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Maryam Mojahedian,Farahnaz Fahimipour,Kim Lambertsen Larsen,Mahdi Kalantar,Farshid Bastami,Negin Omatali 한양대학교 세라믹연구소 2016 Journal of Ceramic Processing Research Vol.17 No.11
One of the easy ways to prepare nanocrystalline hydroxyapatite (nano-HAp) is the sol-gel method that due to its uniqueadvantages compared to conventional methods, has raised research interest among scientists. The purpose of this study wasto investigate the properties of nano-HAp powders which were synthesized by ethanol-based sol-gel method withstoichiometric ratio of Ca/P = 1.67 and comparing it with closer ratios of 1.5 and 1.6. To do so, we used the aqueous solutionof phosphorus pentoxide (p205, MERCK) and four-watered calcium nitrate (Ca (NO3)2.4H2O, MERCK) in ethanol. Theresulted nano-powders and sintered pellets made of it were analysed and compared with X-ray diffraction analysis (XRD). Also, the sintered pellets’ bioactivity in simulated body fluid (SBF) solution was examined by SEM. In powders which werecalcined at the temperature of 600 oC, the most amorphous phase (49%) in comparison to Ca/P = 1.5 was observed. Aftersintering, the main phase of 1.67 ratio was hydroxyapatite (HAp) and the main phase of 1.5 ration was β-TCP, although in1.6 ration a composite of HAp and β-TCP was observed. According to the results, sol-gel method for producing nanocrystallineHAp was an appropriate method; in addition, compared with the different ratios of Ca/P, the stoichiometric nanocrystallinemay have better bioactivity.
Advancements in craniofacial prosthesis fabrication: A narrative review of holistic treatment
Jazayeri, Hossein E.,Kang, Steve,Masri, Radi M.,Kuhn, Lauren,Fahimipour, Farahnaz,Vanevenhoven, Rabecca,Thompson, Geoffrey,Gheisarifar, Maryam,Tahriri, Mohammadreza,Tayebi, Lobat The Korean Academy of Prosthodonitics 2018 The Journal of Advanced Prosthodontics Vol.10 No.6
The treatment of craniofacial anomalies has been challenging as a result of technological shortcomings that could not provide a consistent protocol to perfectly restore patient-specific anatomy. In the past, wax-up and impression-based maneuvers were implemented to achieve this clinical end. However, with the advent of computer-aided design and computer-aided manufacturing (CAD/CAM) technology, a rapid and cost-effective workflow in prosthetic rehabilitation has taken the place of the outdated procedures. Because the use of implants is so profound in different facets of restorative dentistry, their placement for craniofacial prosthesis retention has also been widely popular and advantageous in a variety of clinical settings. This review aims to effectively describe the well-rounded and interdisciplinary practice of craniofacial prosthesis fabrication and retention by outlining fabrication, osseointegrated implant placement for prosthesis retention, a myriad of clinical examples in the craniofacial complex, and a glimpse of the future of bioengineering principles to restore bioactivity and physiology to the previously defected tissue.