Abstract
The aim of this study was to evaluate the accuracy in volumetric measurements obtained on an experimental model using an intraoral scanner and a gravimetric method. Three identical partial dentate maxillary acrylic models with three fabricated alveolar defects, in anterior and posterior regions, were scanned using an intraoral scanner (20 scans/defects). The defects differed in terms of size and distance of neighbouring teeth. As references, replicas of each defect were created using a dimensional stable silicone impression material. After measuring the mass of each replica, the volume was calculated by dividing the mass of each replica by the density of the impression material. The defects had a volume, according to the gravimetric method, ranging from 40.5 to 143.7 mm3. The scans were imported to metrology software for analyses. Accuracy was determined in terms of trueness and precision. The mean trueness for all defect types was 0.168 mm3 (SD 0.691, range 2.82). There was no statistical significant difference between the mean trueness for all defects measured (p = 0.910). The mean precision for all defect types was 0.147 mm3 (SD 0.524, range 2.86). There were no statistical significant differences between the dental models in regard to mean precision (p = 0.401), however, there were statistical significant differences between defects in position 1 and 2 (p = 0.002) and 1 and 3 (p = 0.001). Based on the findings of this study, the intraoral scanner utilized in the current study presented an acceptable level of accuracy when measuring volume of defects.
Highlights
Surgical interventions in oral and maxillofacial surgery often engage both soft and hard tissue and they often result in tissue alteration
Various methods have been described for the measurement of soft and hard tissue alterations, including conventional X-rays [1], computer tomography (CT) [2], stereoscopic imaging [3], optical scanning [4,5,6,7,8,9,10,11], direct measurements intraorally or on casts [2, 12], or mapping by ultrasonic assessments [13, 14]
There was a higher degree of precision when the scanning started with covering the palatal surfaces or in a back and forth manner [20]. These findings demonstrated that the scanning technique itself seems to have an impact on the accuracy of the intraoral 3D scanner (IOS)
Summary
Surgical interventions in oral and maxillofacial surgery often engage both soft and hard tissue and they often result in tissue alteration. Various methods have been described for the measurement of soft and hard tissue alterations, including conventional X-rays [1], computer tomography (CT) [2], stereoscopic imaging [3], optical scanning [4,5,6,7,8,9,10,11], direct measurements intraorally or on casts [2, 12], or mapping by ultrasonic assessments [13, 14]. The techniques involving ionizing radiation may be questioned due to their invasiveness and the need for radiation exposure. These disadvantages may be compensated by the use of other techniques such as optical scanning and clinical photographs. The intraoral 3D scanner (IOS) itself has expected technology-related errors
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
