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  4. A comparative study of ORMOCER and PARALOID B72 for conservation of outdoor glazed ceramics
 
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1995
Conference Paper
Title

A comparative study of ORMOCER and PARALOID B72 for conservation of outdoor glazed ceramics

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.
Author(s)
Pilz, M.
McCarthy, B.
Mainwork
Fourth Euro-Ceramics 1995. Proceedings of the Fourth European Ceramic Society Conference. Vol.14: The cultural ceramic heritage  
Conference
Euro-Ceramics (ECerS) 1995  
Language
English
Fraunhofer-Institut für Silicatforschung ISC  
Keyword(s)
  • ceramic

  • glazed

  • ORMOCERs

  • paraloid B72

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