I am going to share a story with you, the reason will eventually become obvious. Hopefully it won't be too long....lol!
Since I have started carving recently, and employing some rotary carving as well, I can now put to use my dental bits! I probably have over 50 assorted dental bits. These I was given by a friend, who owns a dental lab. In the past he asked if I would be interested working for him on the weekends for extra money and he would pay me by the case, or crown. He thought I would be good at it because I am an artist. Why? Because once upon a time, you had to build and carve crowns out of wax!
Nowadays they have 3d scans and printed teeth!
This was the old school process...
The dentist would prep the tooth that needed a crown and take impressions of the upper and lower teeth. We would then receive the impressions from the dentist. I would take the impressions and pour the model work, upper and lowers. The bite would be established between the upper and lower teeth and hot glued together in a few spots.
Then they were glued to an articulator (metal hinged framework to simulate the biting motion). Then the hot glue was removed). Now you had a working model of the teeth and the patients mouth. You could usually tell by the size of the teeth and wear facets, the age of the patient!
Then we painted on two thin coats of clear on the tooth that was prepped for a crown. This was to ensure the thickness of adhesive to mount the crown was accounted for, and thus the margin of the crown would seat properly on the tooth when adhesive was applied by the dentist when installing it. An important step! Then the model of the prepped tooth was used to make a crown that was sculpted and carved with wax. If it was a porcelain crown, then a thin frame with a shelf above the margin was built to lay porcelain on, which has to be mixed, color matched, brushed on and backed in an oven, layer by layer. An art in and of itself! If it was a gold crown, the full tooth had to be built and carved in wax. My favorite...lol.
You heated a metal tool over a burner and dipped it in the wax to get some hot wax on the tip of the tool and spread that on the model, layer by layer. You had to work fast or the wax would harden on you. You could however reheat it with the tool to smooth out the geometry of the tooth. All carving was done with metal carving tools. You could actually wave the wax tooth over the burner quickly to smooth out geometry as well. There were many techniques involved in working with wax. I used large models of teeth, along with the actual teeth of the patient, as a reference to basically sculpt a new tooth. I learned the proper tooth anatomy of molars, bicuspids, and incisors in time by trail and error, and a lot of experience!
Once the tooth was fully built up, the bite had to be checked! We used a strip of printer ribbon, and placed it between the teeth and the crown and articulated the bite and pressed firmly. There must be three points of contact in the proper areas of the tooth on a molar for example. The points of contact would appear as dots from the ribbon. Those areas of contact often had to be adjusted by further carving the anatomy of the tooth, and sometimes even building up the tooth more, until the final proper geometry was established. If the bite isn't correct, it will make you miserable and the tooth will have to be remade!
The waxed tooth had a sprue added and then usually two or three teeth could be cast at a time. The casting canister, had a lid with an opening, we built a funnel out of wax at the opening and attached the sprues and teeth to it. Then the lid with the wax teeth was then carefully placed onto the canister (open metal tube) which was lined with a high temp material we added prior to pouring the investment casting material.
Using the open end, opposite the lid, the investment material was mixed and poured in around the teeth on a vibrator to remove any air bubbles, and left to cure. This was then placed in an oven and the wax was turned into powder and left a negative of the teeth. Now...(I know it's quite a process...lol) the canister was placed in a crucible that was spring loaded. The crucible was funnel shaped and the end aligned with the canister that was held in place tightly in the crucible. The metal, titanium or gold, was melted with a torch, and then when at the proper temperature, the crucible was released with a foot pedal. The spring turned it very fast and hard, slinging the metal into the cannister. That's investment casting! Then it was dipped in water to cool and later the casting material was carefully removed from around the teeth. The sprue was cut off and the crown polished! Crown was put on the model work and the bite checked one last time before sending back to the dentist. Whew! Yeah sorry for the long read, and I left out a lot of info!
So what does that have to do with my ship?
Well it was valuable experience! I was working under magnifying glasses, sculpting and carving wax teeth with tools, and using dental bits doing rotary carving as well. Not to mention I got a generous supply of bits given to me!
![Wink ;) ;)](https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f609.png)
This has given me somewhat of a head start in carving miniature stuff out of wood! I already learned a lot of valuable hand skills working in the dental lab for over two years making crowns the old school way! I am sure
@dockattner Paul can appreciate this story more than most!
![Wink ;) ;)](https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f609.png)
So in conclusion... many many years later I am using those bits that I was given... and happy to be doing it!