A new technique for testing accuracy and sensitivity of digital bite registration: A prospective comparative study - 22/08/21
, Farhad SalmanpourBienvenue sur EM-consulte, la référence des professionnels de santé.
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| pages | 8 |
| Iconographies | 4 |
| Vidéos | 0 |
| Autres | 0 |
Highlights |
• | Intraoral scanners (IOS) have become an integral part of orthodontic practice. |
• | IOS allows to articulate digital models automatically or manually. |
• | In this study, the accuracy of the IOS device articulation was evaluated using a new 3D method. |
• | The IOS articulation technique can be used as an alternative to traditional bite registration methods. However, deviations in the micron level should be considered in sensitive dental procedures. |
Summary |
Introduction |
Intraoral scanners (IOS) use certain algorithms to provide articulations of the upper and lower digital models. The study was primarily designed to test the accuracy and sensitivity of these virtual articulations. The secondary objective was to compare virtual occlusal recording to traditional methods.
Materials and methods |
A total of one hundred and sixty bite registrations (BR) were obtained from forty class I patients using four different methods. Samples were divided into four groups: Group 1: BR from wax, Group 2: BR from C type silicone, Group 3: BR from A type silicone, Group 4: Virtual BR created with Appliance Designer (Copenhagen, Denmark) software from the automatically articulated digital models. Traditional BRs of the first three groups were scanned and digitalized with IOS (3Shape TRIOS). Group 3 BRs were then taken as a reference and each of the BRs in Group 1, Group 2, and Group 4 were separately superimposed using Geomagic Control X. Numeric data such as Mpos (mean of positive deviations), Mneg (Mean of negative deviations), ITA (In total area), OTA (Out total area) were used in the comparison.
Results |
The values for OTA were: Group 1:57.0%, Group 2:28.4%, and Group 4:22.3% respectively. That meant a general deviation in thickness on nearly all of the occlusal registration surfaces. The Mpos values representing the discrepancy in thickness were Group 1:185.5μ, Group 2:82.7μ, and Group 4:72.2μ. The surface deviation of Group 1 was significantly different from the other groups (P<0.01).
Conclusion |
Virtual bite registrations could safely be used as an alternative to conventional BRs. The performance of wax as a bite registration material was far behind other methods.
Le texte complet de cet article est disponible en PDF.Keywords : Intraoral scanner, Interocclusal record, Bite registration materials, Virtual occlusal record, Digital workflow
Plan
Vol 19 - N° 3
P. 425-432 - septembre 2021 Retour au numéro
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