Coltene Ag

Dierk Lubbers

Ralf Kollefrath

Stephan Lampl

The present invention is related to clear crosslinkable polymeric masses for the registration of fingerprints, allowing to obtain positive reproductions of fingerprints by taking a photograph through a clear cured layer obtained from said polymeric masses.

Clear silicone material for the registration of fingerprints

The invention relates to a process of retraction of sulcus, comprising the steps of: applying a silicone material onto and/or at the vicinity of the boundary of a tooth and adjacent sulcus, which silicone material expands during or after its curing reaction; applying a cap onto said tooth, thereby forming a chamber over said silicone material, wherein said chamber comprises as its walls the tooth, the cap and an outer section of said sulcus; whereby said chamber allows for the silicone material to expand into the crevice between sulcus and tooth. Said cap is at least partially filled with a plastically deformable material when applied onto said tooth in step; and/or said cap is deformable, especially under biting pressure.

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Altstatten, Switzerland

Dierk Lubbers