Effect of Preparation Depth for an Endocrown on the Trueness and Precision of Intraoral Digital Scanners | ||||
| Ain Shams Dental Journal | ||||
| Article 7, Volume 29, Issue 1, March 2023, Page 32-42 PDF (986.86 K) | ||||
| Document Type: Original articles | ||||
| DOI: 10.21608/asdj.2022.144814.1126 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
Mazen Atout  1; Amina Hamdy2; Ghada Abdel Fattah 2
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| 1Nuclear Materials Authority | ||||
| 2Fixed Prosthodontics Department, Faculty of Dentistry, Ain Shams University. | ||||
| Abstract | ||||
| Purpose: The aim was to evaluate the trueness and precision of four different intraoral scanners for scanning endocrown preparations with two depths (4 mm and 6 mm). Materials and methods: Tooth preparation for an endocrown was done and scans were divided according to depth of the preparation. The tooth scans were divided into 2 groups, Group A an endocrown with 6 mm depth and a butt joint margin of 2 mm thickness all around, Group B an endocrown with 4 mm depth, then each group was divided into 4 subgroups according to the intraoral scanner used for scanning, Omnicam v. 4.4.4, Omnicam v.4.4.6, Medit i500, 3Shape Trios 3 respectively, Reference scan were obtained from InEoS X5 extraoral scanner, and 10 test scans of each cavity were made with 4 IOSs. The STL files obtained were compared to reference models (trueness) and within each test group (precision) using a 3D analysis software program (Geomagic Control X). Obtained data were analyzed with three-way ANOVA. Results. Regarding trueness, Three-way ANOVA revealed significant differences between the different types of scanners (p < 0.001) (Omnicam 4.4.4: 56.53 ± 6.08 Omnicam 4.6.2: 47.68 ± 12.11 Medit i500: 52.07 ± 8.92 Trios 3: 38.81 ± 8.72). Preparation depth showed significant influence on the trueness (p < 0.001) (6 mm depth 55.70 ± 8.22, 4 mm depth 41.84 ± 9.46). For precision three-way ANOVA revealed significant differences between the different types of scanners (p < 0.001). Preparation depth also had significant influence on the precision (p < 0.001). | ||||
| Keywords | ||||
| Endocrown; Intraoral Scanners; Accuracy; Depth | ||||
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