Three-Dimensional Accuracy of Virtual Casts Obtained from Intra Oral Scanners and Scannable Impression for Three Units Bridge
| Autor: | Ashraf Measar Mohamad, Ammar Kh. Al-Noori |
|---|---|
| Jazyk: | Arabic<br />English |
| Rok vydání: | 2023 |
| Předmět: | |
| Zdroj: | Al-Rafidain Dental Journal, Vol 23, Iss 1, Pp 9-24 (2023) |
| Druh dokumentu: | article |
| ISSN: | 1812-1217 1998-0345 |
| DOI: | 10.33899/rdenj.2021.130907.1124 |
| Popis: | Aims: For evaluation and comparison of the accuracy of different methods for virtual models obtaining techniques. Materials and methods: The reference cast was preparedfor 3-unit fixed bridge. Four Groups with 8 samples in each group. Stone models werepoured from conventional impressions. Digital impressions of the reference cast werecreated using two types of intraoral scanner defers in scanning technology and directimpression digitization. Reference cast, stone casts and scannable impressions weresubsequently scanned using a laboratory optical scanner; files were exported in astereolithography file format. All datasets were superimposed using 3D analysis softwareto evaluate the accuracy (trueness and precession). An independent-samples median testsummary was performed to compare trueness among the four impression groups. Theindependent-samples Kruskal-Wallis test was performed to evaluate the precession of eachgroup of impression techniques .Results: with regard to trueness, the Trios Group and Medit i500 Group had the highest trueness of all groups, with no significant differencesbetween them, followed by the conventional impression group, then the scannableimpression group which had the largest deviation from the reference model. None of thegroups showed significant differences in precession. Conclusions: Intraoral scanners havea high accuracy level for both trueness and precession. Scannable impression directdigitization showed significantly higher deviation than conventional impression stone castswith clinically acceptable levels of accuracy. |
| Databáze: | Directory of Open Access Journals |
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