Abstract
PurposeThe purpose of this study was to evaluate the clinical accuracy of the fusion of intra-oral scans in cone-beam computed tomography (CBCT) scans using two commercially available software packages.Materials and methodsTen dry human skulls were subjected to structured light scanning, CBCT scanning, and intra-oral scanning. Two commercially available software packages were used to perform fusion of the intra-oral scans in the CBCT scan to create an accurate virtual head model: IPS CaseDesigner® and OrthoAnalyzer™. The structured light scanner was used as a gold standard and was superimposed on the virtual head models, created by IPS CaseDesigner® and OrthoAnalyzer™, using an Iterative Closest Point algorithm. Differences between the positions of the intra-oral scans obtained with the software packages were recorded and expressed in six degrees of freedom as well as the inter- and intra-observer intra-class correlation coefficient.ResultsThe tested software packages, IPS CaseDesigner® and OrthoAnalyzer™, showed a high level of accuracy compared to the gold standard. The accuracy was calculated for all six degrees of freedom. It was noticeable that the accuracy in the cranial/caudal direction was the lowest for IPS CaseDesigner® and OrthoAnalyzer™ in both the maxilla and mandible. The inter- and intra-observer intra-class correlation coefficient showed a high level of agreement between the observers.Clinical relevanceIPS CaseDesigner® and OrthoAnalyzer™ are reliable software packages providing an accurate fusion of the intra-oral scan in the CBCT. Both software packages can be used as an accurate fusion tool of the intra-oral scan in the CBCT which provides an accurate basis for 3D virtual planning.
Highlights
Three-dimensional (3D) virtual treatment planning is becoming an increasingly important tool within the fields of oral andClin Oral Invest (2021) 25:77–85Several methods are described in literature to solve the issue of a distorted occlusal area within the cone-beam computed tomography (CBCT) scan
The purpose of this study is to assess the accuracy of the replacement of distorted dentition in CBCT scans with accurate digital dental models, using commercially available software
The tested software packages, IPS CaseDesigner® and OrthoAnalyzerTM, showed a high level of accuracy compared to the gold standard
Summary
Three-dimensional (3D) virtual treatment planning is becoming an increasingly important tool within the fields of oral andClin Oral Invest (2021) 25:77–85Several methods are described in literature to solve the issue of a distorted occlusal area within the CBCT scan. Three-dimensional (3D) virtual treatment planning is becoming an increasingly important tool within the fields of oral and. Swennen et al [13] proposed a triple CBCT scan method using voxel-based registration to capture accurate occlusal surfaces. This requires the patient to be scanned twice, increasing the radiation exposure. The use of different imaging modalities (CBCT and plaster cast/intra-oral scans) allows surgeons and technicians to virtually plan and practice several treatments before the actual treatment takes place. Three-dimensional virtual orthognathic surgical planning is a widely used tool to plan and simulate different treatment options [3]. Orthodontic virtual setups can be created and used to assess the accuracy of the treatment. Orthodontic virtual setups can be created and used to assess the accuracy of the treatment. [21] Digitally created indirect bonding trays can be used for optimal bracket placement and an enhancement of the workflow [22]
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