Another removable double brace based on the Activator was developed by Hugo Stockfisch and featured upper-jaw and lower-jaw parts that were joined together by two elastic tubes. The first publication of a dedicated textbook followed in 1966. This made Stockfisch one of the most prominent authors of the so-called “functioning orthodontics” movement, a forgotten doctrine belonging to the last century. Stockfisch believed that by the patient biting on the plastic tubes in such a way, he would be able to use the strength of the muscles to correct distoclusion (overbite, Angle-Class 2). He also developed a set of pre-fabricated parts to facilitate the manufacture of the Kinetor in the laboratory. However, certain advantages that have been claimed over the monoblocks (Activator – Bionator) have never been proven, whilst the appliance itself, in addition to being more time-consuming to manufacture in spite of the the pre-fabricated parts, also goes wrong more easily and is problematic from a hygiene point of view. We are talking here about an outdated appliance the use of which can no longer be justified.

The Kinetor in position in the mouth; near the two plates it is easy to see all the wire components and the two plastic tubes which join the plates together. There is really no more space to fit anything else into the mouth – are children really supposed to walk around like this? This image illustrates far better than any words why this brace is no longer in current use.