A 3D X-ray (DVT) is now listed by many implantologists as a basic requirement for implant placement. Various reasons are cited for this, including a more accurate treatment and cost plan (HKP) or a prerequisite for minimally invasive implantation, as this is the only way to accurately depict the hard and soft tissue structures. But reality shows that this is not the case.The 3D image is calculated by computer from a large number of 2D projections created by a circulating projector and receptor. Each manufacturer uses its own algorithms for this, which lead to different results, as the devices allow parameters such as mAs, KV, voxel size, number of frames to be changed, the exact effects of which are unclear to many operators. Specific protocols for defined indications, which currently do not exist, would be very helpful. Depending on the setting of these parameters, the DVT can turn out very differently and is therefore unsuitable as an exact diagnostic.