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The green regions are recommended for the placement of palatal mini-implants where the thickness of palatal hard tissue was greater than 4.5 mm. The yellow regions are the optimal sites for palatal mini-implants, where the thickness of palatal hard tissue was greater than 4.5 mm and the thickness of soft tissue was less than 2 mm. For adolescents, midpalatal areas should be avoided for the insertion of mini-implants.
