Fraunhofer-Gesellschaft

Publica

Hier finden Sie wissenschaftliche Publikationen aus den Fraunhofer-Instituten.

Replication of waveguide elements using ORMOCER material

 
: Danneberg, M.; Bräuer, A.; Karthe, W.; Waldhäusel, K.; Wolter, H.

4th International Conference on Micro Electro, Opto, Mechanical Systems and Components '94. Proceedings
Berlin: VDE Verlag, 1994
International Conference on Micro Electro, Opto, Mechanical Systems and Components <4, 1994, Berlin>
English
Conference Paper
Fraunhofer ISC ()
optical media; ORMOCERs; replication; waveguide element

Abstract
Due to the unesthetic appearance, the toxicologigal problems of mercury and the galvanic corrision there is a need for a posterior dental filling material which is able to substitute the amalgam fillings. To provide such materials mulifunktional urethane- and thioether oligo (meth)acrylate alkoxysilanes as sol-gel precursors have been used for preparation of a special family of inorganic/organic copolymer composites (ORMOCER s) on a molecular scale.The alkoysilyl groups of the silane allow the formation of inorganic Si-O-Si-network by hydrolysis and polycondensation reactions. In order to achieve X-ray-opacity higher than that of dental enamel silicon can partly be replaced by heavier elements,e.g. zirconium. After incorporation of special dental glass fillers the resulting paste-like composite can be applied by the dentist. Beside the UV- and thermally induced polymersation a light- and redox-induced curing is also possible to build up the additional organic polymer structure. Toxicol ogical problems are not exspected because of the usage of silane-connected acrylates and methacrylates and therefore the linkage to the inorganic polymer structure.

: http://publica.fraunhofer.de/documents/PX-31752.html