Next Article in Journal
Addendum: Zhao, X.; et al. Properties of Foamed Mortar Prepared with Granulated Blast-furnace Slag. Materials 2015, 8(2), 462-473
Previous Article in Journal
A Theoretical Study of the Binding of [Re6Se8(OH)2(H2O)4] Rhenium Clusters to DNA Purine Base Guanine
Article Menu

Export Article

Open AccessArticle
Materials 2015, 8(7), 3945-3957; doi:10.3390/ma8073945

Accuracy of Digital Impressions and Fitness of Single Crowns Based on Digital Impressions

Department of Prosthodontics, Peking University School and Hospital of Stomatology, Beijing 100081, China
Department of General dentistry, Peking University School and Hospital of Stomatology, Beijing 100081, China
School of Material Science and Engineering, Tsinghua University, Beijing 100081, China
Authors to whom correspondence should be addressed.
Academic Editor: Maryam Tabrizian
Received: 27 April 2015 / Revised: 23 May 2015 / Accepted: 19 June 2015 / Published: 29 June 2015
View Full-Text   |   Download PDF [1074 KB, uploaded 29 June 2015]   |  


In this study, the accuracy (precision and trueness) of digital impressions and the fitness of single crowns manufactured based on digital impressions were evaluated. #14-17 epoxy resin dentitions were made, while full-crown preparations of extracted natural teeth were embedded at #16. (1) To assess precision, deviations among repeated scan models made by intraoral scanner TRIOS and MHT and model scanner D700 and inEos were calculated through best-fit algorithm and three-dimensional (3D) comparison. Root mean square (RMS) and color-coded difference images were offered. (2) To assess trueness, micro computed tomography (micro-CT) was used to get the reference model (REF). Deviations between REF and repeated scan models (from (1)) were calculated. (3) To assess fitness, single crowns were manufactured based on TRIOS, MHT, D700 and inEos scan models. The adhesive gaps were evaluated under stereomicroscope after cross-sectioned. Digital impressions showed lower precision and better trueness. Except for MHT, the means of RMS for precision were lower than 10 μm. Digital impressions showed better internal fitness. Fitness of single crowns based on digital impressions was up to clinical standard. Digital impressions could be an alternative method for single crowns manufacturing. View Full-Text
Keywords: digital impressions; accuracy; fitness digital impressions; accuracy; fitness

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Yang, X.; Lv, P.; Liu, Y.; Si, W.; Feng, H. Accuracy of Digital Impressions and Fitness of Single Crowns Based on Digital Impressions. Materials 2015, 8, 3945-3957.

Show more citation formats Show less citations formats

Related Articles

Article Metrics

Article Access Statistics



[Return to top]
Materials EISSN 1996-1944 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top