on bonding of adhesive resin cement to noble alloys for porcelain fusing.
    Dental materials journal, 2010, Volume: 29, Issue:2

    This study evaluated the effects of metal primers on the bonding of adhesive resin to four pure metals (Au, Pd, Ag, Cu) and two noble alloys for porcelain fusing (high-gold and high-palladium content alloys). Bonding surface was polished with 600-grit silicon carbide paper and primed with one of the three metal primers (V-Primer, Metaltite, and M.L. Primer). Bonded specimens were fabricated by applying adhesive resin (Super-Bond C&B) on the primed surface. Shear bond strength (SBS) was determined both before and after thermocycling (4-60 degrees C for 2,000 cycles). The highest SBS values to each pure metal after thermocycling were 33.5 MPa for Au by M.L. Primer, 35.0 MPa for Ag by V-Primer, and 34.4 MPa for Cu by Metaltite. SBS to high-gold content alloy after thermocycling was 33.3 MPa by M.L. Primer. None of the primers was effective for pure Pd and high-palladium content alloy after thermocycling.

    Topics: Boron Compounds; Carbon Compounds, Inorganic; Copper; Dental Bonding; Dental Polishing; Gold; Gold Alloys; Humans; Materials Testing; Metal Ceramic Alloys; Methacrylates; Methylmethacrylates; Palladium; Resin Cements; Shear Strength; Silicon Compounds; Silver; Stress, Mechanical; Surface Properties; Temperature; Thiouracil; Time Factors; Triazines

2010