![Sample our Medicine, Dentistry, Nursing & Allied Health journals, sign in here to start your FREE access for 14 days]({"type":"image" , "src" : "/sda/5944/TOC-Subject-Sample-2021-Medicine-Dentistry-Nursing-Allied-Health.jpg"})
Abstract
Purpose
This study is to investigate the physical and mechanical properties of various biocomposite resins used with 3D printer for fabrication of orthodontic appliances used for cleft lip and palate patients and compare the results to the properties of self-curing resin used orthodontic appliances.
Material and methods
Density, flexural strength, elastic modulus, hardness, and water absorption and solubility dimensional change ratio, were performed on each sample of the biocomposite resins used in this study and the self-curing resin. For self-curing resin and the other samples, the difference in the average values were tested to determine whether there were significant differences in the average values.
Result
The results of the study showed that a photocurable resin: The elastic modulus and flexural strength were low. The hardness was equivalent. A Polyjet photopolymer: After water absorption, the flexural strength and elastic modulus were significantly lowered. The hardness was equivalent. Acrylic-type biocomposite resin (ABR): The elastic modulus and flexural strength were significantly lower. Furthermore, the amounts of water absorption and solubility were extremely large. When the material dried after water absorption, cracking occurred. Epoxy-type biocomposite resin (EBR): There were no significant differences in the elastic modulus and flexural strength. Hardness was equivalent. EBR showed strength greater than ABR.
Conclusion
The domestically produced prototype EBR tested in this study showed greater strength than ABR and did not contain toxic substances such as Bisphenol A. This suggests that it has a potential to be used as a photocurable resin in the field of dentistry in future.
Acknowledgments
The authors would like to express our gratitude to DETAX GmbH & Co. (Germany), Stratasys, Inc. (United States), and OkaChemi Industry Co. (Saitama) for providing the samples for the physical engineering tests for this study. Also, we wish to thank President Katsuyoshi Mamada of Rapid Manufacturing Akihabara Inc. for processing the domestically produced biocomposite resin using the company's 3D printer.