Faculty of Dentistry

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Internationally known for its academic achievements in both clinical and research, the Faculty of Dentistry at the University of Toronto is the champion of dental school in Canada. Since founded in 1875 by the Royal College of Dental Surgeons of Ontario, the Faculty has continuously educated top-notch specialists in Orthodontics, Paediatric, Dentistry, Periodontology, Endodontics, Prosthodontics, and many more disciplines. One of the major commitments of the faculty is to dental research as no such research is carried out by private industry or government bodies. On the same page, the faculty also takes on a multi-disciplinary approach as it participates in a number of inter-faculty programs.

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Browsing Faculty of Dentistry by Author "AlFawaz, Yasser F."

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    Dentin Bond Integrity of Hydroxyapatite Containing Resin Adhesive Enhanced with Graphene Oxide Nano-Particles—An SEM, EDX, Micro-Raman, and Microtensile Bond Strength Study
    (2020-12-14) AlFawaz, Yasser F.; Almutairi, Basil; Kattan, Hiba F; Zafar, Muhammad S.; Farooq, Imran; Naseem, Mustafa; Vohra, Fahim; Abduljabbar, Tariq
    The aim was to synthesize and characterize an adhesive incorporating HA and GO nanoparticles. Techniques including scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDX), micro-tensile bond strength (μTBS), and micro-Raman spectroscopy were employed to investigate bond durability, presence of nanoparticles inside adhesive, and dentin interaction. Control experimental adhesive (CEA) was synthesized with 5 wt% HA. GO particles were fabricated and added to CEA at 0.5 wt% (HA-GO-0.5%) and 2 wt% GO (HA-GO-2%). Teeth were prepared to produce bonded specimens using the three adhesive bonding agents for assessment of μTBS, with and without thermocycling (TC). The adhesives were applied twice on the dentin with a micro-brush followed by air thinning and photo-polymerization. The HA and GO nanoparticles demonstrated uniform dispersion inside adhesive. Resin tags with varying depths were observed on SEM micrographs. The EDX mapping revealed the presence of carbon (C), calcium (Ca), and phosphorus (P) in the two GO adhesives. For both TC and NTC samples, HA-GO-2% had higher μTBS and durability, followed by HA-GO-0.5%. The representative micro-Raman spectra demonstrated D and G bands for nano-GO particles containing adhesives. HA-GO-2% group demonstrated uniform diffusion in adhesive, higher μTBS, adequate durability, and comparable resin tag development to controls.