Abstract: Dental materials containing monomers and/or prepolymers can be subjected to a polymer-forming reaction. The dental materials comprise at least one initiating system and optionally comprise fillers, colorants, flow modifiers, stabilizers, ion-releasing substances as well as compounds which increase X-ray capacity or other modifiers. The dental materials are characterized in that the initiating system is proportioned such that the dental materials are sufficiently capable of flowing for at least 10 seconds after exposure to oxygen, whereupon they subsequently harden into a solid material.

Abstract: When dispensing a flowable substance from a container by way of a motor driven dispensing device, for ensuring that the container is properly inserted into the device, that the substance is still usable and/or that the dispensing speed is selected in accordance with the viscosity or other properties of the substance, the container is provided with a marking which may be stored in a transponder provided at a front container cap. When the container is properly inserted into the dispensing device, the transponder cooperates with a sensor disposed in an end wall of the device for enabling and/or controlling the dispensing mechanism on the basis of the characteristic data detected.

Abstract: The invention relates to polysiloxanes from cross-linkable monomers based on cyclosiloxanes and their use in polymerizable compositions. The invention relates in particular to polysiloxanes from sol-gel-condensable cyclosiloxane(meth)acrylates as well as resinous compositions, obtainable by hydrolytic condensation of one or more hydrolyzable and condensable cyclosiloxane(meth)acrylates.

Abstract: The invention relates to two-component preparations comprising components (I) and (II), wherein at least one component comprises epoxy compounds and the preparations cure by cationic polymerization, initiated by Lewis and/or Brönsted acids, after mixing of the two components, the preparations comprising the Lewis and/or Brönsted acids in the form of precursor compounds which are suitable for the formation of Lewis and/or Brönsted acids.

Abstract: The invention relates to novel cyclic siloxane compounds of the following general formula (I): in which: n=0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 preferably 1, 2, 3, 4, 5; A=H or C1-C15 alk(en)yl, C3-C15 cycloalk(en)yl, C6-C12 aryl, C8-C18 alkaryl, where, in the said radicals, in each case one or more C atoms can be replaced by O, C═O, O(C═O), SiR2 and/or NR, R being an aliphatic radical with 1 to 7 C atoms, in which one or more C atoms can be replaced by O, C═O, and/or O(C═O); B=E or a linear, branched or polycyclic aliphatic- or aromatic-groups-containing hydrocarbon radical which links 2 to 10 of the cyclosiloxane radicals defined above, less B, to one another and contains 2 to 50 C atoms and additionally 0 to 30 other atoms from the group O, N, S, P, Si, Cl, F, Br, I and from which correspondingly 1 to 9, preferably 1 to 4 of the above defined cyclosiloxane radicals, less B, are pending; E=A or a polymerizable group G—Q—L, where o

Abstract: A mixer capsule, especially for the production of dental materials, comprising a cartridge (10) that is closed on one end by a piston (12). The piston has a hemispherical recess (12) that forms a chamber and is closed off from the main chamber (18) of the cartridge (10) by means of a separating device (16). A body (20) that is provided in the initial state in the main chamber (18) is used to facilitate the mixing process and to penetrate the separating device (16) at the beginning of the process, whereby the main chamber (18) and the subsidiary chamber (17) form a single mixing area. At the end of the output process, the body (20) enters the hemispherical subsidiary chamber (17) and acts as a displacer.

Abstract: A metal free dental filling system is provided which prevents the transmission of destructive forces from the shrinking filling material to the sealed dental hard tissue. The system prevents the transmission of destructive forces by making the bond of the cured adhesive sealant to the dental hard tissue, i.e., the enamel, dentin, and root cement, substantially stronger than the bond of the cured adhesive sealant to the filling material. An intermediate layer material may be arranged between the dental filling material and the cured adhesive sealant. If an intermediate layer is used, the bond between the dental hard tissue and the cured adhesive sealant is much stronger than the bond between the cured adhesive sealant and the intermediate layer in order to ensure that substantially no destructive forces are transmitted from the shrinking filing material to the cured adhesive material on the dental hard tissue. The intermediate layer may be removed prior to application of the filling material.