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http://hdl.handle.net/10397/78937
Title: | Mechanical and clinical evaluation of a shape memory alloy and conventional struts in a flexible scoliotic brace | Authors: | Chan, WY Yip, J Yick, KL Ng, SP Lu, L Cheung, KMC Kwan, KYH Cheung, JPY Yeung, KWK Tse, CY |
Issue Date: | 2018 | Source: | Annals of biomedical engineering, Aug. 2018, v. 46, no. 8, p. 1194-1205 | Abstract: | Smart materials have attracted considerable attention in the medical field. In particular, shape memory alloys (SMAs) are most commonly utilized for their superelasticity (SE) in orthopaedic treatment. In this study, the resin struts of a flexible brace for adolescent idiopathic scoliosis (AIS) are replaced with different conventional materials and an SMA. The corrective mechanism mainly depends on the compressive force applied by the brace at the desired location. Therefore, the mechanical properties of the materials used and the interface pressure are both critical factors that influence the treatment effectiveness. The results indicate that titanium is the most rigid among the five types of materials, whereas the brace with SMA struts presents the best recovery properties and the most stable interface pressure. A radiographic examination of two patients with AIS is then conducted to validate the results, which shows that the SMA struts can provide better correction of thoracic curvature. These findings suggest that SMAs can be applied in orthoses because their SE allows for continuous and controllable corrective forces. | Keywords: | Nitinol Bending stiffness Interface pressure Flexible brace Material selection Scoliosis |
Publisher: | Springer | Journal: | Annals of biomedical engineering | ISSN: | 0090-6964 | EISSN: | 1573-9686 | DOI: | 10.1007/s10439-018-2016-8 | Rights: | © 2018 The Author(s) OPEN ACCESS This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and re-production in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The following publication Chan, W. Y., Yip, J., Yick, K. L., Ng, S. P., Lu, L., Cheung, K. M. C., ... & Tse, C. Y. (2018). Mechanical and clinical evaluation of a shape memory alloy and conventional struts in a flexible scoliotic brace. Annals of biomedical engineering, 46(8), 1194-1205 is available at https://dx.doi.org/10.1007/s10439-018-2016-8 |
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