Repeatability and reproducibility of individual abutment impression, assessed with a blue light scanner.
- Author:
Jin Hun JEON
1
;
Dong Yeon KIM
;
Jae Jun LEE
;
Ji Hwan KIM
;
Woong Chul KIM
Author Information
- Publication Type:Original Article
- Keywords: Blue light scanner; Repeatability; Reproducibility; Color-difference-map
- MeSH: Bicuspid; Ceramics; Crowns; Molar; Tooth
- From:The Journal of Advanced Prosthodontics 2016;8(3):214-218
- CountryRepublic of Korea
- Language:English
- Abstract: PURPOSE: We assessed the repeatability and reproducibility of abutment teeth dental impressions, digitized with a blue light scanner, by comparing the discrepancies in repeatability and reproducibility values for different types of abutment teeth. MATERIALS AND METHODS: To evaluate repeatability, impressions of the canine, first premolar, and first molar, prepared for ceramic crowns, were repeatedly scanned to acquire 5 sets of 3-dimensional data via stereolithography (STL) files. Point clouds were compared and the error sizes were measured (n=10, per type). To evaluate reproducibility, the impressions were rotated by 10-20° on the table and scanned. These data were compared to the first STL data and the error sizes were measured (n=5, per type). One-way analysis of variance was used to assess the repeatability and reproducibility of the 3 types of teeth, and Tukey honest significant differences (HSD) multiple comparison test was used for post hoc comparisons (α=.05). RESULTS: The differences with regard to repeatability were 4.5, 2.7, and 3.1 µm for the canine, premolar, and molar, indicating the poorest repeatability for the canine (P<.001). For reproducibility, the differences were 6.6, 5.8, and 11.0 µm indicating the poorest reproducibility for the molar (P=.007). CONCLUSION: Our results indicated that impressions of individual abutment teeth, digitized with a blue light scanner, had good repeatability and reproducibility.
