as shown in fig2 a prepared tooth 212 is digitally captured by the at least one camera 208 for comparison with a pre prepared crown die the crown die is used for forming a crown to be fitted over the prepared tooth 212 as shown in fig2 through 30 a crown die 214 is digitally captured by at least one camera 216 and transmitted by cpu interface cable 218 to a central processing unit cpu 220 the die 214 may be located at a remote location and an image electronically transmitted to the cpu 220 the captured image of the prepared tooth is similarly transmitted to cpu 220 by cpu interface cable 206 software in the cpu 220 produces signals transmitted over image transmission cable 221 to allow a side by side comparison on a monitor 222 of an image 224 of the prepared tooth 212 and an image 226 of the crown die 214 incorporated into the displayed images is an identifying arrow or indicia 228 230 respectively to identify the same position or view of both the images 224 226 so as to identify disparities between the images it is also possible by manipulation of the software of the cpu to overlay the images 224 226 relative to each other as shown in fig2 while simultaneously using the identifying arrow or indicia 228 230 respectively for a closer comparison of the images it is possible to match the.