A novel CAD/CAM resin composite block with high mechanical properties
| Autor: | Long Ling, Yumeng Ma, Raj Malyala |
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| Rok vydání: | 2020 |
| Předmět: |
Ceramics
Materials science Surface Properties Composite number Modulus 02 engineering and technology Composite Resins 03 medical and health sciences 0302 clinical medicine Flexural strength Hot isostatic pressing Hardness Ultimate tensile strength Flexural Strength Materials Testing General Materials Science Composite material General Dentistry Flexural modulus 030206 dentistry 021001 nanoscience & nanotechnology Compressive strength Mechanics of Materials Vickers hardness test Computer-Aided Design Stress Mechanical 0210 nano-technology |
| Zdroj: | Dental materials : official publication of the Academy of Dental Materials. 37(7) |
| ISSN: | 1879-0097 |
| Popis: | Objective To determine the mechanical properties of a newly-developed CAD/CAM resin composite block and compare with other resin composite blocks and a polymer-infiltrated ceramic block. Methods Experimental composite block was formulated by our proprietary resin and filler technologies and cured via Hot Isostatic Pressing (HIP). Bar-shaped specimens (1 × 4×12 − 13 mm, n = 10) for flexural strength, flexural modulus and modulus of resilience were sectioned from block materials and measured in accordance to modified ISO-6872. Cylinder specimens for compressive strength (2 × 4 mm, n = 8) and for diametral tensile strength (6 × 3 mm, n = 8) were milled from the block materials and tested according to ASTM-D695 and ANSI/ADA-Specification #27, respectively. Block specimens (5 mm, n = 3) for Vickers hardness were polished and measured for five indentations on each specimen. The data was analyzed by one-way ANOVA and post-hoc Tukey tests (p ≤ 0.05). Results Experimental composite block showed higher or significantly higher flexural strength, flexural modulus, modulus of resilience, compressive strength, diametral tensile strength and Vickers hardness than the other commercially available block materials except Vita Enamic for flexural modulus and hardness and Cerasmart for modulus of resilience. Some positive correlations were observed among the different mechanical properties. Significance New composite block exhibited higher mechanical properties as compared to commercially available composite block materials. Superior mechanical properties for resin composite block materials were obtained by composite and curing processing technologies. Resin composite blocks with higher mechanical properties are good options for the fabrication of CAD/CAM indirect restorations. |
| Databáze: | OpenAIRE |
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