Shear bond strength of amalgam and gallium alloys to dentine.
The purpose of this in vitro investigation was to determine the shear bond strength of admixed (Dispersalloy), irregular (Oralloy) and spherical (Lojic) amalgams, as well as an admixed gallium alloy (Galloy) to superficial, buccal, human dentine surfaces, using the Scotchbond Multi-Purpose Plus system. The bonds were stressed to failure in an Instron testing machine after 48 hours, and the following values (MPa) were obtained: Admixed = 7.74 +/- 0.7; Irregular = 9.47 +/- 1.4; Spherical = 9.82 +/- 2.4; Galloy = 11.03 +/- 2.5. Data were statistically analysed and fracture sites examined in a scanning electron microscope. Galloy demonstrated a statistical significant higher shear bond strength than to the other types of amalgams (p < 0.01).
van der Vyver
P J
PJ
Division of Dental Materials, School of Dentistry, University of the Witwatersrand, Johannesburg.
Setzer
S
S
D003722:Dental Alloys / Q000737:chemistry*; D003723:Dental Amalgam / Q000737:chemistry*; D001840:Dental Bonding; D003804:Dentin / Q000187:drug effects*; D005708:Gallium / Q000737:chemistry*; D006801:Humans; D066298:In Vitro Techniques; D008422:Materials Testing / Q000379:methods; D008855:Microscopy, Electron, Scanning; D013314:Stress, Mechanical; D013499:Surface Properties
D003722:Dental Alloys; C100747:Galloy; C033470:Dispersalloy; D003723:Dental Amalgam; D005708:Gallium