Abstract
Statement of problem
Studies on the intaglio surface trueness and margin quality of interim crowns fabricated
using stereolithography apparatus (SLA) 3D printing depending on the type of tooth
and the build angle are lacking.
Purpose
The purpose of this in vitro study was to evaluate the effects of intaglio surface
trueness and margin quality in accordance with the type of tooth and the build angles
of interim crowns fabricated by SLA 3D printing.
Material and methods
A definitive cast was digitized for computer-aided design (CAD) reference model (CRM) production,
and the interim crown was designed by using a CAD software program and saved as a
standard tessellation language (STL) file. For CAD test model (CTM) production, 3D
printing was performed in accordance with the type of tooth (maxillary central incisor,
first premolar, and first molar) and the build angles (90, 120, 135, 150, 180, 210,
225, 240, and 270 degrees) (n=17). The intaglio surface of the printed interim crown
was digitized. CRM and CTM used 3D inspection software to analyze the intaglio surface
superimposition and root mean square (RMS). In addition, a grading system was developed
to evaluate the margin quality, which was assessed visually. Statistical analysis
was performed using 1-way ANOVA, 2-way ANOVA, and the Tukey honestly significant difference
post hoc test (α=.05).
Results
The RMS value showed significant differences in the various types of tooth as per
the build angles (P<.001). The central incisor and first premolar showed the lowest RMS value at 180
degrees, and the first molar showed the lowest RMS value at 210 degrees. The margin
quality was significantly different as per the build angle in the central incisor
and the first molar (P<.05). The worst margin quality observed in all teeth was at 180 degrees.
Conclusions
In 3D printing, the build angle affected the intaglio surface trueness of the interim
crown. The recommended build angle for interim crowns fabricated using 3D printing
is between 150 and 210 degrees. The tooth type affected the margin quality according
to the build angle, except in the case of first premolars.
To read this article in full you will need to make a payment
Purchase one-time access:
Academic & Personal: 24 hour online accessCorporate R&D Professionals: 24 hour online accessOne-time access price info
- For academic or personal research use, select 'Academic and Personal'
- For corporate R&D use, select 'Corporate R&D Professionals'
Subscribe:
Subscribe to Journal of Prosthetic DentistryAlready a print subscriber? Claim online access
Already an online subscriber? Sign in
Register: Create an account
Institutional Access: Sign in to ScienceDirect
References
- Digital dentistry: an overview of recent developments for CAD-CAM generated restorations.Br Dent J. 2008; 204: 505-511
- 3D printing with polymers: challenges among expanding options and opportunities.Dent Mater. 2016; 32: 54-64
- Build angle: does it influence the accuracy of 3D-printed dental restorations using digital light-processing technology?.Int J Prosthodont. 2017; 30: 182-188
- Effects of build direction on the mechanical properties of 3D-printed complete coverage interim dental restorations.J Prosthet Dent. 2016; 115: 760-767
- Accuracy of computer-aided design-computer-aided manufacturing-generated dental casts based on intraoral scanner data.J Am Dent Assoc. 2014; 145: 1133-1140
- A study on the machining accuracy of dental digital method focusing on dental inlay.J Adv Prosthodont. 2018; 10: 321-327
- Evaluation of the fit of metal copings fabricated using stereolithography.J Prosthet Dent. 2018; 120: 693-698
- Tool path generation and tolerance analysis for free-form surfaces.Int J Mach Tools Manuf. 2007; 47: 689-696
- Evaluation of topology-optimized lattice structures manufactured via selective laser melting.Mater Des. 2018; 143: 27-37
- Comparative study of the trueness of the inner surface of crowns fabricated from three types of lithium disilicate blocks.Appl Sci. 2019; 9: 1798
- In vivo precision of conventional and digital methods of obtaining complete-arch dental impressions.J Prosthet Dent. 2016; 115: 313-320
- A method for registration of 3D shapes.IEEE Trans Pattern Anal Mach Intell. 1992; 14: 239-256
- Effect of abutment superimposition process of dental model scanner on final virtual model.J Korean Acad Prosthodont. 2019; 57: 203-210
- Accuracy of digital impression made from different elastomeric impression materials: three-dimensional superimpositional analysis.J Dent Hyg Sci. 2014; 14: 94-100
- In vitro evaluation methods on adaptation of fixed dental prosthesis.J Dent Rehabil Appl Sci. 2017; 33: 63-70
- Comparison of digital intraoral scanner reproducibility and image trueness considering repetitive experience.J Prosthet Dent. 2018; 119: 225-232
- Digital versus conventional implant impressions for partially edentulous arches: an evaluation of accuracy.J Prosthet Dent. 2018; 119: 574-579
- Internal fit of bridge patterns fabricated by a 3D printing technique.Korean J Dent Mat. 2014; 41: 239-244
- Trueness analysis of zirconia crowns fabricated with 3-dimensional printing.J Prosthet Dent. 2019; 121: 285-291
- Accuracy of 3-unit fixed dental prostheses fabricated on 3D-printed casts.J Prosthet Dent. 2020; 123: 135-142
- The effect of build angle on the tissue surface adaptation of maxillary and mandibular complete denture bases manufactured by digital light processing.J Prosthet Dent. 2020; 123: 473-482
- Accuracy of printed dental models made with 2 prototype technologies and different designs of model bases.Am J Orthod Dentofacial Orthop. 2017; 151: 1178-1187
- 3D printed versus conventionally cured provisional crown and bridge dental materials.Dent Mater. 2018; 34: 192-200
- Precision and trueness of dental models manufactured with different 3-dimensional printing techniques.Am J Orthod Dentofacial Orthop. 2018; 15: 144-153
- Technical note: the use of 3D printing in dental anthropology collections.Am J Phys Anthropol. 2018; 167: 400-406
- Mechanical properties, accuracy, and cytotoxicity of UV-polymerized 3D printing resins composed of Bis-EMA, UDMA, and TEGDMA.J Prosthet Dent. 2020; 123: 349-354
- Direction of improvement of reproducibility through shape distortion of fused deposition 3D printing.J Basic Design Art. 2018; 19: 195-204
- Factors influencing the dimensional accuracy of 3D-printed full-coverage dental restorations using stereolithography technology.Int J Prosthodont. 2016; 29: 503-510
- A study on the comparison mechanical properties of 3D printing prototypes with laminating direction.J Korean Soc Manuf Technol Eng. 2015; 24: 334-341
- Effect of print layer height and printer type on the accuracy of 3-dimensional printed orthodontic models.Am J Orthod Dentofacial Orthop. 2017; 152: 557-565
- Dentistry-digitizing devices for CAD/CAM systems for indirect dental restorations-test methods for assessing accuracy.International Organization for Standardization, Geneva2015 (ISO Store Order: OP-1106001 (date 2015-07). Available at:)
Article info
Publication history
Published online: August 15, 2020
Footnotes
Supported by the Technology Innovation Program or Industrial Strategic Technology Development Program (10077743). The development of the handpiece design for the air turbine and endodontic treatment funded by the Ministry of Trade, Industry & Energy(MOTIE, Korea); and Industrial Strategic Technology Development Program (10062635, New hybrid milling machine with a resolution of less than 10 μm development, using open CAD-CAM S/W integrated platforms for 1-day prosthetic treatment of 3D smart medical care system) funded by the Ministry of Trade, Industry & Energy (MOTIE, Korea); and Korea Institute for Advancement of Technology (KIAT) through the National Innovation Cluster R&D program (P0006691).
Identification
Copyright
© 2020 by the Editorial Council for The Journal of Prosthetic Dentistry.
