1. A process for making a model comprising:
(a) forming a modelling paste by mixing two or more separate reactive components wherein at least two of the reactive components each includes a nanoscale platelet filler and aluminum trihydrate that interacts with the nanoscale platelet filler dispersed in the reactive component and wherein the nanoscale platelet filler in at least one of the reactive components comprises alkyl ammonium ions on the surface of a basic bentonite clay structure;
(b) applying the modelling paste to a structure;
(c) curing the modelling paste in a continuous layer to form the model; and
(d) optionally machining the cured layer to a desired contour.
2. The process of claim 1 wherein the nanoscale platelet filler has a thickness of less than 1 micron.
3. The process of claim 1 wherein the nanoscale platelet filler has an aspect ratio higher than 10.
4. A process for making a seamless model free of bond lines comprising:
(i) providing a substructure having an exposed outer surface;
(ii) forming a modelling paste by mixing two or more separate reactive components wherein at least two of the reactive components each includes a nanoscale platelet filler and aluminum trihydrate that interacts with the nanoscale platelet filler dispersed in the reactive component and wherein the nanoscale platelet filler in at least one of the reactive components comprises alkyl ammonium ions on the surface of a basic bentonite clay structure;
(iii) applying the modeling paste to the outer surface of the substructure in the form of a continuous layer;
(iv) curing the continuous layer of applied modelling paste; and
(v) machining said cured layer of modelling paste to a desired contour.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A method for finishing class II composite fillings on a mesial surface of molar and premolar teeth comprising:
using a blade to scrape excess resin on the mesial surface a molar or premolar tooth,
wherein the blade comprises a blade protrusion on one side,
wherein the protrusion comprises a cutting edge,
wherein the cutting edge is curved to compliment the mesial curvature of a molar or premolar tooth on the distal portion of the blade protrusion relative to the handle.
2. The method of claim 1, wherein the blade is disposable.
3. The method of claim 1, wherein the handle is disposable.
4. The method of claim 1, wherein the blade sufficiently thin to fit between the tooth in need of finishing and the adjacent tooth.
5. The method of claim 1, wherein the handle is curved greater than 5 degrees at a location near the blade.
6. The method of claim 5, wherein the handle is curved greater than 5 degrees in a vertical direction relative to the flat surface of the blade.
7. The method of claim 5, wherein the handle is curved greater than 5 degrees in a horizontal direction relative to the flat surface of the blade.