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Figure 1. Radiographic analysis of bone loss for one- and two-part implants. A calibration factor was determined based on the known distance between the uppermost and the lowermost thread crests (distance between 2 adjacent crests: 1.25 mm) and the length measured on the radiograph. The reference points were the apex and the coronal bone-to-implant contact projected to the midline of the implant. The distance between these points was subtracted from the length of the rough surface.
