Throughout my personal career in dental technology, I have seen many different model systems.

Modellsysteme

It’s difficult to pick one as the best, in my opinion, each has its own advantages, but definitely also its disadvantages.

With careful processing and high-quality raw materials, you don’t have to worry about the dimensional accuracy of plaster any more. The greater challenge is coordinating the individual requirements and fulfilling the dentist’s demands.

Economic factors are, of course, always an attractive incentive but what benefit do I get from saving time and production costs when I have to spend more time with corrections?

Looking at this from a purely functional point of view, the questions for or against are much more determined by the patient’s situation requirements than the model system itself.

Regardless of whether we place more importance on the time/cost advantages, or rather focus on function and precision, it isn’t possible to separate and say either/or.

I’ll stick to my motto:
with all the creativity and talent we have as dental technicians, there is one thing we should never forget; the success of a dental restoration is determined by the consistent avoidance of potential mistakes and errors.

The model systems using acrylic base plates are already very advanced. The prefabricated base plates save time and the cost-effective pins underline the economic factor. With the introduction of the automatic drilling procedure, mistakes caused by human error are prevented and the pins are subjected to a uniform level of friction. However, if you look at the finished models, it is noticeable that the dental arches are often very high or uneven. When asked, the reason for this is often because of the risk of possible collision of pin and impression.

Modell1              Modell2

Of course, a skilled dental technician who knows the system and who has a trained eye will be able to produce evenly sized dental arches. However, past experience has shown that the people working in the model department are often technicians taking their first steps in the world of dental technology. And not everyone is immediately familiar with a model system.

This is when Renfert had a fabulously simple idea for the model system, AUTO spin. With the help of an additional planning aid (AUTO spin Level Controller), you can avoid possible collisions or check and adjust the level of the base plate and occlusal plane. These error sources can therefore be excluded from the beginning.

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I would also describe setting the drill depth as a difficult topic using the previous methods.

With the new Renfert AUTO spin pin drill, the integrated tool holder, the comfortable single-handed drill fixation and the fine height adjustment mean setting the drill depth is now a controlled and precise procedure, which doesn’t have to be carried out repeatedly.

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The AUTO spin model system accessories are reduced to the essentials, and yet each individual component has been implemented with the highest degree of precision. The fit of the base plate and secondary plate, the uniformity of the pins and the quality of the drills are impressive. I also think it is very good that an open system has been created here. All system components are compatible with other known model systems such as Giroform® or Zeiser®. In comparison with other competitor plate holders, Renfert’s AUTO spin universal plate holder has a double screw fixation, which enables excellent retention of all competition base plates.

As mentioned earlier, the requirements that each dental technician places on a model system may be very different. But, something we all agree on is that it has to save time, be trouble-free and it’s the end result that counts.

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Cim Özyurt is dental technician and Product Manager at Renfert GmbH. Part of his field of work is the product range brushes & mixing trays where he is ...

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