Computer-aided design/computer-aided manufacturing (CAD/CAM) devices seem to be taking over the dental space. Of these, 3-d intra-oral scanners are revolutionizing the way we take intra-oral impressions. In dentistry, customisation is necessary because the data of all the human beings are not the same. The intraoral scanners captures data of unique dental anatomy of patient and convert it into 3D digital CAD file.
Intra-oral scanners (IOS) are devices used for capturing direct optical impression in dentistry. They project a light source onto the object to be scanned i.e. dental arches- prepared teeth and implant scan bodies( cylinders screwed on the implants , used for transferring the 3D implant position). The images of oral tissues as well as the implant scan bodies captured by imaging sensors are processed by the scanning software which creates a 3D surface model .The 3D surface models of dental tissues are the result of optical impression and are 'virtual' alternative to traditional plasters models.
Although there are certain limitations of intra-oral scanners but with newer generations they are being upgraded with time. Optical impressions have several advantages over conventional impressions ;among them the most important is reduction of patient stress and discomfort. They are time efficient and can simplify clinical procedures.
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