Digital dentistry refers to the use of dental technologies or devices that incorporates digital or computer-controlled components to carry out dental procedures rather than using mechanical or electrical tools. The use of digital dentistry can make carrying out dental procedures more efficient than using mechanical tools, both for restorative as diagnostic purposes. Used as a way to facilitate dental treatments and propose new ways to meet rising patient demands.X-rays have been extremely valuable for many years in assessments of oral health. However, at times the image produced can show limited information because it is only a 2D image. Intra-oral cameras (IOCs) allow an operator to see a clear image of the inside of the mouth. Similar to the size of a dental mirror IOCs have a tiny camera that is able to detect more on the 3D surface of a tooth than a 2D x-ray image is able to show. Examples include specific locations and sizes of cavities, cracked teeth, excessive erosion, abrasion and many more. Conventional dental impressions are made by placing an impression material loaded on an impression tray over the dental arches. As it sets a negative imprint of the soft and hard tissues in the mouth. Digital intra-oral impressions made using intra-oral cameras are able to recreate the positive impression of a patient's dentition and other structures into a digital format on a computer almost instantly.Traditionally dentists will use a physical shade guide in the dental surgery as they compare the patient's teeth to the shades in the guide, all done while the patient is in the chair. Newer computer matching techniques allow for a more superior than matching methods currently used.[4] There is always differences in perception when it comes to the human eye and observation. This was proved in a study which found that there was a high statistical correlation between a spectrophotometer and the digital camera used.[4] Now used in some dental surgeries it can improve dental-laboratory communication.Caries disease process results in structural changes to the dental hard tissue. The diffusion of ions out of the tooth, known as the demineralisation process, will result in loss of mineral content. The resulting region will be filled mainly by bacteria and water. This region will have greater porosity than the surrounding tissue, which results in a distinct change in the optical properties of the affected dental tissue, providing evidence of caries-induced change. Optically based methods detect caries on changes in the specific optical properties. Quantitative light-induced fluorescence – Changes in enamel fluorescence can be detected and measured when the tooth is illuminated by violet-blue light from a camera hand piece. The image is saved and processed. The end product is an image which gives a measure of the extent and severity of the lesion

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