Accuracy of provisional crowns made using stereolithography apparatus and subtractive technique
- Authors
- Kang, Seen-Young; Park, Jung-Hyun; Kim, Ji-Hwan; Kim, Woong-Chul
- Issue Date
- 10월-2018
- Publisher
- KOREAN ACAD PROSTHODONTICS
- Keywords
- Stereolithography apparatus; Subtractive technology; Provisional crown; CAD/CAM system
- Citation
- JOURNAL OF ADVANCED PROSTHODONTICS, v.10, no.5, pp.354 - 360
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- JOURNAL OF ADVANCED PROSTHODONTICS
- Volume
- 10
- Number
- 5
- Start Page
- 354
- End Page
- 360
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/72590
- DOI
- 10.4047/jap.2018.10.5.354
- ISSN
- 2005-7806
- Abstract
- PURPOSE. To compare and analyze trueness and precision of provisional crowns made using stereolithography apparatus and subtractive technology. MATERIALS AND METHODS. Digital impressions were made using a master model and an intraoral scanner and the crowns were designed with CAD software; in total, 22 crowns were produced. After superimposing CAD design data and scan data using a 3D program, quantitative and qualitative data were obtained for analysis of trueness and precision. Statistical analysis was performed using normality test combined with Levene test for equal variance analysis and independent sample t-test. Type 1 error was set at 0.05. RESULTS. Trueness for the outer and inner surfaces of the SLA crown (SLAG) were 49.6 +/- 9.3 mu m and 22.5 +/- 5.1 mu m, respectively, and those of the subtractive crown (SUBC) were 31.8 +/- 7.5 mu m and 14.6 +/- 1.2 mu m, respectively. Precision values for the outer and inner surfaces of the SLAC were 18.7 +/- 6.2 mu m and 26.9 +/- 8.5 pm, and those of the SUBC were 25.4 +/- 3.1 mu m and 13.8 +/- 0.6 mu m, respectively. Trueness values for the outer and inner surfaces of the SLAC and SUBC showed statistically significant differences (P<.001). Precision for the inner surface showed significance (P<.03), whereas that for the outer surface showed no significance (P<.58). CONCLUSION. The study demonstrates that provisional crowns produced by subtractive technology are superior to crowns fabricated by stereolithography in terms of accuracy.
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Collections - College of Health Sciences > Division of Health Policy and Management > 1. Journal Articles
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