Evaluation of different approaches for using a laser scanner in digitization of dental impressions
- Authors
- Lee, Wan-Sun; Kim, Woong-Chul; Kim, Hae-Young; Kim, Wook-Tae; Kim, Ji-Hwan
- Issue Date
- 2월-2014
- Publisher
- KOREAN ACAD PROSTHODONTICS
- Keywords
- Digitization of impression bodies; Dental CAD/CAM system; Zirconia three-unit FPDs; Marginal gap; Internal gap
- Citation
- JOURNAL OF ADVANCED PROSTHODONTICS, v.6, no.1, pp.22 - 29
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- JOURNAL OF ADVANCED PROSTHODONTICS
- Volume
- 6
- Number
- 1
- Start Page
- 22
- End Page
- 29
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/99472
- DOI
- 10.4047/jap.2014.6.1.22
- ISSN
- 2005-7806
- Abstract
- PURPOSE. This study aimed to investigate the potential clinical application of digitized silicone rubber impressions by comparing the accuracy of zirconia 3-unit fixed partial dentures (FPDs) fabricated from 2 types of data (working model and impression) obtained from a laser scanner. MATERIALS AND METHODS. Ten working models and impressions were prepared with epoxy resin and vinyl polysiloxane, respectively. Based on the data obtained from the laser scanner (D-700; 3Shape A'S, Copenhagen, Denmark), a total of 20 zirconia frameworks were prepared using a dental CAD/CAM system (DentalDesigner; 3shape A'S, Copenhagen, Denmark / Ener-mill, Dentaim, Seoul, Korea). The silicone replicas were sectioned into four pieces to evaluate the framework fit. The replicas were imaged using a digital microscope, and the fit of the reference points (P1, P2, P3, P4, P5, P6, and P7) were measured using the program in the device. Measured discrepancies were divided into 5 categories of gaps (MG, CG, AWG, AOTG, OG). Data were analyzed with Student's t-test (alpha=0.05), repeated measures ANOVA and two-way ANOVA (alpha=0.05). RESULTS. The mean gap of the zirconia framework prepared from the working models presented a narrower discrepancy than the frameworks fabricated from the impression bodies. The mean of the total gap in premolars (P=.003) and molars (P=.002) exhibited a statistical difference between two groups. CONCLUSION. The mean gap dimensions of each category showed statistically significant difference. Nonetheless, the digitized impression bodies obtained with a laser scanner were applicable to clinical settings, considering the clinically acceptable marginal fit (120 mu m).
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - College of Health Sciences > Division of Health Policy and Management > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.