Cover story: Three-dimensional HD intraoral scanner –, simplifying dentistry

[摘要] Conventional radiographic techniques have been used in dental radiography since the discovery of the X-rays. Digital imaging has been replacing traditional films in private practice, academic institutions in the last two decades. Digital images are in a numeric format and differ from conventional radiographs in terms of pixels, and the different shades of gray given to these pixels.[1] The digital image is produced by analog-to-digital conversion. First, the small ranges of voltage values in the signal are grouped together as a single value. Second, every sampled signal is assigned a value and stored in the computer. Last, the computer organizes the pixels in their proper locations and displays a shade of gray corresponding the number assigned, and the image becomes visible on the computer screen.