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Mei-Yang Huang1, 3
, Keunbada Son2, 3, Wan-Sun Lee3, Kyu-Bok Lee1, 3
, Keunbada Son2, 3, Wan-Sun Lee3, Kyu-Bok Lee1, 3
Abstract
Purpose
The purpose of this study was to evaluate the accuracy of three types of intraoral scanners and the accuracy of the single abutment and bridge abutment model.
Materials and methods
In this study, a single abutment, and a bridge abutment with missing first molar was fabricated and set as the reference model. The reference model was scanned with an industrial three-dimensional scanner and set as reference scan data. The reference model was scanned five times using the three intraoral scanners (CS3600, CS3500, and EZIS PO). This was set as the evaluation scan data. In the three-dimensional analysis (Geomagic control X), the divided abutment region was selected and analyzed to verify the scan accuracy of the abutment. Statistical analysis was performed using SPSS software (α = .05). The accuracy of intraoral scanners was compared using the Kruskal-Wallis test and post-test was performed using the Pairwise test. The accuracy difference between the single abutment model and the bridge abutment model was analyzed by the Mann-Whitney U test.
Results
The accuracy according to the intraoral scanner was significantly different (P < .05). The trueness of the single abutment model and the bridge abutment model showed a statistically significant difference and showed better trueness in the single abutment (P < .05). There was no significant difference in the precision (P = .616).
Figures and Tables
Fig. 2
Comparison of trueness according to intraoral scanner. (A) Single abutment, (B) Bridge abutment. Different letters indicate significant differences (P < .05). Circle points indicate outliers.
Fig. 3
Comparison of precision according to intraoral scanner. (A) Single abutment, (B) Bridge abutment. Different letters indicate significant differences (P < .05). Circle points indicate outliers.
Notes
This work was supported by Institute for Information & Communications Technology Promotion (IITP) grant funded by the Korea government (MSIP) (B0101-19-1081, Development of ICT based software platform and service technologies for medical 3D printing applications) and Industrial Strategic Technology Development Program (10062635, New hybrid milling machine with a resolution of less than 10 µm development, using open CAD/CAM S/W integrated platforms for one day prosthetic treatment of 3D smart medical care system) funded By the Ministry of Trade, Industry & Energy (MOTIE, Korea).
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