Results 311 to 320 of about 1,100,486 (356)
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Orthodontic bracket bonding: Enamel bond strength vs time
American Journal of Orthodontics and Dentofacial Orthopedics, 2006Tests of bond strength between orthodontic brackets and enamel are generally conducted after at least 24 hours storage in water. However, debonding might occur soon after bracket placement during orthodontic treatment. We investigated the rate of bond strength development for orthodontic adhesives in bracket bonding.Four orthodontic adhesive systems ...
Akira, Yamamoto +5 more
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Bond strengths of dentine bonding agents to dentine
British Dental Journal, 1992This study assessed comparatively the tensile bond strengths to dentine of four resin dentine bonding agents. Flat surfaces were produced in the occlusal dentine of human third molars, finished with 600-grit paper and prepared for bonding to Silux Plus composite with Gluma, Prisma Universal Bond 2, Scotchbond 2 and Tenure.
M, Jamil, Y E, Aboush, R J, Elderton
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Bond strength and durability of porcelain bonding systems
The Journal of Prosthetic Dentistry, 1996Because the most effective bonding system for ceramic restorations has not been documented, this study examined bond strength and durability of bonding systems joined to a feldspathic porcelain. Disks of porcelain specimens were fired on refractory investment materials and were air-abraded with alumina.
H, Kato +3 more
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Orthodontic bonding to porcelain—Bond strength and refinishing
American Journal of Orthodontics and Dentofacial Orthopedics, 1988Glazed porcelain surfaces are not amenable to resin penetration for orthodontic bonding. The aims of this study were to evaluate (1) the bond strengths of two orthodontic composite materials to treated porcelain surfaces, (2) the effect of thermocycling, and (3) the porcelain surfaces after refinishing.
G A, Smith +3 more
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Shear bond strength of four orthodontic bonding systems
American Journal of Orthodontics and Dentofacial Orthopedics, 1990Recently new orthodontic bonding systems have been developed for attachment of brackets to the etched facial surfaces of teeth. Two of these new systems use bonding agents that contain solvents. It is claimed that this improves the polymerization of the unfilled resin primer and may increase bond strength.
M N, Coreil +3 more
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Bond Strengths: The Importance of Hyperconjugation
Organic Letters, 2006[Structure: see text] Gronert (J. Org. Chem. 2006, 71, 1209) has challenged the importance of hyperconjugation in determining C-H bond dissociation enthalpies (BDEs) in alkanes. Electron paramaganetic resonance spectra of H3CCH2*, (H3C)2CH*, and (H3C)3C* show significant positive spin on their beta-H3C groups' hydrogens. A 55%/45% partitioning of these
Ingold, K. U., DiLabio, Gino A.
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TDS: Bond Nature and Bond Strength
2014TDS features and work function change coincidently demonstrate four-stage bond forming kinetics and associated valence charge relaxation. The four stages include the following: (1) O1− formation, (2) O1− transition O2− with sp-orbit hybridization, (3) tetrahedron relaxation, and (4) dipole annihilation upon oxygen overdosing.
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Visible Light-Driven Radical-Mediated C–C Bond Cleavage/Functionalization in Organic Synthesis
Chemical Reviews, 2021Jia-Rong Chen, Wen-Jing Xiao
exaly