Journal article
Fit of interim crowns fabricated using photopolymer-jetting 3D printing
The Journal of prosthetic dentistry, Vol.118(2), pp.208-215
08/01/2017
DOI: 10.1016/j.prosdent.2016.10.030
PMID: 28089333
Abstract
The fit of interim crowns fabricated using 3-dimensional (3D) printing is unknown.
The purpose of this in vitro study was to evaluate the fit of interim crowns fabricated using photopolymer-jetting 3D printing and to compare it with that of milling and compression molding methods.
Twelve study models were fabricated by making an impression of a metal master model of the mandibular first molar. On each study model, interim crowns (N=36) were fabricated using compression molding (molding group, n=12), milling (milling group, n=12), and 3D polymer-jetting methods. The crowns were prepared as follows: molding group, overimpression technique; milling group, a 5-axis dental milling machine; and polymer-jetting group using a 3D printer. The fit of interim crowns was evaluated in the proximal, marginal, internal axial, and internal occlusal regions by using the image-superimposition and silicone-replica techniques. The Mann-Whitney U test and Kruskal-Wallis tests were used to compare the results among groups (α=.05).
Compared with the molding group, the milling and polymer-jetting groups showed more accurate results in the proximal and marginal regions (P<.001). In the axial regions, even though the mean discrepancy was smallest in the molding group, the data showed large deviations. In the occlusal region, the polymer-jetting group was the most accurate, and compared with the other groups, the milling group showed larger internal discrepancies (P<.001).
Polymer-jet 3D printing significantly enhanced the fit of interim crowns, particularly in the occlusal region.
Details
- Title: Subtitle
- Fit of interim crowns fabricated using photopolymer-jetting 3D printing
- Creators
- Hang-Nga Mai - Kyungpook National UniversityKyu-Bok Lee - Kyungpook National UniversityDu-Hyeong Lee - Kyungpook National University
- Resource Type
- Journal article
- Publication Details
- The Journal of prosthetic dentistry, Vol.118(2), pp.208-215
- DOI
- 10.1016/j.prosdent.2016.10.030
- PMID
- 28089333
- NLM abbreviation
- J Prosthet Dent
- ISSN
- 0022-3913
- eISSN
- 1097-6841
- Language
- English
- Date published
- 08/01/2017
- Academic Unit
- Prosthodontics
- Record Identifier
- 9984914146302771
Metrics
2 Record Views