Abstract
Analysis of Surface Curvature Influence on 3D Scanning Accuracy of Dental Castings
Highlights
A dental impression is a copy of an oral structure used to make a dental restoration, denture, or dental guide
Dental castings were digitalized with an industrial 3D scanner ATOS CORE, Gom company certified by PTB (The National Metrology Institute of Germany) and NIST (National Institute of Standards and Technology, USA). 3D scanning was performed in the measurement laboratory in controlled temperature conditions 22 ± 1 °C and relative humidity 55 % ± 10 %
After comparison with the reference model and reading the positive and negative deviations for each casting, the map was obtained which shows in which frequency the maximum deviations appear on each tooth and in which area
Summary
A dental impression is a copy of an oral structure used to make a dental restoration, denture, or dental guide. Surgical (dental) guides are medical fixtures that are used to determine the direction and depth of drilling when placing dental implants [1, 2]. An accurate impression is crucial for making dental guides that fit the patient’s dental anatomy well. Errors in manufacturing the impression can cause mechanical and biological complications due to incorrect implant positioning. In the research [3] it is stated that deviations of all technical parameters in the design of dental guides are not yet known, which may results in a total deviation of up to ± 2 mm. One study [6] states the positions on the teeth (premolars and molars) where the largest differences in the acquired data are between the digitization of the casting and the direct intraoral 3D image
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