Bio-Medical Materials and Engineering - Volume 19, issue 2-3

Authors: Nagano, Futami | Selimovic, Denis | Noda, Mamoru | Ikeda, Takatsumi | Tanaka, Toru | Miyamoto, Yusei | Koshiro, Ken-ichi | Sano, Hidehiko

Article Type: Review Article

Abstract: Since adhesive technology was introduced into dental field, metal-based restoration has been gradually replaced by metal-free restoration. Using the adhesive technology, minimum invasive technique has been possible in daily clinical practice as well as esthetic tooth-colored restorations have become very popular all over the world. One of the current issues of the dental adhesive is durability of bond between tooth structure and adhesive resin. Several approaches to overcome the issues have been carried out. Self-etching approach is believed to create durable bond because demineralization of superficial tooth surface is very shallow. Other approach is to utilize the inhibitor of …enzymes which are suggested to catalyze the decomposition of resin composites and are always secreted within the oral environment. In the present study, Colloidal Platinum Nanoparticles (CPN) was applied before the application of 4-META/MMA-TBB resin cement as the third possibility to prolong the durability of bond. This implies that the use of the CPN solution would create higher conversion at the interface compared with conventional bonding procedures. Show more

Keywords: Dental adhesive, minimal intervention, durability, colloidal platinum nanoparticles, nano-technology

DOI: 10.3233/BME-2009-0587

Citation: Bio-Medical Materials and Engineering, vol. 19, no. 2-3, pp. 249-257, 2009

Authors: Matsuda, Masami | Hunt, Geoffrey

Article Type: Review Article

Abstract: We initiate some comparisons between Japan, Europe and USA on how far there is governmental support for the ethical, legal, social and environmental dimensions of nanotechnology development. It is evident that in the USA and Europe nanotechnology is now firmly embedded in the consideration of ELSI. Yet Japan has not yet adequately recognized the importance of these dimensions. The history of bioethics in Japan is short. In Europe, as early as 2004, a nanotechnology report by the UK's Royal Society referred to the possibility of some nanotubes and fibres having asbestos-like toxicity. The negative history of asbestos in Europe and …USA is not yet fully identified as a Japanese problem. Japan is therefore in the process of seeking how best to address societal aspects of nanotechnology. Should the precautionary principle be applied to Japan's nanotechnology initiative as in Europe? Should 5–10% of the government's nanotechnology budget be allocated to ELSI research and measures? We propose that the government and industrial sector in Japan play a much more proactive part in the regional and international growth of research into the wider risk assessment, social, health and environmental context of nanotechnologies, not simply try to borrow lessons from the West at a later date. Show more

Keywords: Asbestos, bioethics, ELSI, nanotechnology, USA, Europe, Japan

DOI: 10.3233/BME-2009-0588

Citation: Bio-Medical Materials and Engineering, vol. 19, no. 2-3, pp. 259-267, 2009