Clinical case describing the placement of two implants to replace the right central and lateral incisors. The procedure began with an osteotomy using a 1.8 mm diameter drill, followed by a first periapical radiograph taken with 1.65 mm SXR probes. After image calibration, an initial measurement was performed up to the floor of the nasal fossa, clearly visible on the radiograph, and two 4 × 15 mm implant silhouettes were superimposed.
Drilling was then continued to a depth of 15 mm, and a second periapical radiograph was obtained using 2.7 mm SXR probes. Following calibration of this radiograph, two 4 × 18 mm implant silhouettes were superimposed to verify the safety of the achieved depth.
Finally, two 4.3 × 18 mm implants were placed, and an immediate postoperative radiograph was taken using SXR, confirming implant parallelism, appropriate distance to adjacent teeth, and correct final positioning. The use of sequential radiographs allowed full utilization of the available bone, enabling the safe placement of long implants. Notably, uncalibrated measurements demonstrated high accuracy, with values of 17.8 mm and 17.9 mm.