Abstract
Statement of problem
The nanoparticle jetting (NPJ) technique is a recently developed additive manufacturing
method that may have useful dental applications. The manufacturing accuracy and clinical
adaptation of zirconia monolithic crowns fabricated with NPJ are unknown.
Purpose
The purpose of this in vitro study was to compare the dimensional accuracy and clinical
adaptation of zirconia crowns fabricated with NPJ and those fabricated with subtractive
manufacturing (SM) and digital light processing (DLP).
Material and methods
Five standardized typodont right mandibular first molars were prepared for ceramic
complete crowns, and 30 zirconia monolithic crowns were fabricated using SM, DLP,
and NPJ (n=10) with a completely digital workflow. The dimensional accuracy at the
external, intaglio, and marginal areas was determined by superimposing the scanned
data and computer-aided design data of the crowns (n=10). Occlusal, axial, and marginal
adaptations were evaluated by using a nondestructive silicone replica and dual scanning
method. The 3-dimensional discrepancy was evaluated to determine clinical adaptation.
Differences among test groups were analyzed by using a MANOVA and the post hoc least
significant difference test for normally distributed data or the Kruskal-Wallis test
with Bonferroni correction for nonnormally distributed data (α=.05).
Results
Significant differences were found in the dimensional accuracy and clinical adaptation
among the groups (P<.001). The NPJ group had a lower overall root mean square (RMS) value for dimensional
accuracy (22.9 ±1.4 μm) than the SM (27.3 ±5.0 μm) and DLP (36.4 ±5.9 μm) groups (P<.001). The NPJ group had a lower external RMS value (23.0 ±3.0 μm) than the SM group
(28.9 ±5.4 μm) (P<.001) and equivalent marginal and intaglio RMS values than the SM group. The DLP
group had larger external (33.3 ±4.3 μm), intaglio (36.1 ±10.7 μm), and marginal (79.4
±12.9 μm) deviations than the NPJ and SM groups (P<.001). With regard to clinical adaptation, the marginal discrepancy was smaller in
the NPJ group (63.9 ±27.3 μm) than in the SM group (70.8 ±27.5 μm) (P<.001). No significant differences were found between the SM and NPJ groups in terms
of the occlusal (87.2 ±25.5 and 80.5 ±24.2 μm, respectively) and axial (39.1 ±19.7
and 38.4 ±13.7 μm, respectively) discrepancies. The DLP group had larger occlusal
(239.0 ±60.1 μm), axial (84.9 ±29.1 μm), and marginal (140.4 ±84.3 μm) discrepancies
than the NPJ and SM groups (P<.001).
Conclusions
Monolithic zirconia crowns fabricated using NPJ have higher dimensional accuracy and
clinical adaptation than those fabricated using SM or DLP.
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References
- Monolithic zirconia dental crowns. Internal fit, margin quality, fracture mode and load at fracture.Dent Mater. 2017; 33: 1012-1020
- A new classification system for all-ceramic and ceramic-like restorative materials.Int J Prosthodont. 2015; 28: 227-235
- Zirconia in dental prosthetics: a literature review.J Mater Res Technol. 2019; 8: 4956-4964
- Trends in computer-aided manufacturing in prosthodontics: a review of the available streams.Int J Dent. 2014; 2014: 783948
- Marginal adaptation and CAD-CAM technology: a systematic review of restorative material and fabrication techniques.J Prosthet Dent. 2018; 119: 545-551
- Randomized controlled within-subject evaluation of digital and conventional workflows for the fabrication of lithium disilicate single crowns. Part II: CAD-CAM versus conventional laboratory procedures.J Prosthet Dent. 2017; 118: 43-48
- Advancements in CAD/CAM technology: options for practical implementation.J Prosthodont Res. 2016; 60: 72-84
- A review of dental CAD/CAM: current status and future perspectives from 20 years of experience.Dent Mater J. 2009; 28: 44-56
- Three-dimensional trueness and margin quality of monolithic zirconia restorations fabricated by additive 3D gel deposition.J Prosthet Res. 2020; 64: 478-484
- Accuracy of metal 3D printed frameworks for removable partial dentures evaluated by digital superimposition.Dent Mater. 2022; 38: 309-317
- Materials in digital dentistry-A review.J Esthet Restor Dent. 2020; 32: 171-181
- Dimensional accuracy and clinical adaptation of ceramic crowns fabricated with the stereolithography technique.J Prosthet Dent. 2021; 125: 657-663
- The upcoming 3D-printing revolution in microfluidics.Lab Chip. 2016; 16: 1720-1742
- Trueness analysis of zirconia crowns fabricated with 3-dimensional printing.J Prosthet Dent. 2019; 121: 285-291
- Standard terminology for additive manufacturing—General principles and terminology. ISO/ASTM52900–15.ASTM Committee F42 on Additive Manufacturing Technologies, West Conshohocken, PA2009
- 3D-printing zirconia implants; a dream or a reality? An in-vitro study evaluating the dimensional accuracy, surface topography and mechanical properties of printed zirconia implant and discs.J Mech Behav Biomed Mater. 2017; 75: 521-528
- A digital micro-mirror device-based system for the microfabrication of complex, spatially patterned tissue engineering scaffolds.J Biomed Mater Res A. 2006; 77: 396-405
- Effect of the volume fraction of zirconia suspensions on the microstructure and physical properties of products produced by additive manufacturing.Dent Mater. 2019; 35: e97-e106
- Fracture resistance of additively manufactured zirconia crowns when cemented to implant supported zirconia abutments: an in vitro study.J Prosthodont. 2019; 28: 893-897
- The flexural strength and flexural modulus of stereolithography additively manufactured zirconia with different porosities.J Prosthodont. 2022; 31: 434-440
- Load-bearing capacity of CAD/CAM 3D-printed zirconia, CAD/CAM milled zirconia, and heat-pressed lithium disilicate ultra-thin occlusal veneers on molars.Dent Mater. 2020; 36: e109-e116
- Effect of printing layer thickness on the trueness of 3-unit interim fixed partial dentures.J Prosthet Dent. 27 May 2022; ([Epub ahead of print.])https://doi.org/10.1016/j.prosdent.2022.04.015
- An in vitro comparison of the marginal and internal adaptation of ultrathin occlusal veneers made of 3D-printed zirconia, milled zirconia, and heat-pressed lithium disilicate.J Prosthet Dent. 2022; 128: 709-715
- Trueness and precision of 3D-printed versus milled monolithic zirconia crowns: an in vitro study.J Dent. 2021; 113: 103792
- Additive manufacturing of zirconia ceramics by material jetting.J Eur Ceram Soc. 2021; 41: 5292-5306
- 3D Printing in digital prosthetic dentistry: an overview of recent developments in additive manufacturing.J Clin Med. 2021; 10: 2010
- Accuracy of additively manufactured zirconia four-unit fixed dental prostheses fabricated by stereolithography, digital light processing and material jetting compared with subtractive manufacturing.Dent Mater. 2022; 38: 1459-1469
- Mechanical properties and bond strength of additively manufactured and milled dental zirconia: a pilot study.J Prosthodont. 2022; 31: 629-634
- The glossary of prosthodontic terms: ninth edition.J Prosthet Dent. 2017; 117: e1-e105
- Internal and marginal discrepancies associated with stereolithography (SLA) additively manufactured zirconia crowns.J Prosthet Dent. 2020; 124: 730-737
- The estimation of cement film thickness by an in vivo technique.Br Dent J. 1971; 131: 107-111
- Dimensional changes from the sintering process and fit of Y-TZP copings: Micro-CT analysis.Dent Mater. 2017; 33: e405-e413
- Three-dimensional fit of self-glazed zirconia monolithic crowns fabricated by wet deposition.Dent Mater J. 2022; 41: 363-367
- Marginal and internal adaptation of milled cobalt-chromium copings.J Prosthet Dent. 2015; 114: 680-685
- X-ray tomography of additive-manufactured zirconia: Processing defects – strength relations.J Eur Ceram Soc. 2020; 40: 3200-3207
Article info
Publication history
Published online: May 20, 2023
Publication stage
In Press Corrected ProofFootnotes
Funding: This work was supported by the Beijing Natural Science Foundation (L222023) and Industry-University-Research Innovation Fund for Chinese Universities (2021ITA05007), China.
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© 2023 by the Editorial Council for The Journal of Prosthetic Dentistry.
