Brackets were adapted, and on the wings, a flat and thin lamina 0.02 mm thick was glued in a parallel position to the base of the bracket. This device was used to record crown rotation Figure 4.
A los brackets se les adaptó y pegó sobre las aletas, una lámina delgada y plana 0.2 mm de grosor, paralela a la base del bracket, que se utilizó para tomar el registro de la rotación coronal Figura 4.