chieve the ideal corrective effect.5. bring the patient invisible experience?6. The surface is super-smooth and delicate, foreign body sensation is small.?Product usage: for orthodontic treatment of tooth?Production type:You can choose orthodontic sapphire clear brackets according to following type:Roth, standard type/mini type, 0.018/0.022, 3 with hook/ 345with hook/without hookMBT, standard type/mini type, 0.018/0.022, 3 with hook/ 345with hook/without hookEdgewise, standard type/mini type,