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Trueness of 3D printed partial denture frameworks: build orientations and support structure density parameters
Mostafa Omran Hussein1, Lamis Ahmed Hussein2
1Department of Prosthodontic Sciences, College of Dentistry in Ar Rass, Qassim University, El-Qassim, Saudi Arabia.
The Journal of Advanced Prosthodontics
|July 20, 2022
Summary
Build orientation significantly impacts the accuracy of 3D printed removable partial denture (RPD) frameworks, with specific angles yielding better results. Support structure density had no considerable effect on RPD framework accuracy.
Area of Science:
- Dental Materials Science
- Additive Manufacturing
- Biomedical Engineering
Background:
- Removable partial dentures (RPDs) are crucial for restoring function and aesthetics.
- 3D printing offers potential for customized RPD framework fabrication.
- Optimizing printing parameters is essential for achieving high-accuracy RPDs.
Purpose of the Study:
- To evaluate how build orientation and support structure density affect the trueness of 3D printed RPD frameworks.
- To determine optimal printing parameters for accurate RPD framework production.
Main Methods:
- Designed and 3D printed 47 RPD frameworks using digital light processing (DLP) at varying build orientations and support densities.
- Compared 3D printed frameworks to virtual models using metrology software to quantify deviations.
- Analyzed accuracy data using ANOVA and t-tests.
Main Results:
- A 135-degree build orientation minimized deviation in maxillary RPD frameworks (tooth 26 clasp arms).
- A 150-degree build orientation resulted in the least deviation for mandibular RPD frameworks (tooth 44 rest, tooth 45 clasp arm).
- Varying support structure densities did not significantly impact framework accuracy.
Conclusions:
- Build orientation critically influences the accuracy of 3D printed RPD frameworks.
- Specific angles (135° for maxillary, 150° for mandibular) enhance RPD framework trueness.
- Support structure density is not a significant factor in RPD framework accuracy.
