Ormocer

Ormocer, short for organically modified ceramic, is a class of organic–inorganic hybrid materials that combines an inorganic oxide network with organic polymerizable groups connected through siloxane linkages. This dual nature aims to merge ceramic-like stability with polymeric versatility, enabling materials that can be shaped and cured like resins while possessing a ceramic component.

In dentistry, ormocers are produced through sol–gel processes involving silicon alkoxides that form a siloxane or silicate network. Organically modified monomers bearing methacrylate or other polymerizable groups are covalently integrated into this network. After formulation, the material is typically cured by light to yield a crosslinked hybrid resin that retains the inorganic–organic interface established during synthesis.

Ormocer-based materials are described as having reduced polymerization shrinkage, lower water sorption and solubility, and improved wear resistance and polishability relative to conventional methacrylate resins. They are promoted for esthetic dental restoratives and sealants, with the aim of combining the handling and aesthetics of composites with the durability of ceramics.

Commercial introduction of ormocer-based dental products occurred in the early 2000s, with brands such as Admira and its successors marketed by VOCO. Although dentistry remains the primary domain of ormocer applications, research has explored broader uses in coatings and biomedical fields, reflecting the broad interest in organic–inorganic hybrids.