![]() ![]() After the overlapping of these models, powerful reverse-engineering software can be used to generate colorimetric maps displaying the differences between the surfaces of the IOS and the reference model at the micron level. Generally, the means of evaluating the trueness of an IOS is to overlap its scans with a reference scan obtained with a powerful industrial machine. Precision is the ability of a measurement to be consistently repeated.Īn intraoral scanner should have high trueness and that means it should be able to match reality as closely as possible: the virtual 3D model captured by the scanner should resemble the actual model as closely as possible, with minimal deviation from reality. Simply put, trueness is the ability of a measurement to match the actual value of the quantity being measured. Precision is defined as the ‘closeness of agreement between indications or measured quantity values obtained by replicate measurements on the same objects under specified conditions’. Trueness is defined as the ‘closeness of agreement between the expectation of a test result or a measurement result and a true value’. We need to know that accuracy is the sum of trueness and precision. Nothing is more important than accuracy, an intraoral scanner should first have the ability to create an accurate digital impression. The blog is to teach you how to evaluate the data quality of digital impressions in basic aspects. ![]() It may be distorted during the process and the computer then smooths everything out, which makes you feel like you captured everything, but the truth is that you are missing some critical details that will end up in a poorly fitting restoration. However, measuring the quality of the 3D surface model is not as easy as simply looking it over, because sometimes a good-looking model does not equal a good quality of scan data. The trend of increasing use of intraoral scanners in dentists' daily routine has led to the need to properly assess the data quality of intraoral digital impressions. These point clouds are then being processed and create a 3D surface model. They project a light source onto the dental arch and the images will be captured by imaging sensors that are processed by the scanning software, which generates point clouds. Intraoral scanners are used for capturing the direct optical impressions of patients’ teeth. With the rise of digitalization in dentistry, intraoral scanners and digital impressions have been widely adopted by many clinicians. ![]()
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