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Improved mechanical performance and forming accuracy of ZrO2 fixed partial denture based on the digital light
Rongfang Zou1, Xiaohong Han1, Yang Meng1
1Qingdao Stomatological Hospital Affiliated to Qingdao University, Qingdao, 266001, Shandong, China.
Journal of the Mechanical Behavior of Biomedical Materials
|December 5, 2024
Summary
Digital Light Processing (DLP) 3D printing optimizes parameters for fabricating strong, precise zirconia fixed partial dentures. This advanced dental restoration technique shows great promise for personalized treatments.
Area of Science:
- Biomaterials Engineering
- Dental Materials Science
- Additive Manufacturing
Background:
- Fixed partial dentures are crucial for treating dentition defects.
- Digital Light Processing (DLP) 3D printing offers high precision and personalization in dental restoration.
- Current challenges include achieving sufficient strength in 3D printed dentures for clinical use.
Purpose of the Study:
- To optimize DLP 3D printing parameters for enhanced dimensional accuracy, reduced warpage, and improved surface quality of zirconia fixed partial dentures.
- To investigate the rheological and curing properties of the printing paste.
- To evaluate the mechanical properties of the fabricated dentures.
Main Methods:
- Optimization of printing parameters: exposure time and layer thickness.
- Rheological analysis of zirconia paste with varying dispersant concentrations.
- Mechanical property testing: Vickers hardness, flexural strength, and fracture toughness.
Main Results:
- Optimal printing parameters identified as 5s exposure time and 50 μm layer thickness, yielding superior dimensional accuracy and surface quality.
- Dispersant KOS 110 at 2% concentration provided optimal shear thinning for a 40% solid content slurry.
- Fabricated ZrO2 dentures exhibited Vickers hardness of 13.52 GPa, flexural strength of 940 MPa, and fracture toughness of 6.92 MPa·m1/2, surpassing human enamel and comparable to CAD/CAM ZrO2.
Conclusions:
- DLP 3D printing technology is effective for fabricating highly precise, personalized zirconia fixed partial dentures.
- The optimized process results in dentures with excellent mechanical properties suitable for clinical applications.
- This technology holds significant potential for advancements in stomatology and dental restorations.
