Fig. 1

Measuring technique of IMCD on PAN (a) and CBCT (b). Panoramic-like reconstructions visualize the MC in anterior-posterior direction (a). CBCT depicts the MC in buccolingual direction (b). After marking 1 point (voxel) each on the apex of the implant and the upper boarder of the MC, the computer calculated the shortest distance between these points to the nearest 0.1 mm. Optimal visualization was ensured by adjusting contrast and brightness of images with the image-processing software tool