Fig. 2

Comparison of the preoperative, the planned and the postoperatively achieved maxillary position: a Preoperative CBCT scan with the maxilla in the preoperative position. b Preoperative CBCT scan with the maxilla in the planned position. c Preoperative CBCT scan with the maxilla in the postoperatively achieved position. d The superimposition of the planned (yellow) and the achieved (green) maxillary position demonstrates the commonly observed underimpaction of the maxilla in vertical direction and a mild deviation of the midline in transversal direction