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KMID : 1023820200120040210
The Journal of Advanced Prosthodontics
2020 Volume.12 No. 4 p.210 ~ p.217
Evaluation of the effect of abutment preparation angles on the repeatability and reproducibility using a blue light model scanner
Kim Dong-Yeon

Abstract
PURPOSE: The purpose of the study is to evaluate the repeatability and reproducibility of the abutment angle using a blue light scanner.

MATERIALS AND METHODS: 0¡Æ, 6¡Æ, and 10¡Æ wax cast abutment dies were fabricated. Each of the silicone impression was produced using the replicable silicone. Each study die was constructed from the prepared replicable stone used for scans. 3-dimensional data was obtained after scanning the prepared study dies for the repeatability by using the blue light scanner. The prepared 3-dimensional data could have the best fit alignment using 3-dimensional software. For reproducibility, each abutment was used as the first reference study die, and then it was scanned five times per each. 3-dimensional software was used to perform the best fit alignment. The data obtained were analyzed using a nonparametric Kruskal-Wallis H test (¥á=.05), post hoc Mann-Whitney U test, and Bonferroni correction (¥á=.017).

RESULTS: The repeatability of 0¡Æ, 6¡Æ, and 10¡Æ abutments was 3.9, 4.4 and 4.7 ¥ìm, respectively. Among them, the 0¡Æ abutment had the best value while the 10¡Æ abutment showed the worst value. There was a statistically significant difference (P<.05). The reproducibility of 0¡Æ, 6¡Æ, and 10¡Æ abutments was 6.1, 5.5, and 5.3 ¥ìm, respectively. While the 10¡Æ abutment showed the best value, the 0¡Æ abutment showed the worst value. However, there was no statistically significant difference (P>.05).

CONCLUSION: In repeatability, the 0¡Æ abutment showed a positive result. In reproducibility, the 10¡Æ abutment achieved a positive result.
KEYWORD
Blue light scanner, Abutment, Repeatability, Reproducibility
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