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Functional Frankel device
Frankel function regulator is a device that aims to identify when the attitude of muscle orofacial is not correct. This device can be built in four types of devices that have the same principle, with different purposes.
FR-1 > I CLASS and II CLASS Division I
FR-2 > I CLASS and II CLASS Division I Deep bite
FR-3 > CLASS III
FR-4 > Correction of Open Bite