Chitosan/nanohydroxyapatite composite membranes via dynamic filtration for guided bone regeneration

2008 ◽  
Vol 88A (3) ◽  
pp. 569-580 ◽  
Author(s):  
Shu‐Hua Teng ◽  
Eun‐Jung Lee ◽  
Byung‐Ho Yoon ◽  
Du‐Sik Shin ◽  
Hyoun‐Ee Kim ◽  
...  
Nanomaterials ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 985 ◽  
Author(s):  
Gheorghe Nechifor ◽  
Eugenia Eftimie Totu ◽  
Aurelia Cristina Nechifor ◽  
Ibrahim Isildak ◽  
Ovidiu Oprea ◽  
...  

The polymer-inorganic nanoparticles composite membranes are the latest solutions for multiple physicochemical resistance and selectivity requirements of membrane processes. This paper presents the production of polysulfone-silica microfiber grafted with titanium dioxide nanoparticles (PSf-SiO2-TiO2) composite membranes. Silica microfiber of length 150–200 μm and diameter 12–15 μm were grafted with titanium dioxide nanoparticles, which aggregated as microspheres of 1–3 μm, applying the sol-gel method. The SiO2 microfibers grafted with nano-TiO2 were used to prepare 12% polysulfone-based nanocomposite membranes in N-methyl pyrrolidone through the inversion phase method by evaporation. The obtained nanocomposite membranes, PSf-SiO2-TiO2, have flux characteristics, retention, mechanical characteristics, and chemical oxidation resistance superior to both the polysulfone integral polymer membranes and the PSf-SiO2 composite membranes. The antimicrobial tests highlighted the inhibitory effect of the PSf-SiO2-TiO2 composite membranes on five Gram (-) microorganisms and did not allow the proliferation of Candida albicans strain, proving that they are suitable for usage in the oral environment. The designed membrane met the required characteristics for application as a functional barrier in guided bone regeneration.


2012 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
pp. 1-18
Author(s):  
Hung-Yin Tai ◽  
Shiu-Huey Chou ◽  
Liao-Ping Cheng ◽  
Hung-Te Yu ◽  
Trong-Ming Don

Author(s):  
Saurabh Mohan Kamat ◽  
Rakshit Khandeparker ◽  
Francis Akkara ◽  
Vikas Dhupar ◽  
Ashwin Mysore

Membrane fixation in guided bone regeneration (GBR) has been traditionally achieved using resorbable pins, titanium tacks or miniscrews. However, these techniques are marredwith a number of clinical challenges. This article presents the “SauFRa” technique, a novel technique for stabilization of resorbable membranes in both, single as well as multiple implant sites while avoiding the shortcomings of other suturing techniques described in literature. Furthermore, the technique also eliminates the possibility of complications observed when using resorbable pins, titanium tacks or miniscrews, such as damage to adjacent roots during insertion. The authors’ employed this technique in 89 patients (51 male and 35 female) and found no complications like tissue dehiscence, infection or graft migration.


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